Metal halide perovskites (MHPs) have become promising optoelectronic materials due to their long carrier lifetimes and high mobility. However, the presence of defects and ion migration in MHPs results in high and unst...Metal halide perovskites (MHPs) have become promising optoelectronic materials due to their long carrier lifetimes and high mobility. However, the presence of defects and ion migration in MHPs results in high and unstable dark currents, which compromise the stability and detection performance of MHP-based optoelectronic devices. Interfacial engineering has proven to be an effective strategy to reduce defect density in MHPs and suppress ion migration. Given the compatibility of silicon (Si) and MHP processing technologies, coupled with the simplicity and cost-effectiveness of the approach, the integration of MHPs onto Si surfaces has become a prominent area of research. This integration not only enhances device performance but also expands their practical applications. This review provides an overview of the integration technologies for Si and single crys-tal MHPs, evaluates the advantages and limitations of various integration schemes (including inverse temperature crystallization, vacuum-assisted vapor deposition, and anti-solvent vapor-assisted crystallization), and explores the practical applications of Si/MHP-integrated optoelectronic devices with different structures. These optimized devices exhibit outstanding performance in X-ray detection, multi-wavelength photodetection, and circularly polarized light detection. This review provides a systematic reference for technological innovation and application expansion of Si/MHP-integrated devices.展开更多
Interfacial defects and environmental instability at perovskite surfaces pose significant challenges for inverted perovskite solar cells(PSCs). Surface post-treatment strategies have emerged as a viable approach to im...Interfacial defects and environmental instability at perovskite surfaces pose significant challenges for inverted perovskite solar cells(PSCs). Surface post-treatment strategies have emerged as a viable approach to improve film quality and passivate defects. Although organic molecules can passivate both surfaces and grain boundaries via hydrogen or covalent bonding,their limited adsorption specificity often results in incomplete defect neutralization. In this work, we introduce a bilayer passivation approach employing phenethylammonium iodide(PEAI) and n-octylammonium iodide(OAI) to concurrently mitigate nonradiative recombination and improve stability. PEAI passivates undercoordinated Pb^(2+) at grain boundaries and surfaces, effectively eliminating deep-level traps and suppressing non-radiative losses. Meanwhile, OAI forms a hydrophobic barrier on the perovskite surface through its long alkyl chains, inhibiting moisture penetration without compromising interfacial charge transport. As a result, the perovskite film exhibits significantly enhanced optoelectronic performance and environmental stability,achieving a champion power conversion efficiency(PCE) of 24.48%.展开更多
The recently reported 9-15 K superconductivity in Nd0.8Sr0.2NiO2/SrTi03 heterostructures that were fabricated by a soft-chemical topotactic reduction approach based on precursor Nd0.8Sr0.2NiO3 thin films deposited on ...The recently reported 9-15 K superconductivity in Nd0.8Sr0.2NiO2/SrTi03 heterostructures that were fabricated by a soft-chemical topotactic reduction approach based on precursor Nd0.8Sr0.2NiO3 thin films deposited on SrTiO3 substrates,has excited an immediate surge of research interest.To explore an alternative physical path instead of chemical reduction to realizing superconductivity in this compound,using pulsed laser deposition,we systematically fabricated 63 Nd0.8Sr0.2NiOx(NSNO)thin films at a wide range of oxygen partial pressures on various oxide substrates.Transport measurements did not find any signature of superconductivity in all the 63 thin-film samples.With the oxygen content reducing in the NSNO films by lowering the deposition oxygen pressure,the NSNO films are getting more resistive and finally become insulating.Furthermore,we tried to cap a 20-nm-thick amorphous LaAlO3 layer on a Nd0.8Sr0.2NiO3 thin film deposited at a high oxygen pressure of 20 Pa to create oxygen vacancies on its surface and did not succeed in obtaining higher conductivity either.Our experimental results together with the recent report on the absence of superconductivity in synthesized bulk Nd0.8Sr0.2NiO2 crystals suggest that the chemical reduction approach could be unique for yielding superconductivity in NSNO/SrTiO3 heterostructures.However,SrTiO3 substrates could be reduced to generate oxygen vacancies during the chemical reduction process as well,which may thus partially contribute to conductivity.展开更多
Poly(ethylene naphthalene-2,6-dicarboxylate) (PEN) is an aromatic polyester with molecular structure similar to that of poly(ethylene terephthalate)(PET). In this paper, the space charge storage ability and its stabil...Poly(ethylene naphthalene-2,6-dicarboxylate) (PEN) is an aromatic polyester with molecular structure similar to that of poly(ethylene terephthalate)(PET). In this paper, the space charge storage ability and its stability in corona charged PEN were studied by measurement of surface potential decay under different storage conditions including dif- ferent temperatures and relative humidities, and analysis of open circuit thermally stimu- lated discharge (TSD) current spectra and charge TSD curves. The comparison between the charge stability of PEN and PET was carried out. The results point out that the charge stability of PEN is markedly better than that of PET under different environmental condi- tions. By means of isothermal depolarization program, the space charge lifetimes (effec- tive time constant) τ at room temperature of positively and negatively charged PEN are estimated to be 90 y. The results offer theoretical and technical support for the use of PEN as the chip of high quality electret condenser microphone due to its excellent dielectric, mechanical and thermal properties.展开更多
A 3D nanostructured scaffold as the host for zinc enables effective inhibition of anodic dendrite growth.However,the increased electrode/electrolyte interface area provided by using 3D matrices exacerbates the passiva...A 3D nanostructured scaffold as the host for zinc enables effective inhibition of anodic dendrite growth.However,the increased electrode/electrolyte interface area provided by using 3D matrices exacerbates the passivation and localized corrosion of the Zn anode,ultimately bringing about the degradation of the electrochemical performance.Herein,a nanoscale coating of inorganic-organic hybrid(α-In_(2)Se_(3)-Nafion)onto a flexible carbon nanotubes(CNTs)framework(ISNF@CNTs)is designed as a Zn plating/stripping scaffold to ensure uniform Zn nucleation,thus achieving a dendrite-free and durable Zn anode.The intro-duced inorganic-organic interfacial layer is dense and sturdy,which hinders the direct exposure of deposited Zn to electrolytes and mitigates the side reactions.Meanwhile,the zincophilic nature of ISNF can largely reduce the nucleation energy barrier and promote the ion-diffusion transportation.Consequently,the ISNF@CNTs@Zn electrode exhibits a low-voltage hysteresis and a superior cycling life(over 1500 h),with dendrite-free Zn-plating behaviors in a typical symmetrical cell test.Additionally,the superior feature of ISNF@CNTs@Zn anode is further demonstrated by Zn-MnO_(2)cells in both coin and flexible quasi-solid-state configurations.This work puts forward an inspired remedy for advanced Zn-ion batteries.展开更多
The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular magnets.In this context,the use of expanded porphyrinoids remains elusive since their coordin...The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular magnets.In this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to control.Herein,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine H3Hhp.Remarkably,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive conditions.During this reaction,the oxidation state of the macrocycle did not change.Employing X-ray diffraction analysis,we found that the coordination number of Dy in this complex was 8.The macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-πinteractions.As a result of this organization,a small magnetic coupling between the neighboring molecules was observed.All in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.展开更多
基金financial support from the National Key R&D Program of China(2021YFB3800102)the National Natural Science Foundation of China(12175305)the Beijing Nova Program(20230484298,20240484582).
