Quantum dots(QDs)can modulate the solar spectrum through the down-conversion mechanism to better match the spectral response of solar cells.Following previous work,this paper first tested the response of QD solar cell...Quantum dots(QDs)can modulate the solar spectrum through the down-conversion mechanism to better match the spectral response of solar cells.Following previous work,this paper first tested the response of QD solar cells to specific monochromatic light,and found that QDs can effectively improve the photoelectric conversion efficiency(PCE)in the ultraviolet(UV)band by comparison.Then the photoelectric properties of the QD solar cells are tested under the air-mass 1.5(AM1.5)and air-mass 0(AM0)spectra.The experimental results show that because the absorption band of QDs is in the UV region,the space solar cells in the AM0 spectrum can obtain better PCE after coating QDs.The research results show the technical route of space solar cells with down-conversion mechanism,and put forward an important direction for the application of space solar photovoltaic(PV)technology,and have a good application prospect.展开更多
Colloidal quantum dots(CQDs)are highly regarded for their outstanding photovoltaic characteristics,including excellent color purity,stability,high photoluminescence quantum yield(PLQY),narrow emission spectra,and ease...Colloidal quantum dots(CQDs)are highly regarded for their outstanding photovoltaic characteristics,including excellent color purity,stability,high photoluminescence quantum yield(PLQY),narrow emission spectra,and ease of solution processing.Despite significant progress in quantum dot light-emitting diodes(QLEDs)technology since its inception in 1994,blue QLEDs still fall short in efficiency and lifespan compared to red and green versions.The toxicity concerns associated with Cd/Pb-based quantum dots(QDs)have spurred the development of heavy-metal-free alternatives,such as groupⅡ−Ⅵ(e.g.,ZnSe-based QDs),groupⅢ−Ⅴ(e.g.,InP,GaN QDs),and carbon dots(CDs).In this review,we discuss the key properties and development history of quantum dots(QDs),various synthesis approaches,the role of surface ligands,and important considerations in developing core/shell(C/S)structured QDs.Additionally,we provide an outlook on the challenges and future directions for blue QLEDs.展开更多
With the rapid development of electric vehicles,hybrid electric vehicles and smart grids,people's demand for large-scale energy storage devices is increasingly intense.As a new type of secondary battery,potassium ...With the rapid development of electric vehicles,hybrid electric vehicles and smart grids,people's demand for large-scale energy storage devices is increasingly intense.As a new type of secondary battery,potassium ion battery is promising to replace the lithium-ion battery in the field of large-scale energy storage by virtue of its low price and environmental friendliness.At present,the research on the anode materials of potassium ion batteries mainly focuses on carbon materials and the design of various nanostructured metal-based materials.Problems such as poor rate performance and inferior cycle life caused by electrode structure comminution during charge and discharge have not been solved.Quantum dots/nanodots materials are a new type of nanomaterials that can effectively improve the utilization of electrode materials and reduce production costs.In addition,quantum dots/nanodots materials can enhance the electrode reaction kinetics,reduce the stress generated in cycling,and effectively alleviate the agglomeration and crushing of electrode materials.In this review,we will systematically introduce the synthesis methods,K+storage properties and K+storage mechanisms of carbon quantum dots and carbon-based transition metal compound quantum dots composites.This review will have significant references for potassium ion battery researchers.展开更多
Colloidal quantum dots(CQDs)are affected by the quantum confinement effect,which makes their bandgap tunable.This characteristic allows these materials to cover a broader infrared spectrum,providing a costeffective al...Colloidal quantum dots(CQDs)are affected by the quantum confinement effect,which makes their bandgap tunable.This characteristic allows these materials to cover a broader infrared spectrum,providing a costeffective alternative to traditional infrared detector technology.Recently,thanks to the solution processing properties of quantum dots and their ability to integrate with silicon-based readout circuits on a single chip,infrared detectors based on HgTe CQDs have shown great application prospects.However,facing the challenges of vertically stacked photovoltaic devices,such as barrier layer matching and film non-uniformity,most devices integrated with readout circuits still use a planar structure,which limits the efficiency of light absorption and the effective separation and collection of photo-generated carriers.Here,by synthesizing high-quality HgTe CQDs and precisely controlling the interface quality,we have successfully fabricated a photovoltaic detector based on HgTe and ZnO QDs.At a working temperature of 80 K,this detector achieved a low dark current of 5.23×10^(-9)A cm^(-2),a high rectification ratio,and satisfactory detection sensitivity.This work paves a new way for the vertical integration of HgTe CQDs on silicon-based readout circuits,demonstrating their great potential in the field of high-performance infrared detection.展开更多
The discovery of quantum dots(QDs)stands as one of the paramount technological breakthroughs of the 20th century.Their versatility spans from everyday applications to cutting-edge scientific research,encompassing area...The discovery of quantum dots(QDs)stands as one of the paramount technological breakthroughs of the 20th century.Their versatility spans from everyday applications to cutting-edge scientific research,encompassing areas such as displays,lighting,photocatalysis,bio-imaging,and photonics devices and so on.Among the myriad QDs technologies,industrially relevant CuInS_(2)(CIS)QDs have emerged as promising alternatives to traditional Cd-and Pb-based QDs.Their tunable optoelectronic properties,high absorption coefficient,compositional flexibility,remarkable stability as well as Restriction of Hazardous Substances-compliance,with recent trends revealing a renewed interest in this material for various visible and near-infrared technological applications.This review focuses on recent advancements in CIS QDs as multidisciplinary field from its genesis in the mid-1990 to date with an emphasis on key breakthroughs in their synthesis,surface chemistry,post-synthesis modifications,and various applications.First,the comparation of properties of CIS QDs with relevant knowledge from other classes of QDs and from Ⅰ-Ⅱ-Ⅲ semiconductors as well is summarized.Second,recent advances in the synthesis methods,structure-optoelectronic properties,their defects,and passivation strategies as well as CIS-based heterostructures are discussed.Third,the state-of-the-art applications of CIS QDs ranging from solar cells,luminescence solar concentrations,photocatalysis,light emitting diodes,bioimaging and some emerging applications are summarized.Finally,we discuss open challenges and future perspectives for further advancement in this field.展开更多
