Lead-tin(Pb-Sn)perovskites with an ideal bandgap of 1.34-1.40 eV show great promise in perovskite solar cells(PSCs).Recently,to address the environmental pollution and Sn^(2+)oxidation problems of dimethyl sulfoxide,m...Lead-tin(Pb-Sn)perovskites with an ideal bandgap of 1.34-1.40 eV show great promise in perovskite solar cells(PSCs).Recently,to address the environmental pollution and Sn^(2+)oxidation problems of dimethyl sulfoxide,methylammonium acetate(MAAc)ionic liquid has been developed as an alternative to fabricate ideal bandgap MAPb_(0.7)Sn_(0.3)I_(3)(1.36 eV)film via hot-casting in air.However,the spontaneous crystallization of Pb-Sn perovskite initiated by heat-induced supersaturation is fast and random,setting critical challenges in regulating crystal growth during the film-forming process.Herein,a lattice activation strategy is developed to control the crystallization dynamics of MAPb_(0.7)Sn_(0.3)I_(3)in MAAc to produce films with micrometer-sized grains in air.FA is shown to activate the crystal lattice that facilitates the formation of intermediates and balances the crystal growth of MAPb_(0.7)Sn_(0.3)I_(3),producing films with a grain size of 2.78±0.17μm.Furthermore,4-fluoro-phenethylammonium and phenethylammonium are adopted to passivate the defects in the film and promote the energy level alignment at the top interface,respectively.The optimized PSC device achieved an efficiency of 18.24%with a short-circuit current of 29.84 mA/cm^(2),which are both the highest values in 1.36 eV Pb-Sn PSCs to date.Notably,the unencapsulated devices show excellent storage and air stability under various conditions.展开更多
Perovskite solar cells(PSCs)have attracted considerable interest due to their excellent optoelectronic properties.However,while single-junction PSCs have achieved remarkable efficiencies,factors such as a limited rang...Perovskite solar cells(PSCs)have attracted considerable interest due to their excellent optoelectronic properties.However,while single-junction PSCs have achieved remarkable efficiencies,factors such as a limited range of developed perovskite materials and immature fabrication processes have constrained their commercialization.Achieving the development of perovskite materials and the preparation of highperformance devices at low cost is a key challenge for the commercialization of PSCs.To address this challenge,machine learning(ML)has been widely applied in the field of PSCs.This paper briefly introduces the basic workflow of ML,providing a foundational understanding for further research on its applications in the PSCs domain.Subsequently,the paper systematically reviews the relevant applications of ML in the PSCs field.Finally,it summarizes the key factors that need to be considered for ML-empowered PSCs and highlights the future directions that should be continuously monitored for development.展开更多
Inverted p-i-n perovskite solar cells(PSCs)based on self-assembled monolayers(SAMs)as hole-selective layers(HSLs)have produced potential record efficiencies of more than 26%by tuning work function,dipole,and passivati...Inverted p-i-n perovskite solar cells(PSCs)based on self-assembled monolayers(SAMs)as hole-selective layers(HSLs)have produced potential record efficiencies of more than 26%by tuning work function,dipole,and passivation defects.However,the stability of the SAM molecules,the stability of the molecular anchoring conformation,and the impact on the stability of subsequent PSCs have not been clearly elucidated.In this review,we systematically discussed the intrinsic connection between the molecular conformation(including anchoring groups,spacer groups,and terminal groups)and the stability of SAMs.Sequentially,the research progress of SAMs as HSLs in improving the stability of PSCs is summarized,including photostability,thermal stability,ion migration,and residual stress.Finally,we look forward to the shortcomings and possible challenges of using SAMs as HSLs for inverted PSCs.展开更多
Low dimensional perovskites have recently attracted much attention due to their vertical growth of crys- talline orientation, excellent film morphology, and long-term humidity, light, and heat stability, How- ever, lo...Low dimensional perovskites have recently attracted much attention due to their vertical growth of crys- talline orientation, excellent film morphology, and long-term humidity, light, and heat stability, How- ever, low dimensional perovskites suffer fl＇om low power conversion efficiency （PCE） with respect to their three dimensional analogues. Therefore, it is imperative to find excellent low-dimensional perovskite materials for improving the PCE. Previous work has demonstrated that bulkier organic molecules, e,g., C6Hs（CH2）2NH3＋ （PEA＋）, CH3（CH2）3NH3＋（n-BAT, iso-BA＋）, C2H4NH3 ＋, and polyethylenimine cations （PEI＋）, play an important role in the formation of low-dimensional perovskites. In this review, we review the recent development of low dimensional perovskites for solar cells application in terms of film preparation, photophysics, and stability of perovskites, as well as the related device structure and physics. We have also discussed the future development of low-dimensional perovskites from materials design, fabri- cation processes, and device structure.展开更多