Hybrid organic–inorganic lead halide perovskites have emerged as a promising material for high-efficiency solar cells,yet challenges related to crystallization and defects limit their performance and stability.This s...Hybrid organic–inorganic lead halide perovskites have emerged as a promising material for high-efficiency solar cells,yet challenges related to crystallization and defects limit their performance and stability.This study investigates the use of perovskite quantum dots(QDs)as crystallization seeds to enhance the quality of FAPbI_(3)perovskite films and improve the performance of perovskite solar cells(PSCs).We demonstrate that CsPbI_(3)and CsPbBr_(3)QDs effectively guide the crystallization process,leading to the formation of larger crystals with preferential orientations,particularly the(001)and(002)planes,which are associated with reduced defect densities.This seedmediated growth strategy resulted in PSCs with power conversion efficiencies(PCEs)of 24.75%and 24.11%,respectively,compared to the baseline efficiency of 22.05%for control devices.Furthermore,devices incorporating QD-treated perovskite films exhibited remarkable stability,maintaining over 80%of their initial PCE after 1000 h of simulated sunlight exposure,a significant improvement over the control.Detailed optoelectronic characterization revealed reduced non-radiative recombination and enhanced charge transport in QD-treated devices.These findings highlight the potential of QDs as a powerful tool to improve perovskite crystallization,facet orientation,and overall device performance,offering a promising route to enhance both efficiency and stability in PSCs.展开更多
Graphene quantum dots(GQDs)are a class of promising carbon-based nanomaterials that have attracted considerable interest from researchers due to their excellent physical,chemical,and biological properties.However,the ...Graphene quantum dots(GQDs)are a class of promising carbon-based nanomaterials that have attracted considerable interest from researchers due to their excellent physical,chemical,and biological properties.However,the high cost,toxicity,and laborious preparation process of GQDs also limit their widespread use.To address this issue,the actual research directions consist in replacing traditional non-renewable feedstocks via screening cheap,easily available,and renewable biomass materials based on the concept of resource conservation and environmental friendliness.Herein,the state-of-the-art technologies in the green preparation of GQDs using biomass as carbon source are reported.Initially,the green synthesis strategies as well as the structural,optical,and biosafety properties of GQDs are discussed in detail.Subsequently,the most representative applications of GQDs in energy and environmental remediation fields are summarized.Finally,the current challenges and future potential of the GQDs are presented.展开更多
We investigate electron mesoscopic transport in a three-terminal setup with coupled quantum dots and a magnetic flux.By mapping the original transport problem into a non-Hermitian Hamiltonian form,we study the interpl...We investigate electron mesoscopic transport in a three-terminal setup with coupled quantum dots and a magnetic flux.By mapping the original transport problem into a non-Hermitian Hamiltonian form,we study the interplay between the coherent couplings between quantum dots,the magnetic flux,and the dissipation due to the tunnel coupling with the reservoirs.展开更多
Carbon quantum dots are a new type of fluorescent nanomaterials with broad applications in drug delivery,bioimaging,solar cells,and photocatalysis due to their unique biocompatibility,optical properties and easy funct...Carbon quantum dots are a new type of fluorescent nanomaterials with broad applications in drug delivery,bioimaging,solar cells,and photocatalysis due to their unique biocompatibility,optical properties and easy functionalization.In the meantime,because of its high carbon content,renewable nature,and environmental friendliness,lignin has drawn the attention of researchers as a desirable raw material for creating carbon quantum dots.Here we review the synthesis of carbon quantum dots from lignin,focusing on synthetic methods,properties,and applications in energy,and photocatalysis.Later,we propose some new development prospects from preparation methods,luminescence mechanism research,application,and commercial cost of lignin carbon quantum dots.Finally,based on this,the development prospects of this field are prospected and summarized.展开更多
Quantum dots(QDs),a type of nanoscale semiconductor material with unique optical and electrical properties like adjustable emission and high photoluminescence quantum yields,are suitable for applications in optoelectr...Quantum dots(QDs),a type of nanoscale semiconductor material with unique optical and electrical properties like adjustable emission and high photoluminescence quantum yields,are suitable for applications in optoelectronics.However,QDs are typically degraded under humid and high-temperature circumstances,greatly limiting their practical value.Coating the QD surface with an inorganic silica layer is a feasible method for improving stability and endurance in a variety of applications.This paper comprehensively reviews silica coating methodologies on QD surfaces and explores their applications in optoelectronic domains.Firstly,the paper provides mainstream silica coating approaches,which can be divided into two categories:in-situ hydrolysis of silylating reagents on QD surfaces and template techniques for encapsulation QDs.Subsequently,the recent applications of the silica-coated QDs on optoelectronic fields including light-emitting diodes,solar cells,photodetectors were discussed.Finally,it reviews recent advances in silica-coated QD technology and prospects for future applications.展开更多
Devising robust S-scheme photocatalysts is of central importance for achieving high-efficient micropollu-tant decontamination.However,the conscious optimization of S-scheme system with high performance remains a prime...Devising robust S-scheme photocatalysts is of central importance for achieving high-efficient micropollu-tant decontamination.However,the conscious optimization of S-scheme system with high performance remains a prime challenge.Herein,carbon quantum dots(CDs)and Mn_(0.5)Cd_(0.5)S(MCS)are mounted on BiOBr(BOB)microspheres,establishing an advanced S-scheme heterojunction with interfacial Bi-S bond.The interfacial Bi-S bonds function as superb channels at atomic-scale to abate the energy barrier for S-scheme charge transportation.Meanwhile,CDs serve as electron collectors to preserve highly reductive electrons from MCS,further augmenting the spatial separation of photo-carriers.Therefore,the optimized CDs/MCS/BOB(MBC)heterojunction manifests significantly strengthened tetracycline hydrochloride(TC)destruction activity and its reaction rate constant is approximately 3.1,2.2,2.1,and 1.5 folds that than that of MCS,BOB,BOB/CDs and MCS/BOB.In addition,MBC exhibits high stability and significant resistance to environmental interferences.The toxicology evaluation confirms the effective abatement of toxicity of TC after treatment.This achievement demonstrates the benefits of CDs-optimized S-scheme photosystems with chemical bonds for photocatalytic water decontamination.展开更多
Black phosphorus quantum dots(BPQDs)have been used as the nano-carrier in the field of biomedicine due to their excellent electronic conductivity,optical and thermoelectric properties.However,it is still lack of evalu...Black phosphorus quantum dots(BPQDs)have been used as the nano-carrier in the field of biomedicine due to their excellent electronic conductivity,optical and thermoelectric properties.However,it is still lack of evaluation of the safety of BPQDs,specifically on the effects and mechanisms of BPQDs on heart.In this study,the specific pathogen-free male mice were orally administered with different doses of BPQDs(0.02,0.1,0.5 mg/kg)for 28 days.BPQDs exposure decreased the heart-body ratio and caused cardiac hypertrophy and fibrosis.Additionally,ferroptosis was observed in the cardiac tissue.The recent study has shown BPQDs oral exposure alter gut microbiota.Here,after exposure to 0.1 mg/kg BPQDs for 28 days,the germ-free mice showed neither cardiac injury nor ferroptosis.Taken together,the study demonstrates that BPQDs induce cardiac ferroptosis and fibrosis,possibly mediated by gut microbiota.This research may aid in enhancing understanding of the biosafety of BP nanomaterials and promoting the sustainable development of nanotechnology.展开更多
The photocatalytic hydrogen peroxide(H_(2)O_(2))production by graphitic carbon nitride is a sustainable and environment-benign alternative approach of conventional anthraquinone autoxidation technology,but it is great...The photocatalytic hydrogen peroxide(H_(2)O_(2))production by graphitic carbon nitride is a sustainable and environment-benign alternative approach of conventional anthraquinone autoxidation technology,but it is great challenges to promote two-electron O_(2)reduction and water oxidation.Herein,we present the well-dispersed graphitic carbon nitride quantum dots decorated with cyano groups(Na-CNQD and K-CNQD)by thermal polymerization of melamine in the presence of metal fluoride.The quantum confinement and edge effect have endowed the photocatalysts with rich active sites,wide light absorption range and the inhibited charge recombination.The cyano moieties function as O_(2)reduction centers to accept the photogenerated electrons and facilitate their rapid transfer to O_(2)molecules.This process enables the selective two-electron reduction of O_(2),leading to the production of H_(2)O_(2).Concurrently,the valence band holes on the heptazine moiety oxidize water into H_(2)O_(2).These synergistic effects promote photocatalytic H_(2)O_(2)production from O_(2)and H_(2)O without the need for additional photosensitizers,organic scavengers and co-catalysts.In contrast,pristine carbon nitride nanosheets remain inactive under the same conditions.This study offers new strategies for rational design of carbon-based materials for solar-to-chemical energy conversion.展开更多
Traditional resistive semiconductor gas sensors suffer from high operating temperatures and poor selectivity.Thus,to address these issues,a highly selective nitrogen dioxide(NO_(2))sensor based on lead sulfide(PbS)qua...Traditional resistive semiconductor gas sensors suffer from high operating temperatures and poor selectivity.Thus,to address these issues,a highly selective nitrogen dioxide(NO_(2))sensor based on lead sulfide(PbS)quantum dots(QDs)–lead molybdate(PbMoO_(4))–molybdenum disulfide(MoS_(2))ternary nanocomposites operating at room temperature was fabricated herein.The ternary nanocomposites were synthesized using an in situ method,yielding Pb S QDs with an average size of~10 nm and PbMoO_(4)nanoparticles in the 10-to 20-nm range,uniformly distributed on ultrathin MoS_(2)nanosheets with an average thickness of~7 nm.The optimized sensor demonstrated a significant improvement in response to 1 ppm NO_(2)at 25℃,achieving a response of 44.5%,which was approximately five times higher than that of the pure MoS_(2)-based sensor(8.5%).The sensor also achieved relatively short response/recovery times and full recovery properties.Notably,the optimal sensor displayed extraordinary selectivity toward NO_(2),showing negligible responses to different interfering gases.Density functional theory(DFT)calculations were conducted to elucidate the underlying sensing mechanism,which was attributed to the enhanced specific surface area,the receptor function of both PbS QDs and PbMoO_(4)nanoparticles,and the transducer function of MoS_(2) nanosheets.展开更多
The endocrine-disrupting chemicals(EDCs)and antibiotics are causing negative effects on human beings and animals by disrupting the endocrine system and spreading antimicrobial resistance.The current need is to eradica...The endocrine-disrupting chemicals(EDCs)and antibiotics are causing negative effects on human beings and animals by disrupting the endocrine system and spreading antimicrobial resistance.The current need is to eradicate pharmaceutical waste from water bodies using advanced catalytic systems with high efficiency.Novel ternary carbon quantum dots(CQDs)decorated Z-Scheme WS_(2)-PANI nanocomposite was prepared by a green synthesis assisted in-situ polymerization for the photodegradation and detection of Estradiol(EST)and Nitrofurantoin(NFT).HRTEM micrographs revealed the formation of CQDs with a mean size of 4nm anchored on the surface of WS_(2)/PANI(width:PANI~20-30nm).The ternary nanocomposite showed excellent photocatalytic activity,degraded NFT(95.7%in 60min),and EST(96.6%in 60min).The rate kinetics study confirms the reaction followed pseudo first-order model.This heterostructure exhibited enhanced performances by modulating the energy level configuration,enhancing the absorption of visible light(2.4eV),and significantly improving the charge separation,three times higher than pristine WS_(2).These are highly favorable for increasing the generation of photoinduced charges and enhancing the overall performance of the catalyst.Further,the electrochemical sensor was prepared using CQDs@WS_(2)/PANI nanocomposite on a paper-based electrode.The CQDs@WS_(2)/PANI exhibit a linear response of 0.1-100nM,with a limit of detection of 13nM.This synergistic interfacial interaction resulted in the significantly improved electrochemical performance of the modified electrode.The proposed Z-scheme was justified by electron paramagnetic resonance(EPR)and scavenger experiment.An intermediate degradation pathway was also proposed.The synthesized materials were characterized using FESEM,HRTEM,XRD,FTIR,XPS,UV-visible spectroscopy,PL,and TRPL.Therefore,this study provides a direct approach to fabricate a heterojunction that combines two-dimensional,one dimensional,and zero-dimensional properties,enabling control over the energy level configuration and subsequent improvements in photocatalytic and electrocatalytic efficiency.展开更多
The authors regret to report some missing information in the synthetic reagents and associated changes of the paper.On page 511,the author information reads:“5.0 mmol of citric acid(C_(6)H_(8)O_(7)),5.0 mmol of ferri...The authors regret to report some missing information in the synthetic reagents and associated changes of the paper.On page 511,the author information reads:“5.0 mmol of citric acid(C_(6)H_(8)O_(7)),5.0 mmol of ferric chloride hexahydrate(FeCl_(3)·6H_(2)O),and 10.0 mmol of o-phenylenediamine(C_(6)H_(8)N_(2))were combined with 40 mL of deionized water and magnetically stirred until fully dissolved.”展开更多