1.Introduction Carbon neutrality is an important strategy to address the acute problems of resource and environmental constraints.Currently,afforestation,energy conservation,emissions reduction,and other measures have...1.Introduction Carbon neutrality is an important strategy to address the acute problems of resource and environmental constraints.Currently,afforestation,energy conservation,emissions reduction,and other measures have been adopted to offset the total amount of carbon dioxide and other greenhouse gas emissions generated by countries,businesses,products,activities,or individuals,with the aim of finally achieving zero net emissions(Fig.1(a)).展开更多
Interfacial layer has a significant impact on the achievement of highly efficient organic–inorganic hybrid perovskite solar cells(PSCs). Here, we introduced a nano-ZnMgO(magnesium doped ZnO, abbreviated as ZnMgO) as ...Interfacial layer has a significant impact on the achievement of highly efficient organic–inorganic hybrid perovskite solar cells(PSCs). Here, we introduced a nano-ZnMgO(magnesium doped ZnO, abbreviated as ZnMgO) as interfacial layer between [6, 6]-Phenyl C_(61) butyric acid methyl ester(PC_(61) BM) layer and Al electrode to replace LiF or ZnO interlayer and enhance device performance. The device efficiency has been improved from 11.43% to 15.61% and the hysteresis was decreased dramatically. Such huge enhancement of power convert efficiency(PCE) can be attributed to the low dark current density, enhancement of electron-selective contact, and low energy barrier at the PC_(61) BM/Al interface. We suggest that this simple nano-scale interlayer can provide an efficient charge transport and extraction for highly efficient PSCs.展开更多
Pb-free Sn-based perovskite solar cells(PSCs) have recently made inspiring progress, and power conversion efficiency(PCE) of 14.8% has been achieved. However, due to the energy-level mismatch and poor interfacial cont...Pb-free Sn-based perovskite solar cells(PSCs) have recently made inspiring progress, and power conversion efficiency(PCE) of 14.8% has been achieved. However, due to the energy-level mismatch and poor interfacial contact between commonly used hole transport layer(i.e., poly(3,4-ethylenedioxythio phene):poly(styrene sulfonate), PEDOT:PSS) and FASnI_(3) film, it is still challenging to effectively extract holes at the interface. Owing to the p-type nature of Sn-based perovskites, the efficient hole extraction is of particular significance to improve the PCE of their solar cells. In this work, for the first time, the role of chiral cations, a-methylbenzylamine(S-/R-/rac-MBA), in promoting hole transportation of FASnI_(3)-based PSCs is demonstrated. The introduction of MBAs is found to form 2D/3D film with lowdimensional structures locating at PEDOT:PSS/FASnI_(3) interface, which facilitates the energy level alignment and efficient charge transfer at the interface. Importantly, chiral-induced spin selectivity(CISS)effect of R-MBA_(2)SnI_(4)induced by chiral R-MBA cation is found to further assist the specific interfacial transport of accumulated holes. As a result, R-MBA-based PSCs achieve decent PCE of 10.73% with much suppressed hysteresis and enhanced device stability. This work opens up a new strategy to efficiently promote the interfacial extraction of accumulated charges in working PSCs.展开更多
离子液体(ionic liquids,ILs)是一类在室温下为液态的盐类,因其独特的物理和化学性质,在钙钛矿太阳能电池(perovskite solar cells,PSCs)领域展现出广泛的应用潜力.尤其是,ILs在提高PSCs的性能和稳定性方面扮演了重要角色.本文系统总结...离子液体(ionic liquids,ILs)是一类在室温下为液态的盐类,因其独特的物理和化学性质,在钙钛矿太阳能电池(perovskite solar cells,PSCs)领域展现出广泛的应用潜力.尤其是,ILs在提高PSCs的性能和稳定性方面扮演了重要角色.本文系统总结了离子液体作为溶剂的钙钛矿太阳能电池研究进展,重点关注ILs在PSCs制备中的关键功能,并提出了一系列策略来优化和增强ILs在PSCs中的应用,包括界面工程、溶剂工程和添加剂工程.接着,就ILs制备FAPbI_(3)(FA,甲脒)钙钛矿、二维钙钛矿、全无机钙钛矿以及钙钛矿的大规模生产提出了我们的观点.此外,我们还揭示了ILs实现高稳定和高效率PSCs的潜在机制.最后,从大规模生产和技术的角度出发,讨论了ILs基PSCs面临的挑战和未来的研究方向,为PSCs的商业化进程提供了新的视角和方法.展开更多
Nonionic poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)-based inverted wide-bandgap perovskite solar cells(PSCs)are pivotal for advancing all-perovskite tandem architectures and indoor photovoltaics,yet their p...Nonionic poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)-based inverted wide-bandgap perovskite solar cells(PSCs)are pivotal for advancing all-perovskite tandem architectures and indoor photovoltaics,yet their performance is fundamentally constrained by the hydrophobic nature of PTAA.Herein,we demonstrate a dual-interface molecular engineering strategy to synchronously modulate the perovskite-facing upper interface and substrate-contacting buried interface of PTAA using hydrophilic poly(methyl methacrylate)(PMMA)and poly(3-carboxypentyl thiophene)(P3 CT-N).The carbonyl(C=O)groups in PMMA and P3 CT-N synergistically enhance interfacial wettability,promoting the controlled crystallization of 1.78 eV widebandgap perovskites.Additionally,the carbonyl coordination effectively passivates undercoordinated Pb2+defects,improving charge transport dynamics.Meanwhile,vacuum-level shifting induced