The growing environmental concerns regarding rare earth elements in fluorescent powders,along with high production costs,have increased the demand for sustainable alternatives.We propose a promising solution using lum...The growing environmental concerns regarding rare earth elements in fluorescent powders,along with high production costs,have increased the demand for sustainable alternatives.We propose a promising solution using luminescent metal-organic frameworks(LMOFs)with large surface areas and tunable pore structures,combined with organic carbon quantum dots(CQDs).This study develops a novel white lightemitting diode(WLED)fluorescent powder by incorporating yellow-fluorescent quantum dots(CQDs-Y)into blue-emitting LMOF(ZJU-28),forming the composite material CQDs-Y-n@ZJU-28.The composite exhibits excellent thermal and chemical stability,long-term storage performance,and emits warm white light(CIE:0.3277,0.3281)when subjected to excitation at 365 nm,along with an external quantum efficiency(EQE)of 8.85%.Furthermore,it exhibits tunable emission characteristics and promising LED performance,showcasing a color rendering index(CRI)of 78 and a correlated color temperature of 3384 K.The emitted light undergoes minimal deviation in color towards the white end of the spectrum in the temperature range of 277-437 K,making it an ideal candidate for advanced WLED applications.展开更多
Precise control of luminescence in carbon quantum dots(CQDs),from single-color to full-color emission,is crucial for advancing their applications in biomedical imaging and display technologies.While CQDs luminescence ...Precise control of luminescence in carbon quantum dots(CQDs),from single-color to full-color emission,is crucial for advancing their applications in biomedical imaging and display technologies.While CQDs luminescence is primarily influenced by conjugated domains and surface states,the underlying interaction mechanisms remain poorly understood.This study explores a graded nitro-engineering approach to simultaneously regulate surface states and sp^(2)conjugated domains through nitro(-NO_(2))modulation,enabling comprehensive color tuning.Using o-phenylenediamine(o-PD)as the carbon source and adjusting nitric acid(HNO_(3))concentrations,we synthesized tricolor-emitting nitro-functionalized CQDs(NO_(2)-CQDs).At lower-NO_(2) concentrations,luminescence is mainly influenced by surface states,where the electron-withdrawing effect of-NO_(2) enhancesπ-electron delocalization and stabilizes sp^(2)conjugation.With increasing-NO_(2) content,the lowest unoccupied molecular orbital(LUMO)energy level decreases(-2.12 eV to-3.39 eV),resulting in a red-shift in fluorescence.At higher-NO_(2) concentrations,luminescence is primarily affected by the sp^(2)conjugated domain,where steric hindrance reduces molecular planarity and conjugation,leading to a blue-shift in fluorescence as the sp^(2)domain size decreases(4.03 nm to 2.83 nm).Combining experimental results with density functional theory(DFT)calculations,we reveal the dual role of-NO2in modulating CQDs luminescence,an approach rarely achieved through surface functionalization.This work presents a novel strategy for precise tuning of CQDs luminescence across the visible spectrum.展开更多
Corn stover,an agricultural waste,was used to prepare nitrogen self-doped carbon quantum dots(CQDs)through a simple hydrothermal method with only water at near room temperature for the first time.The surface,electroch...Corn stover,an agricultural waste,was used to prepare nitrogen self-doped carbon quantum dots(CQDs)through a simple hydrothermal method with only water at near room temperature for the first time.The surface,electrochemical,and photovoltaic characteristics of CQDs doped TiO_(2)in dye-sensitized solar cells(DSSCs)were thoroughly and systematically examined.The average diameter of blue-fluorescence CQDs measured by a high-resolution transmission electron microscope(HR-TEM)was 4.63±0.87 nm,which consisted of polar functional groups.The highest occupied molecular orbital(HOMO)and lowest unoccupied molecular orbital(LUMO)energy of the biomass-derived CQDs,determined by the cyclic voltammetry(CV)test,were,−5.48 eV and−3.89 eV,respectively.The negative shift of flat band potential(Vfb)in CQDs incorporated photoanode implies the fermi level shifted upward.Experimental results revealed that the improved performance of DSSCs was due to charge transport enhancement and separation,which resulted in the improved energy level configuration between TiO_(2),CQDs,and electrolytes.In this regard,the CQDs serve as a mediator that enables charge carrier transport without hindrance.In this study,CQDs added to TiO_(2)+N719,increased short circuit current density(JSC)and power conversion efficiency(PCE)value by∼26.00%(10.13 to 12.69 mA/cm^(2))and 27.20%(4.78%to 6.08%),respectively.展开更多
The effects of the Rashba spin–orbit interaction and external electric and magnetic fields on the thermodynamic properties of parabolic quantum dots are investigated.An explicit partition function is derived,and ther...The effects of the Rashba spin–orbit interaction and external electric and magnetic fields on the thermodynamic properties of parabolic quantum dots are investigated.An explicit partition function is derived,and thermodynamic quantities,including specific heat,entropy,and magnetic susceptibility,are analyzed.The behavior of Shannon entropy-related thermodynamic quantities is examined under varying magnetic fields and Hamiltonian parameters through numerical analysis.The results reveal a pronounced Schottky anomaly in the heat capacity at lower temperatures.The susceptibility exhibits a progressive enhancement and transitions to higher values with changes in the quantum dot parameters.In the presence of the Rashba spin–orbit interaction,the specific heat increases with temperature,reaches a peak,and then decreases to zero.Additionally,the susceptibility increases with theβparameter for varying Rashba spin–orbit interaction coefficients,and at a fixed temperature,it further increases with the Rashba coefficient.展开更多
基金supported by the Science&Technology Development Fund of Tianjin Education Commission for Higher Education(No.2022KJ133).
文摘Quantum dots(QDs)can modulate the solar spectrum through the down-conversion mechanism to better match the spectral response of solar cells.Following previous work,this paper first tested the response of QD solar cells to specific monochromatic light,and found that QDs can effectively improve the photoelectric conversion efficiency(PCE)in the ultraviolet(UV)band by comparison.Then the photoelectric properties of the QD solar cells are tested under the air-mass 1.5(AM1.5)and air-mass 0(AM0)spectra.The experimental results show that because the absorption band of QDs is in the UV region,the space solar cells in the AM0 spectrum can obtain better PCE after coating QDs.The research results show the technical route of space solar cells with down-conversion mechanism,and put forward an important direction for the application of space solar photovoltaic(PV)technology,and have a good application prospect.