by the interface dipole of PMMA and P3 CT-N optimizes valence-band alignment,facilitating efficient hole extraction.As a result,the modified PTAA-based single-junction PSCs achieve a remarkable power conversion efficiency(PCE)of 19.38%under AM 1.5G illumination,significantly surpassing the17.06%of pristine PTAA devices.The sandwich polymer structure-based PTAA design further enhances indoor photovoltaic performance,yielding PCEs of 37.43% and 30.09% under 1000 lux and 200 lux LED illumination,respectively.Moreover,in allperovskite tandem configurations,the modified hole transport layer(HTL)enables a remarkable PCE of 26.87%under AM 1.5G illumination,outperforming control devices(25.38%).This strategy provides a robust pathway toward highly efficient and stable indoor and all-perovskite tandem photovoltaics based on wide-bandgap perovskite.展开更多
Recent years have seen increased interest in optoelectronic semiconductor materials,particularly those from groups Ⅱ-Ⅵ,Ⅳ-Ⅵ,and perovskite,due to their outstanding electronic and optical properties.However,the toxi...Recent years have seen increased interest in optoelectronic semiconductor materials,particularly those from groups Ⅱ-Ⅵ,Ⅳ-Ⅵ,and perovskite,due to their outstanding electronic and optical properties.However,the toxicity and environmental concerns related to heavy metals like lead and cadmium have hindered their widespread commercial use,shifting the focus to AgBiS_(2),a nontoxic,cost-effective,and promising alternative.Despite significant progress,the efficiency of AgBiS_(2)remains lower than that of perovskite or cadmium-lead-based devices,primarily due to challenges in nanocrystals(NCs)synthesis and limitations in device structure and stability when using AgBiS_(2)thin films.This review evaluates these challenges by examining the synthesis process,addressing device-related limitations,and discussing recent advancements in AgBiS_(2)research and its potential applications.It includes an analysis of AgBiS_(2)’s chemical and crystal structures,as well as its optoelectronic properties.Additionally,we review improvements in synthesizing high-quality AgBiS_(2)NCs and discuss applications such as photodetectors and X-ray/photoelectrochemical sensors.Finally,we highlight the challenges and future prospects for AgBiS_(2),offering insights into its potential for various applications.展开更多
The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the...The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the improvement of device power conversion efficiency(PCE). In particular, the most commonly used solvents, N,N-dimethylformamide(DMF) and dimethyl sulfoxide(DMSO), have a single chemical interaction with the precursor components and high volatility, which is insufficient to self-regulate the perovskite crystallization process, leading to explosive nucleation and limited growth within mesoporous scaffolds. Here, we report a mixed solvent system composed of methylamine formaldehyde(MAFa)-based ionic liquid and acetonitrile(ACN) with the strong C=O–Pb coordination and N–H···I hydrogen bonding with perovskite components. We found that the mixed solvent system is beneficial for the precursor solution to homogeneously penetrate into the mesoporous scaffold,and the strong C=O–Pb coordination and N–H···I hydrogen bonding interaction can promote the oriented growth of perovskite crystals. This synergistic effect increased the PCE of the p-MPSCs from 17.50% to 19.21%, which is one of the highest records for p-MPSC in recent years. Additionally, the devices exhibit positive environmental stability, retaining over 90% of the original PCE after 1,200 h of aging under AM 1.5 illumination conditions at 55 ℃ and 55% humidity.展开更多
Recently perovskite solar cells(PSCs),as photoelectric conversion devices,exhibit excellent power conversion efficiency(PCE)and low-processing cost,and have become one of the most promising devices to replace conventi...Recently perovskite solar cells(PSCs),as photoelectric conversion devices,exhibit excellent power conversion efficiency(PCE)and low-processing cost,and have become one of the most promising devices to replace conventional silicon-based solar cells and address current pressing energy issues.Among them,the flexible PSCs are especially more widely applicable and may propel the rapid advancements of wearable electronics,causing a significant paradigm shift in consumer electronics.Current flexible PSCs use non-biodegradable petroleum-based polymer substrates,discarding of which will aggravate“white pollution”.Therefore,development of green,biodegradable and low-cost flexible substrates will provide a great alternative to flexible PSCs.Here we have developed transparent nanocellulose paper(NCP)with coating of acrylic resin as substrates to fabricate flexible PSCs,which are biodegradable and easily disposable.The PCE of these NCP-based PSCs reached 4.25%,while the power per weight(the ratio of power to device weight)was as high as 0.56 W g^(–1).The flexible PSCs also showed good stability,retaining>80%of original efficiency after 50 times of bending.The NCP-based substrates can also be applied to other electronic systems,which may prosper next-generation green flexible electronics.展开更多
Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovs...Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells(PSCs)with a simple one-step air processing and without an antisolvent treatment approach.However,it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy.Here,we unambiguously demonstrate that the three functions of solvents,additive,and passivation are present for protic amine carboxylic acid ILs.We found that the ILs have the capability to dissolve a series of perovskite precursors,induce oriented crystallization,and chemically passivate the grain boundaries.This is attributed to the unique molecular structure of ILs with carbonyl and amine groups,allowing for strong interaction with perovskite precursors by forming C=O…Pb chelate bonds and N-H…I hydrogen bonds in both solution and film.This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics.展开更多
CONSPECTUS:Perovskite solar cells(PSCs)have,in recent years,become one of the most in-depth photovoltaic materials in many different disciplines due to their long-range charge carrier diffusion lengths,strong light ab...CONSPECTUS:Perovskite solar cells(PSCs)have,in recent years,become one of the most in-depth photovoltaic materials in many different disciplines due to their long-range charge carrier diffusion lengths,strong light absorption,easy tuning of the band gaps,low defect density,and solution processability.The power conversion efficiency(PCE)of single-junction PSCs has reached a certified value of 25.5%,which has caught up with or even surpassed traditional photovoltaic technologies,such as silicon(Si)solar cells,thin film solar cell,etc.In addition to the performance of PSCs comparable to traditional photovoltaic technology,its biggest feature is that it can be prepared by a solution method.The preparation process of the solution method simplify the film preparation process and greatly reduce the preparation cost.In addition,the solution method provides a favorable option for the energy supply of flexible wearable devices in the future.展开更多
Obtaining long-term stable and robust perovskite colloids solution remains an important scientific challenge due to the limited interaction between solvent and perovskite solutes.Here,we unveil the formation mechanism...Obtaining long-term stable and robust perovskite colloids solution remains an important scientific challenge due to the limited interaction between solvent and perovskite solutes.Here,we unveil the formation mechanism of chemically robust perovskite precursor solutions under ambient conditions using methylammonium acetate(CH3NH3•CH3COO,MAAc)protic ionic liquid(PIL)solvent.Tens of nanometers colloids are assembled on the molecular level via regular oriented gel-like lamellae with a mean thickness of 34.69 nm,width of 56.81 nm,and distance of 91.05 nm.展开更多
In the TOC and Conspectus graphics,“Perovskite Solar Cell”should be replaced by“Perovskite Solar Cells”and“Lonic liquid”should be replaced by“Ionic Liquid”.The corrected image is provided here.
基金financially supported by the Natural Science Foundation of China(52372226,52202300,62288102,62350013,52303325)National Key Research and Development Program of China(2023YFB3608900)+5 种基金the Postdoctoral Fellowship Program ofthe China postdoctoral Science Foundation(CPSF)(Grant GZC20233506)the China Postdoctoral Science Foundation(Grant2024M764252)the Natural Science Foundation of Chongqing China(2023NSCQ-MSX0097)Guangdong Basic and Applied Basic Research Foundation(2024A1515010918)Shenzhen Science and Technology Program(Grant JCYJ20240813150819026)the Fundamental Research Funds for the Central Universities。
文摘Lead-tin(Pb-Sn)perovskites with an ideal bandgap of 1.34-1.40 eV show great promise in perovskite solar cells(PSCs).Recently,to address the environmental pollution and Sn^(2+)oxidation problems of dimethyl sulfoxide,methylammonium acetate(MAAc)ionic liquid has been developed as an alternative to fabricate ideal bandgap MAPb_(0.7)Sn_(0.3)I_(3)(1.36 eV)film via hot-casting in air.However,the spontaneous crystallization of Pb-Sn perovskite initiated by heat-induced supersaturation is fast and random,setting critical challenges in regulating crystal growth during the film-forming process.Herein,a lattice activation strategy is developed to control the crystallization dynamics of MAPb_(0.7)Sn_(0.3)I_(3)in MAAc to produce films with micrometer-sized grains in air.FA is shown to activate the crystal lattice that facilitates the formation of intermediates and balances the crystal growth of MAPb_(0.7)Sn_(0.3)I_(3),producing films with a grain size of 2.78±0.17μm.Furthermore,4-fluoro-phenethylammonium and phenethylammonium are adopted to passivate the defects in the film and promote the energy level alignment at the top interface,respectively.The optimized PSC device achieved an efficiency of 18.24%with a short-circuit current of 29.84 mA/cm^(2),which are both the highest values in 1.36 eV Pb-Sn PSCs to date.Notably,the unencapsulated devices show excellent storage and air stability under various conditions.