基金supported by the National Key Research and Development Program of China(2024YFE0103600)the National Natural Science Foundation of China(NSFC)(62474119,62205230,and 62175171)Suzhou Key Laboratory of Functional Nano&Soft Materials,Collaborative Innovation Center of Suzhou Nano Science&Technology,the 111 Project,Joint International Research Laboratory of Carbon-Based Functional Materials and Devices.
文摘Colloidal quantum dots(CQDs)are highly regarded for their outstanding photovoltaic characteristics,including excellent color purity,stability,high photoluminescence quantum yield(PLQY),narrow emission spectra,and ease of solution processing.Despite significant progress in quantum dot light-emitting diodes(QLEDs)technology since its inception in 1994,blue QLEDs still fall short in efficiency and lifespan compared to red and green versions.The toxicity concerns associated with Cd/Pb-based quantum dots(QDs)have spurred the development of heavy-metal-free alternatives,such as groupⅡ−Ⅵ(e.g.,ZnSe-based QDs),groupⅢ−Ⅴ(e.g.,InP,GaN QDs),and carbon dots(CDs).In this review,we discuss the key properties and development history of quantum dots(QDs),various synthesis approaches,the role of surface ligands,and important considerations in developing core/shell(C/S)structured QDs.Additionally,we provide an outlook on the challenges and future directions for blue QLEDs.
基金financial support from the Doctoral Foundation of Henan University of Engineering(No.D2022025)National Natural Science Foundation of China(No.U2004162)+1 种基金National Natural Science Foundation of China(No.52302138)Key Project for Science and Technology Development of Henan Province(No.232102320221)。
文摘With the rapid development of electric vehicles,hybrid electric vehicles and smart grids,people's demand for large-scale energy storage devices is increasingly intense.As a new type of secondary battery,potassium ion battery is promising to replace the lithium-ion battery in the field of large-scale energy storage by virtue of its low price and environmental friendliness.At present,the research on the anode materials of potassium ion batteries mainly focuses on carbon materials and the design of various nanostructured metal-based materials.Problems such as poor rate performance and inferior cycle life caused by electrode structure comminution during charge and discharge have not been solved.Quantum dots/nanodots materials are a new type of nanomaterials that can effectively improve the utilization of electrode materials and reduce production costs.In addition,quantum dots/nanodots materials can enhance the electrode reaction kinetics,reduce the stress generated in cycling,and effectively alleviate the agglomeration and crushing of electrode materials.In this review,we will systematically introduce the synthesis methods,K+storage properties and K+storage mechanisms of carbon quantum dots and carbon-based transition metal compound quantum dots composites.This review will have significant references for potassium ion battery researchers.
基金Supported by National Key Research and Development Program in the 14th five year plan(2021YFA1200700)Strategic Priority Re⁃search Program of the Chinese Academy of Sciences(XDB0580000)Natural Science Foundation of China(62025405,62104235,62105348).
文摘Colloidal quantum dots(CQDs)are affected by the quantum confinement effect,which makes their bandgap tunable.This characteristic allows these materials to cover a broader infrared spectrum,providing a costeffective alternative to traditional infrared detector technology.Recently,thanks to the solution processing properties of quantum dots and their ability to integrate with silicon-based readout circuits on a single chip,infrared detectors based on HgTe CQDs have shown great application prospects.However,facing the challenges of vertically stacked photovoltaic devices,such as barrier layer matching and film non-uniformity,most devices integrated with readout circuits still use a planar structure,which limits the efficiency of light absorption and the effective separation and collection of photo-generated carriers.Here,by synthesizing high-quality HgTe CQDs and precisely controlling the interface quality,we have successfully fabricated a photovoltaic detector based on HgTe and ZnO QDs.At a working temperature of 80 K,this detector achieved a low dark current of 5.23×10^(-9)A cm^(-2),a high rectification ratio,and satisfactory detection sensitivity.This work paves a new way for the vertical integration of HgTe CQDs on silicon-based readout circuits,demonstrating their great potential in the field of high-performance infrared detection.
基金X.H.acknowledges the financial support by Australian Research Council(ARC)Future Fellowship(FT190100756)M.P.S.gratefully acknowledges the support by the ARC under Discovery Early Career Researcher Award(DECRA)(DE210101565)and Discovery Project(DP230101676).
文摘The discovery of quantum dots(QDs)stands as one of the paramount technological breakthroughs of the 20th century.Their versatility spans from everyday applications to cutting-edge scientific research,encompassing areas such as displays,lighting,photocatalysis,bio-imaging,and photonics devices and so on.Among the myriad QDs technologies,industrially relevant CuInS_(2)(CIS)QDs have emerged as promising alternatives to traditional Cd-and Pb-based QDs.Their tunable optoelectronic properties,high absorption coefficient,compositional flexibility,remarkable stability as well as Restriction of Hazardous Substances-compliance,with recent trends revealing a renewed interest in this material for various visible and near-infrared technological applications.This review focuses on recent advancements in CIS QDs as multidisciplinary field from its genesis in the mid-1990 to date with an emphasis on key breakthroughs in their synthesis,surface chemistry,post-synthesis modifications,and various applications.First,the comparation of properties of CIS QDs with relevant knowledge from other classes of QDs and from Ⅰ-Ⅱ-Ⅲ semiconductors as well is summarized.Second,recent advances in the synthesis methods,structure-optoelectronic properties,their defects,and passivation strategies as well as CIS-based heterostructures are discussed.Third,the state-of-the-art applications of CIS QDs ranging from solar cells,luminescence solar concentrations,photocatalysis,light emitting diodes,bioimaging and some emerging applications are summarized.Finally,we discuss open challenges and future perspectives for further advancement in this field.
基金supported by the Startup Research-Fund of Henan Academy of Sciences(grant number 241817242)Shenzhen Fundamental Research Scheme-General Program(JCYJ20220818100217037)+2 种基金Key University Laboratory of Highly Efficient Utilization of Solar Energy,Sustainable Development of Guangdong,Southern University of Science and Technology,Shenzhen 518055,China(Y01256331)the National Natural Science Foundation of China(22379017,22179009,U22A2072)supported by the Pico Center at SUSTech CRF which receives support from the Presidential Fund and Development and Reform Commission of Shenzhen Municipality.