基金supported by the Fundamental Research Funds for the Central Universities,Sun Yat-sen University,under Grant No.24hytd010。
文摘Perovskite solar cells(PSCs)have attracted considerable interest due to their excellent optoelectronic properties.However,while single-junction PSCs have achieved remarkable efficiencies,factors such as a limited range of developed perovskite materials and immature fabrication processes have constrained their commercialization.Achieving the development of perovskite materials and the preparation of highperformance devices at low cost is a key challenge for the commercialization of PSCs.To address this challenge,machine learning(ML)has been widely applied in the field of PSCs.This paper briefly introduces the basic workflow of ML,providing a foundational understanding for further research on its applications in the PSCs domain.Subsequently,the paper systematically reviews the relevant applications of ML in the PSCs field.Finally,it summarizes the key factors that need to be considered for ML-empowered PSCs and highlights the future directions that should be continuously monitored for development.
基金supported by the Natural Science Foundation of China(22425903,U24A20568,61705102,62288102,22409091,22409090 and 62205142)the National Key R&D Program of China(2023YFB4204500)the Jiangsu Provincial Departments of Science and Technology(BE2022023,BK20220010,BZ2023060,BK20240561,and BK20240562)。
文摘Inverted p-i-n perovskite solar cells(PSCs)based on self-assembled monolayers(SAMs)as hole-selective layers(HSLs)have produced potential record efficiencies of more than 26%by tuning work function,dipole,and passivation defects.However,the stability of the SAM molecules,the stability of the molecular anchoring conformation,and the impact on the stability of subsequent PSCs have not been clearly elucidated.In this review,we systematically discussed the intrinsic connection between the molecular conformation(including anchoring groups,spacer groups,and terminal groups)and the stability of SAMs.Sequentially,the research progress of SAMs as HSLs in improving the stability of PSCs is summarized,including photostability,thermal stability,ion migration,and residual stress.Finally,we look forward to the shortcomings and possible challenges of using SAMs as HSLs for inverted PSCs.
基金financially supported by the National Basic Research Program of China,Fundamental Studies of Perovskite Solar Cells(Grant 2015CB932200)the Natural Science Foundation of China(Grant 51035063)+2 种基金Natural Science Foundation of Jiangsu Province,China(Grants 55135039 and 55135040)Jiangsu Specially-Appointed Professor program(Grant 54907024)Startup from Nanjing Tech University(Grants 3983500160,3983500151,and 44235022)
文摘Low dimensional perovskites have recently attracted much attention due to their vertical growth of crys- talline orientation, excellent film morphology, and long-term humidity, light, and heat stability, How- ever, low dimensional perovskites suffer fl＇om low power conversion efficiency （PCE） with respect to their three dimensional analogues. Therefore, it is imperative to find excellent low-dimensional perovskite materials for improving the PCE. Previous work has demonstrated that bulkier organic molecules, e,g., C6Hs（CH2）2NH3＋ （PEA＋）, CH3（CH2）3NH3＋（n-BAT, iso-BA＋）, C2H4NH3 ＋, and polyethylenimine cations （PEI＋）, play an important role in the formation of low-dimensional perovskites. In this review, we review the recent development of low dimensional perovskites for solar cells application in terms of film preparation, photophysics, and stability of perovskites, as well as the related device structure and physics. We have also discussed the future development of low-dimensional perovskites from materials design, fabri- cation processes, and device structure.
基金financially supported by the National Natural Science Foundation of China(51972172 and 62205142)the Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars,China(BK20200034)+7 种基金the Jiangsu Provincial Departments of Science and Technology(BE2022023 and BK20220010)the Innovation Project of Optics Valley Laboratory(OVL2021BG006)the Open Project Program of Wuhan National Laboratory for Optoelectronics(2021WNLOKF003)Projects of International Cooperation and Exchanges NSFC(51811530018)the Young 1000 Talents Global Recruitment Program of ChinaInnovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2021041)the Natural Science Basic Research Plan in Shaanxi Province of China(2021JLM-43)the Joint Research Funds of Department of Science and Technology of Shaanxi Province and Northwestern Polytechnical University(2020GXLH-Z007 and 2020GXLH-Z-014)。
文摘1.Introduction Carbon neutrality is an important strategy to address the acute problems of resource and environmental constraints.Currently,afforestation,energy conservation,emissions reduction,and other measures have been adopted to offset the total amount of carbon dioxide and other greenhouse gas emissions generated by countries,businesses,products,activities,or individuals,with the aim of finally achieving zero net emissions(Fig.1(a)).
基金financially supported by the National Basic Research Program of China, Fundamental Studies of Perovskite Solar Cells (Grant 2015CB932200)the Natural Science Foundation of China (Grants 51602149 and 61705102)+4 种基金Natural Science Foundation of Jiangsu Province, China(Grants BK20161011 and BK20161010)Young 1000 Talents Global Recruitment Program of ChinaJiangsu Specially-Appointed Professor program"Six talent peaks" Project in Jiangsu Province, ChinaStartup from Nanjing Tech University
文摘Interfacial layer has a significant impact on the achievement of highly efficient organic–inorganic hybrid perovskite solar cells(PSCs). Here, we introduced a nano-ZnMgO(magnesium doped ZnO, abbreviated as ZnMgO) as interfacial layer between [6, 6]-Phenyl C_(61) butyric acid methyl ester(PC_(61) BM) layer and Al electrode to replace LiF or ZnO interlayer and enhance device performance. The device efficiency has been improved from 11.43% to 15.61% and the hysteresis was decreased dramatically. Such huge enhancement of power convert efficiency(PCE) can be attributed to the low dark current density, enhancement of electron-selective contact, and low energy barrier at the PC_(61) BM/Al interface. We suggest that this simple nano-scale interlayer can provide an efficient charge transport and extraction for highly efficient PSCs.
基金financially supported by the Natural Science Foundation of China (Grants 51802253, 51972172, 61705102,61904152, and 91833304)the China Postdoctoral Science Foundation (Grant 2021M692630)+6 种基金the Natural Science Basic Research Plan in Shaanxi Province of China (2019JM-326)the Joint Research Funds of Department of Science&Technology of Shaanxi Province and Northwestern Polytechnical University (No. 2020GXLH-Z-007)the Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars,China (Grant BK20200034)the Young 1000 Talents Global Recruitment Program of Chinathe Jiangsu Specially Appointed Professor programthe “Six talent peaks” Project in Jiangsu Province,Chinathe Fundamental Research Funds for the Central Universities。
文摘Pb-free Sn-based perovskite solar cells(PSCs) have recently made inspiring progress, and power conversion efficiency(PCE) of 14.8% has been achieved. However, due to the energy-level mismatch and poor interfacial contact between commonly used hole transport layer(i.e., poly(3,4-ethylenedioxythio phene):poly(styrene sulfonate), PEDOT:PSS) and FASnI_(3) film, it is still challenging to effectively extract holes at the interface. Owing to the p-type nature of Sn-based perovskites, the efficient hole extraction is of particular significance to improve the PCE of their solar cells. In this work, for the first time, the role of chiral cations, a-methylbenzylamine(S-/R-/rac-MBA), in promoting hole transportation of FASnI_(3)-based PSCs is demonstrated. The introduction of MBAs is found to form 2D/3D film with lowdimensional structures locating at PEDOT:PSS/FASnI_(3) interface, which facilitates the energy level alignment and efficient charge transfer at the interface. Importantly, chiral-induced spin selectivity(CISS)effect of R-MBA_(2)SnI_(4)induced by chiral R-MBA cation is found to further assist the specific interfacial transport of accumulated holes. As a result, R-MBA-based PSCs achieve decent PCE of 10.73% with much suppressed hysteresis and enhanced device stability. This work opens up a new strategy to efficiently promote the interfacial extraction of accumulated charges in working PSCs.
文摘离子液体(ionic liquids,ILs)是一类在室温下为液态的盐类,因其独特的物理和化学性质,在钙钛矿太阳能电池(perovskite solar cells,PSCs)领域展现出广泛的应用潜力.尤其是,ILs在提高PSCs的性能和稳定性方面扮演了重要角色.本文系统总结了离子液体作为溶剂的钙钛矿太阳能电池研究进展,重点关注ILs在PSCs制备中的关键功能,并提出了一系列策略来优化和增强ILs在PSCs中的应用,包括界面工程、溶剂工程和添加剂工程.接着,就ILs制备FAPbI_(3)(FA,甲脒)钙钛矿、二维钙钛矿、全无机钙钛矿以及钙钛矿的大规模生产提出了我们的观点.此外,我们还揭示了ILs实现高稳定和高效率PSCs的潜在机制.最后,从大规模生产和技术的角度出发,讨论了ILs基PSCs面临的挑战和未来的研究方向,为PSCs的商业化进程提供了新的视角和方法.