文摘Hybrid organic–inorganic lead halide perovskites have emerged as a promising material for high-efficiency solar cells,yet challenges related to crystallization and defects limit their performance and stability.This study investigates the use of perovskite quantum dots(QDs)as crystallization seeds to enhance the quality of FAPbI_(3)perovskite films and improve the performance of perovskite solar cells(PSCs).We demonstrate that CsPbI_(3)and CsPbBr_(3)QDs effectively guide the crystallization process,leading to the formation of larger crystals with preferential orientations,particularly the(001)and(002)planes,which are associated with reduced defect densities.This seedmediated growth strategy resulted in PSCs with power conversion efficiencies(PCEs)of 24.75%and 24.11%,respectively,compared to the baseline efficiency of 22.05%for control devices.Furthermore,devices incorporating QD-treated perovskite films exhibited remarkable stability,maintaining over 80%of their initial PCE after 1000 h of simulated sunlight exposure,a significant improvement over the control.Detailed optoelectronic characterization revealed reduced non-radiative recombination and enhanced charge transport in QD-treated devices.These findings highlight the potential of QDs as a powerful tool to improve perovskite crystallization,facet orientation,and overall device performance,offering a promising route to enhance both efficiency and stability in PSCs.
基金supported by the following funding:National Natural Science Foundation of China(Nos.52070057 and 51961165104)Project of a Thousand Youth Talents(No.AUGA2160100917)Open Project of State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.2019DX09)。
文摘Graphene quantum dots(GQDs)are a class of promising carbon-based nanomaterials that have attracted considerable interest from researchers due to their excellent physical,chemical,and biological properties.However,the high cost,toxicity,and laborious preparation process of GQDs also limit their widespread use.To address this issue,the actual research directions consist in replacing traditional non-renewable feedstocks via screening cheap,easily available,and renewable biomass materials based on the concept of resource conservation and environmental friendliness.Herein,the state-of-the-art technologies in the green preparation of GQDs using biomass as carbon source are reported.Initially,the green synthesis strategies as well as the structural,optical,and biosafety properties of GQDs are discussed in detail.Subsequently,the most representative applications of GQDs in energy and environmental remediation fields are summarized.Finally,the current challenges and future potential of the GQDs are presented.
基金supported by the National Key R&D Program of China(Grant No.2022YFA1404400)the National Natural Science Foundation of China(Grant No.12125504 and 12305050)+2 种基金Zhejiang Provincial Natural Science Foundation of China(Grant No.LZ25A050001)the Hundred Talents Program of the Chinese Academy of Sciencesthe Natural Science Foundation of Jiangsu Higher Education Institutions of China(Grant No.23KJB140017)。
文摘We investigate electron mesoscopic transport in a three-terminal setup with coupled quantum dots and a magnetic flux.By mapping the original transport problem into a non-Hermitian Hamiltonian form,we study the interplay between the coherent couplings between quantum dots,the magnetic flux,and the dissipation due to the tunnel coupling with the reservoirs.
基金Sponsorship Program by CAST(2023QNRC001)University-Industry Collaborative Education Program(220901115200913,220901115201954)+2 种基金Hunan Provincial Natural Science Foundation of China(2022JJ40007)Jiangsu Agricultural Science and Technology Innovation Fund(CX(22)3047)the National Natural Science Foundation of China(32201491)。
文摘Carbon quantum dots are a new type of fluorescent nanomaterials with broad applications in drug delivery,bioimaging,solar cells,and photocatalysis due to their unique biocompatibility,optical properties and easy functionalization.In the meantime,because of its high carbon content,renewable nature,and environmental friendliness,lignin has drawn the attention of researchers as a desirable raw material for creating carbon quantum dots.Here we review the synthesis of carbon quantum dots from lignin,focusing on synthetic methods,properties,and applications in energy,and photocatalysis.Later,we propose some new development prospects from preparation methods,luminescence mechanism research,application,and commercial cost of lignin carbon quantum dots.Finally,based on this,the development prospects of this field are prospected and summarized.
基金supported by the National Natural Science Foundation of China(Nos.62374142 and 22005255)Fundamental Research Funds for the Central Universities(Nos.20720220085 and 20720240064)+2 种基金External Cooperation Program of Fujian(No.2022I0004)Major Science and Technology Project of Xiamen in China(No.3502Z20191015)Xiamen Natural Science Foundation Youth Project(No.3502Z202471002)。
文摘Quantum dots(QDs),a type of nanoscale semiconductor material with unique optical and electrical properties like adjustable emission and high photoluminescence quantum yields,are suitable for applications in optoelectronics.However,QDs are typically degraded under humid and high-temperature circumstances,greatly limiting their practical value.Coating the QD surface with an inorganic silica layer is a feasible method for improving stability and endurance in a variety of applications.This paper comprehensively reviews silica coating methodologies on QD surfaces and explores their applications in optoelectronic domains.Firstly,the paper provides mainstream silica coating approaches,which can be divided into two categories:in-situ hydrolysis of silylating reagents on QD surfaces and template techniques for encapsulation QDs.Subsequently,the recent applications of the silica-coated QDs on optoelectronic fields including light-emitting diodes,solar cells,photodetectors were discussed.Finally,it reviews recent advances in silica-coated QD technology and prospects for future applications.
基金supported by the NSFC-Zhejiang Joint Fund for Integration of Industrialization and Diversification(No.U1809214)the Natural Science Foundation of Zhejiang Province(Nos.LTGN23E080001 and LY20E080014)+1 种基金the Science and Technology Project of Zhoushan(No.2022C41011)the National Natural Science Foundation of China(No.22201251).
文摘Devising robust S-scheme photocatalysts is of central importance for achieving high-efficient micropollu-tant decontamination.However,the conscious optimization of S-scheme system with high performance remains a prime challenge.Herein,carbon quantum dots(CDs)and Mn_(0.5)Cd_(0.5)S(MCS)are mounted on BiOBr(BOB)microspheres,establishing an advanced S-scheme heterojunction with interfacial Bi-S bond.The interfacial Bi-S bonds function as superb channels at atomic-scale to abate the energy barrier for S-scheme charge transportation.Meanwhile,CDs serve as electron collectors to preserve highly reductive electrons from MCS,further augmenting the spatial separation of photo-carriers.Therefore,the optimized CDs/MCS/BOB(MBC)heterojunction manifests significantly strengthened tetracycline hydrochloride(TC)destruction activity and its reaction rate constant is approximately 3.1,2.2,2.1,and 1.5 folds that than that of MCS,BOB,BOB/CDs and MCS/BOB.In addition,MBC exhibits high stability and significant resistance to environmental interferences.The toxicology evaluation confirms the effective abatement of toxicity of TC after treatment.This achievement demonstrates the benefits of CDs-optimized S-scheme photosystems with chemical bonds for photocatalytic water decontamination.
基金supported by the National Natural Science Foundation of China(No.22376174)the Natural Science Foundation of Xiamen Municipality(No.2022FCX012503010342).
文摘Black phosphorus quantum dots(BPQDs)have been used as the nano-carrier in the field of biomedicine due to their excellent electronic conductivity,optical and thermoelectric properties.However,it is still lack of evaluation of the safety of BPQDs,specifically on the effects and mechanisms of BPQDs on heart.In this study,the specific pathogen-free male mice were orally administered with different doses of BPQDs(0.02,0.1,0.5 mg/kg)for 28 days.BPQDs exposure decreased the heart-body ratio and caused cardiac hypertrophy and fibrosis.Additionally,ferroptosis was observed in the cardiac tissue.The recent study has shown BPQDs oral exposure alter gut microbiota.Here,after exposure to 0.1 mg/kg BPQDs for 28 days,the germ-free mice showed neither cardiac injury nor ferroptosis.Taken together,the study demonstrates that BPQDs induce cardiac ferroptosis and fibrosis,possibly mediated by gut microbiota.This research may aid in enhancing understanding of the biosafety of BP nanomaterials and promoting the sustainable development of nanotechnology.
基金supported by the National Natural Science Foundation of China(22361024 and 22471055)Natural Science Foundation of Jiangxi Province(20232ACB203001)+1 种基金Natural Science Foundation of Hebei Province(B2024202021,B2022202039)S&T Program of Hebei(236Z4308G)。
文摘The photocatalytic hydrogen peroxide(H_(2)O_(2))production by graphitic carbon nitride is a sustainable and environment-benign alternative approach of conventional anthraquinone autoxidation technology,but it is great challenges to promote two-electron O_(2)reduction and water oxidation.Herein,we present the well-dispersed graphitic carbon nitride quantum dots decorated with cyano groups(Na-CNQD and K-CNQD)by thermal polymerization of melamine in the presence of metal fluoride.The quantum confinement and edge effect have endowed the photocatalysts with rich active sites,wide light absorption range and the inhibited charge recombination.The cyano moieties function as O_(2)reduction centers to accept the photogenerated electrons and facilitate their rapid transfer to O_(2)molecules.This process enables the selective two-electron reduction of O_(2),leading to the production of H_(2)O_(2).Concurrently,the valence band holes on the heptazine moiety oxidize water into H_(2)O_(2).These synergistic effects promote photocatalytic H_(2)O_(2)production from O_(2)and H_(2)O without the need for additional photosensitizers,organic scavengers and co-catalysts.In contrast,pristine carbon nitride nanosheets remain inactive under the same conditions.This study offers new strategies for rational design of carbon-based materials for solar-to-chemical energy conversion.
基金supported by the National Natural Science Foundation of China(No.52274255)Fundamental Research Funds for the Central Universities,China(Nos.N2401003,N2301003,N2201008,N2201004,and N2301025)+3 种基金Liaoning Revitalization Talents Program,China(No.XLYC2202028)Postdoctoral Foundation of Northeastern University,ChinaYoung Elite Scientists Sponsorship Program by CAST(No.2022QNRC001)China Postdoctoral Science Foundation(No.2022M720025)。
文摘Traditional resistive semiconductor gas sensors suffer from high operating temperatures and poor selectivity.Thus,to address these issues,a highly selective nitrogen dioxide(NO_(2))sensor based on lead sulfide(PbS)quantum dots(QDs)–lead molybdate(PbMoO_(4))–molybdenum disulfide(MoS_(2))ternary nanocomposites operating at room temperature was fabricated herein.The ternary nanocomposites were synthesized using an in situ method,yielding Pb S QDs with an average size of~10 nm and PbMoO_(4)nanoparticles in the 10-to 20-nm range,uniformly distributed on ultrathin MoS_(2)nanosheets with an average thickness of~7 nm.The optimized sensor demonstrated a significant improvement in response to 1 ppm NO_(2)at 25℃,achieving a response of 44.5%,which was approximately five times higher than that of the pure MoS_(2)-based sensor(8.5%).The sensor also achieved relatively short response/recovery times and full recovery properties.Notably,the optimal sensor displayed extraordinary selectivity toward NO_(2),showing negligible responses to different interfering gases.Density functional theory(DFT)calculations were conducted to elucidate the underlying sensing mechanism,which was attributed to the enhanced specific surface area,the receptor function of both PbS QDs and PbMoO_(4)nanoparticles,and the transducer function of MoS_(2) nanosheets.
基金supported by (Dr. Manika Khanuja, Nanomission, (DST)[DST/NM/NB/2018/203(G) (JMI)]UGC grant (No.F.4(201-FRP)/2015 (BSR))
文摘The endocrine-disrupting chemicals(EDCs)and antibiotics are causing negative effects on human beings and animals by disrupting the endocrine system and spreading antimicrobial resistance.The current need is to eradicate pharmaceutical waste from water bodies using advanced catalytic systems with high efficiency.Novel ternary carbon quantum dots(CQDs)decorated Z-Scheme WS_(2)-PANI nanocomposite was prepared by a green synthesis assisted in-situ polymerization for the photodegradation and detection of Estradiol(EST)and Nitrofurantoin(NFT).HRTEM micrographs revealed the formation of CQDs with a mean size of 4nm anchored on the surface of WS_(2)/PANI(width:PANI~20-30nm).The ternary nanocomposite showed excellent photocatalytic activity,degraded NFT(95.7%in 60min),and EST(96.6%in 60min).The rate kinetics study confirms the reaction followed pseudo first-order model.This heterostructure exhibited enhanced performances by modulating the energy level configuration,enhancing the absorption of visible light(2.4eV),and significantly improving the charge separation,three times higher than pristine WS_(2).These are highly favorable for increasing the generation of photoinduced charges and enhancing the overall performance of the catalyst.Further,the electrochemical sensor was prepared using CQDs@WS_(2)/PANI nanocomposite on a paper-based electrode.The CQDs@WS_(2)/PANI exhibit a linear response of 0.1-100nM,with a limit of detection of 13nM.This synergistic interfacial interaction resulted in the significantly improved electrochemical performance of the modified electrode.The proposed Z-scheme was justified by electron paramagnetic resonance(EPR)and scavenger experiment.An intermediate degradation pathway was also proposed.The synthesized materials were characterized using FESEM,HRTEM,XRD,FTIR,XPS,UV-visible spectroscopy,PL,and TRPL.Therefore,this study provides a direct approach to fabricate a heterojunction that combines two-dimensional,one dimensional,and zero-dimensional properties,enabling control over the energy level configuration and subsequent improvements in photocatalytic and electrocatalytic efficiency.