基金supported by the National Natural Science Foundation of China(62205142,22425903,U24A20568,61705102,62288102,222409091,22409090)the National Key R&D Program of China(2023YFB4204500,2020YFA07099003)the Jiangsu Provincial Department of Science and Technology(BE2022023,BK20220010,BZ2023060,BK20241875)。
文摘Nonionic poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)-based inverted wide-bandgap perovskite solar cells(PSCs)are pivotal for advancing all-perovskite tandem architectures and indoor photovoltaics,yet their performance is fundamentally constrained by the hydrophobic nature of PTAA.Herein,we demonstrate a dual-interface molecular engineering strategy to synchronously modulate the perovskite-facing upper interface and substrate-contacting buried interface of PTAA using hydrophilic poly(methyl methacrylate)(PMMA)and poly(3-carboxypentyl thiophene)(P3 CT-N).The carbonyl(C=O)groups in PMMA and P3 CT-N synergistically enhance interfacial wettability,promoting the controlled crystallization of 1.78 eV widebandgap perovskites.Additionally,the carbonyl coordination effectively passivates undercoordinated Pb2+defects,improving charge transport dynamics.Meanwhile,vacuum-level shifting induced by the interface dipole of PMMA and P3 CT-N optimizes valence-band alignment,facilitating efficient hole extraction.As a result,the modified PTAA-based single-junction PSCs achieve a remarkable power conversion efficiency(PCE)of 19.38%under AM 1.5G illumination,significantly surpassing the17.06%of pristine PTAA devices.The sandwich polymer structure-based PTAA design further enhances indoor photovoltaic performance,yielding PCEs of 37.43% and 30.09% under 1000 lux and 200 lux LED illumination,respectively.Moreover,in allperovskite tandem configurations,the modified hole transport layer(HTL)enables a remarkable PCE of 26.87%under AM 1.5G illumination,outperforming control devices(25.38%).This strategy provides a robust pathway toward highly efficient and stable indoor and all-perovskite tandem photovoltaics based on wide-bandgap perovskite.
基金supported by the Fundamental Research Funds for the Central Universities,Sun Yat-sen University(Grant No.24hytd010).
文摘Recent years have seen increased interest in optoelectronic semiconductor materials,particularly those from groups Ⅱ-Ⅵ,Ⅳ-Ⅵ,and perovskite,due to their outstanding electronic and optical properties.However,the toxicity and environmental concerns related to heavy metals like lead and cadmium have hindered their widespread commercial use,shifting the focus to AgBiS_(2),a nontoxic,cost-effective,and promising alternative.Despite significant progress,the efficiency of AgBiS_(2)remains lower than that of perovskite or cadmium-lead-based devices,primarily due to challenges in nanocrystals(NCs)synthesis and limitations in device structure and stability when using AgBiS_(2)thin films.This review evaluates these challenges by examining the synthesis process,addressing device-related limitations,and discussing recent advancements in AgBiS_(2)research and its potential applications.It includes an analysis of AgBiS_(2)’s chemical and crystal structures,as well as its optoelectronic properties.Additionally,we review improvements in synthesizing high-quality AgBiS_(2)NCs and discuss applications such as photodetectors and X-ray/photoelectrochemical sensors.Finally,we highlight the challenges and future prospects for AgBiS_(2),offering insights into its potential for various applications.
基金financially supported by the Natural Science Foundation of China (62288102, 22379067, 52172198, 61705102, 62205142 and 52302266)the National Key R&D Program of China (2023YFB4204500)+4 种基金the Jiangsu Provincial Departments of Science and Technology (BE2022023, BK20220010, and BZ2023060)the Innovation Project of Optics Valley Laboratory (OVL2021BG006)the Open Project Program of Wuhan National Laboratory for Optoelectronics (2021WNLOKF003)the Natural Science Basic Research Plan in Shaanxi Province of China (2021JLM-43)the Joint Research Funds of Department of Science & Technology of Shaanxi Province and Northwestern Polytechnical University (2020GXLH-Z-007 and 2020GXLH-Z-014)。
文摘The low-cost and scalable printable mesoporous perovskite solar cells(p-MPSCs) face significant challenges in regulating perovskite crystal growth due to their nanoscale mesoporous scaffold structure, which limits the improvement of device power conversion efficiency(PCE). In particular, the most commonly used solvents, N,N-dimethylformamide(DMF) and dimethyl sulfoxide(DMSO), have a single chemical interaction with the precursor components and high volatility, which is insufficient to self-regulate the perovskite crystallization process, leading to explosive nucleation and limited growth within mesoporous scaffolds. Here, we report a mixed solvent system composed of methylamine formaldehyde(MAFa)-based ionic liquid and acetonitrile(ACN) with the strong C=O–Pb coordination and N–H···I hydrogen bonding with perovskite components. We found that the mixed solvent system is beneficial for the precursor solution to homogeneously penetrate into the mesoporous scaffold,and the strong C=O–Pb coordination and N–H···I hydrogen bonding interaction can promote the oriented growth of perovskite crystals. This synergistic effect increased the PCE of the p-MPSCs from 17.50% to 19.21%, which is one of the highest records for p-MPSC in recent years. Additionally, the devices exhibit positive environmental stability, retaining over 90% of the original PCE after 1,200 h of aging under AM 1.5 illumination conditions at 55 ℃ and 55% humidity.
基金This work was financially supported by the National Natural Science Foundation of China(Grants 21675085,51602149,61705102,and 91733302)the National Key R&D Program of China(Grant 2017YFA0204700)+3 种基金the National Basic Research Program of China,Fundamental Studies of Perovskite Solar Cells(Grant 2015CB932200)the Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars(Grant BK20170042)the Natural Science Foundation of Jiangsu Province(Grants BK20161011 and BK20161010)Young 1000 Talents Global Recruitment Program of China,Jiangsu Specially-Appointed Professor Program,and“Six Talent Peaks”Project in Jiangsu Province,China.
文摘Recently perovskite solar cells(PSCs),as photoelectric conversion devices,exhibit excellent power conversion efficiency(PCE)and low-processing cost,and have become one of the most promising devices to replace conventional silicon-based solar cells and address current pressing energy issues.Among them,the flexible PSCs are especially more widely applicable and may propel the rapid advancements of wearable electronics,causing a significant paradigm shift in consumer electronics.Current flexible PSCs use non-biodegradable petroleum-based polymer substrates,discarding of which will aggravate“white pollution”.Therefore,development of green,biodegradable and low-cost flexible substrates will provide a great alternative to flexible PSCs.Here we have developed transparent nanocellulose paper(NCP)with coating of acrylic resin as substrates to fabricate flexible PSCs,which are biodegradable and easily disposable.The PCE of these NCP-based PSCs reached 4.25%,while the power per weight(the ratio of power to device weight)was as high as 0.56 W g^(–1).The flexible PSCs also showed good stability,retaining>80%of original efficiency after 50 times of bending.The NCP-based substrates can also be applied to other electronic systems,which may prosper next-generation green flexible electronics.
基金This work was financially supported by the Natural Science Foundation of China(Grants 51972172,61705102,and 91833304)the Natural Science Basic Research Plan in Shaanxi Province of China(2019JM-326)+2 种基金the Young 1000 Talents Global Recruitment Program of Chinathe Fundamental Research Funds for the Central UniversitiesThis work also was financially supported by the National Key Research and Development Program of China(grant no.2017YFA0403400).
文摘Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells(PSCs)with a simple one-step air processing and without an antisolvent treatment approach.However,it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy.Here,we unambiguously demonstrate that the three functions of solvents,additive,and passivation are present for protic amine carboxylic acid ILs.We found that the ILs have the capability to dissolve a series of perovskite precursors,induce oriented crystallization,and chemically passivate the grain boundaries.This is attributed to the unique molecular structure of ILs with carbonyl and amine groups,allowing for strong interaction with perovskite precursors by forming C=O…Pb chelate bonds and N-H…I hydrogen bonds in both solution and film.This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics.
基金The authors acknowledge the Natural Science Foundation of China(Grants 91833304,51972172,and 91733302)Natural Science Foundation of Jiangsu Province for Distinguished Young Scholars,China(Grant BK20200034)+2 种基金National Key Research and Development Program of China(Grant 2017YFA0403400)Projects of International Cooperation and Exchanges NSFC(51811530018)Young 1000 Talents Global Recruitment Program of China,Sponsored by Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(CX2021041).
文摘CONSPECTUS:Perovskite solar cells(PSCs)have,in recent years,become one of the most in-depth photovoltaic materials in many different disciplines due to their long-range charge carrier diffusion lengths,strong light absorption,easy tuning of the band gaps,low defect density,and solution processability.The power conversion efficiency(PCE)of single-junction PSCs has reached a certified value of 25.5%,which has caught up with or even surpassed traditional photovoltaic technologies,such as silicon(Si)solar cells,thin film solar cell,etc.In addition to the performance of PSCs comparable to traditional photovoltaic technology,its biggest feature is that it can be prepared by a solution method.The preparation process of the solution method simplify the film preparation process and greatly reduce the preparation cost.In addition,the solution method provides a favorable option for the energy supply of flexible wearable devices in the future.
基金supported by the Natural Science Foundation of China(grant nos.51602149,61705102,61605073,61935017,62175268,and 22022309)the Macao Science and Technology Development Fund(grant no.FDCT-0044/2020/A1)+3 种基金research grants(grant nos.MYRG2018-00148-IAPME and MYRG2020-00151-IAPME)from the University of Macao and Natural Science Foundation of Guangdong Province,China(grant no.2019A1515012186)Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials(grant no.2019B121205002)Shenzhen-Hong Kong-Macao Science and Technology Innovation Project(Category C)(grant no.SGDX2020110309360100)and the Young 1000 Talents Global Recruitment Program of China.
文摘Obtaining long-term stable and robust perovskite colloids solution remains an important scientific challenge due to the limited interaction between solvent and perovskite solutes.Here,we unveil the formation mechanism of chemically robust perovskite precursor solutions under ambient conditions using methylammonium acetate(CH3NH3•CH3COO,MAAc)protic ionic liquid(PIL)solvent.Tens of nanometers colloids are assembled on the molecular level via regular oriented gel-like lamellae with a mean thickness of 34.69 nm,width of 56.81 nm,and distance of 91.05 nm.
文摘In the TOC and Conspectus graphics,“Perovskite Solar Cell”should be replaced by“Perovskite Solar Cells”and“Lonic liquid”should be replaced by“Ionic Liquid”.The corrected image is provided here.