文摘The authors regret to report some missing information in the synthetic reagents and associated changes of the paper.On page 511,the author information reads:“5.0 mmol of citric acid(C_(6)H_(8)O_(7)),5.0 mmol of ferric chloride hexahydrate(FeCl_(3)·6H_(2)O),and 10.0 mmol of o-phenylenediamine(C_(6)H_(8)N_(2))were combined with 40 mL of deionized water and magnetically stirred until fully dissolved.”
基金financial support of National Key Research and Development Program of China(No.2021YFA1501500)the National Natural Science Foundation of China(Nos.22033008,22220102005,22171265)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(No.2021ZZ103).
文摘The growing environmental concerns regarding rare earth elements in fluorescent powders,along with high production costs,have increased the demand for sustainable alternatives.We propose a promising solution using luminescent metal-organic frameworks(LMOFs)with large surface areas and tunable pore structures,combined with organic carbon quantum dots(CQDs).This study develops a novel white lightemitting diode(WLED)fluorescent powder by incorporating yellow-fluorescent quantum dots(CQDs-Y)into blue-emitting LMOF(ZJU-28),forming the composite material CQDs-Y-n@ZJU-28.The composite exhibits excellent thermal and chemical stability,long-term storage performance,and emits warm white light(CIE:0.3277,0.3281)when subjected to excitation at 365 nm,along with an external quantum efficiency(EQE)of 8.85%.Furthermore,it exhibits tunable emission characteristics and promising LED performance,showcasing a color rendering index(CRI)of 78 and a correlated color temperature of 3384 K.The emitted light undergoes minimal deviation in color towards the white end of the spectrum in the temperature range of 277-437 K,making it an ideal candidate for advanced WLED applications.
基金supported by National Natural Science Foundation of China(No.51873085)Natural Science Foundation of Liaoning Province-Outstanding Youth Foundation(No.2022-YQ-14)+2 种基金Liaoning Revitalization Talents Program(No.XLYC2007056)China Scholarship Council(CSC Scholarship,No.202006800009)the Shenyang Science and Technology Project(No.RC230707)。
文摘Precise control of luminescence in carbon quantum dots(CQDs),from single-color to full-color emission,is crucial for advancing their applications in biomedical imaging and display technologies.While CQDs luminescence is primarily influenced by conjugated domains and surface states,the underlying interaction mechanisms remain poorly understood.This study explores a graded nitro-engineering approach to simultaneously regulate surface states and sp^(2)conjugated domains through nitro(-NO_(2))modulation,enabling comprehensive color tuning.Using o-phenylenediamine(o-PD)as the carbon source and adjusting nitric acid(HNO_(3))concentrations,we synthesized tricolor-emitting nitro-functionalized CQDs(NO_(2)-CQDs).At lower-NO_(2) concentrations,luminescence is mainly influenced by surface states,where the electron-withdrawing effect of-NO_(2) enhancesπ-electron delocalization and stabilizes sp^(2)conjugation.With increasing-NO_(2) content,the lowest unoccupied molecular orbital(LUMO)energy level decreases(-2.12 eV to-3.39 eV),resulting in a red-shift in fluorescence.At higher-NO_(2) concentrations,luminescence is primarily affected by the sp^(2)conjugated domain,where steric hindrance reduces molecular planarity and conjugation,leading to a blue-shift in fluorescence as the sp^(2)domain size decreases(4.03 nm to 2.83 nm).Combining experimental results with density functional theory(DFT)calculations,we reveal the dual role of-NO2in modulating CQDs luminescence,an approach rarely achieved through surface functionalization.This work presents a novel strategy for precise tuning of CQDs luminescence across the visible spectrum.
基金the Department of Energy(DOE,Award Number:DE-FE0031997)for providing funds to support our research.
文摘Corn stover,an agricultural waste,was used to prepare nitrogen self-doped carbon quantum dots(CQDs)through a simple hydrothermal method with only water at near room temperature for the first time.The surface,electrochemical,and photovoltaic characteristics of CQDs doped TiO_(2)in dye-sensitized solar cells(DSSCs)were thoroughly and systematically examined.The average diameter of blue-fluorescence CQDs measured by a high-resolution transmission electron microscope(HR-TEM)was 4.63±0.87 nm,which consisted of polar functional groups.The highest occupied molecular orbital(HOMO)and lowest unoccupied molecular orbital(LUMO)energy of the biomass-derived CQDs,determined by the cyclic voltammetry(CV)test,were,−5.48 eV and−3.89 eV,respectively.The negative shift of flat band potential(Vfb)in CQDs incorporated photoanode implies the fermi level shifted upward.Experimental results revealed that the improved performance of DSSCs was due to charge transport enhancement and separation,which resulted in the improved energy level configuration between TiO_(2),CQDs,and electrolytes.In this regard,the CQDs serve as a mediator that enables charge carrier transport without hindrance.In this study,CQDs added to TiO_(2)+N719,increased short circuit current density(JSC)and power conversion efficiency(PCE)value by∼26.00%(10.13 to 12.69 mA/cm^(2))and 27.20%(4.78%to 6.08%),respectively.
文摘The effects of the Rashba spin–orbit interaction and external electric and magnetic fields on the thermodynamic properties of parabolic quantum dots are investigated.An explicit partition function is derived,and thermodynamic quantities,including specific heat,entropy,and magnetic susceptibility,are analyzed.The behavior of Shannon entropy-related thermodynamic quantities is examined under varying magnetic fields and Hamiltonian parameters through numerical analysis.The results reveal a pronounced Schottky anomaly in the heat capacity at lower temperatures.The susceptibility exhibits a progressive enhancement and transitions to higher values with changes in the quantum dot parameters.In the presence of the Rashba spin–orbit interaction,the specific heat increases with temperature,reaches a peak,and then decreases to zero.Additionally,the susceptibility increases with theβparameter for varying Rashba spin–orbit interaction coefficients,and at a fixed temperature,it further increases with the Rashba coefficient.