文摘Metal halide perovskites (MHPs) have become promising optoelectronic materials due to their long carrier lifetimes and high mobility. However, the presence of defects and ion migration in MHPs results in high and unstable dark currents, which compromise the stability and detection performance of MHP-based optoelectronic devices. Interfacial engineering has proven to be an effective strategy to reduce defect density in MHPs and suppress ion migration. Given the compatibility of silicon (Si) and MHP processing technologies, coupled with the simplicity and cost-effectiveness of the approach, the integration of MHPs onto Si surfaces has become a prominent area of research. This integration not only enhances device performance but also expands their practical applications. This review provides an overview of the integration technologies for Si and single crys-tal MHPs, evaluates the advantages and limitations of various integration schemes (including inverse temperature crystallization, vacuum-assisted vapor deposition, and anti-solvent vapor-assisted crystallization), and explores the practical applications of Si/MHP-integrated optoelectronic devices with different structures. These optimized devices exhibit outstanding performance in X-ray detection, multi-wavelength photodetection, and circularly polarized light detection. This review provides a systematic reference for technological innovation and application expansion of Si/MHP-integrated devices.
基金financial support from the National Key R&D Program of China (No. 2021YFB3800102)the Key Research Project of Hefei Normal University (No. 2023QN08)+2 种基金National Natural Science Foundation of China (Nos. U22A20142, 52302324, and 52272252)CASHIPS Director's Fund (Nos. YZJJ-GGZX-2022-01 and YZJJ202304-CX)Dreams Foundation of Jianghuai Advance Technology Center (No. 2023-ZM01X011)。
文摘Interfacial defects and environmental instability at perovskite surfaces pose significant challenges for inverted perovskite solar cells(PSCs). Surface post-treatment strategies have emerged as a viable approach to improve film quality and passivate defects. Although organic molecules can passivate both surfaces and grain boundaries via hydrogen or covalent bonding,their limited adsorption specificity often results in incomplete defect neutralization. In this work, we introduce a bilayer passivation approach employing phenethylammonium iodide(PEAI) and n-octylammonium iodide(OAI) to concurrently mitigate nonradiative recombination and improve stability. PEAI passivates undercoordinated Pb^(2+) at grain boundaries and surfaces, effectively eliminating deep-level traps and suppressing non-radiative losses. Meanwhile, OAI forms a hydrophobic barrier on the perovskite surface through its long alkyl chains, inhibiting moisture penetration without compromising interfacial charge transport. As a result, the perovskite film exhibits significantly enhanced optoelectronic performance and environmental stability,achieving a champion power conversion efficiency(PCE) of 24.48%.
基金financially supported from the National Natural Science Foundation of China(Nos.51822101,51861135104,51771009 and 11704018)
文摘The recently reported 9-15 K superconductivity in Nd0.8Sr0.2NiO2/SrTi03 heterostructures that were fabricated by a soft-chemical topotactic reduction approach based on precursor Nd0.8Sr0.2NiO3 thin films deposited on SrTiO3 substrates,has excited an immediate surge of research interest.To explore an alternative physical path instead of chemical reduction to realizing superconductivity in this compound,using pulsed laser deposition,we systematically fabricated 63 Nd0.8Sr0.2NiOx(NSNO)thin films at a wide range of oxygen partial pressures on various oxide substrates.Transport measurements did not find any signature of superconductivity in all the 63 thin-film samples.With the oxygen content reducing in the NSNO films by lowering the deposition oxygen pressure,the NSNO films are getting more resistive and finally become insulating.Furthermore,we tried to cap a 20-nm-thick amorphous LaAlO3 layer on a Nd0.8Sr0.2NiO3 thin film deposited at a high oxygen pressure of 20 Pa to create oxygen vacancies on its surface and did not succeed in obtaining higher conductivity either.Our experimental results together with the recent report on the absence of superconductivity in synthesized bulk Nd0.8Sr0.2NiO2 crystals suggest that the chemical reduction approach could be unique for yielding superconductivity in NSNO/SrTiO3 heterostructures.However,SrTiO3 substrates could be reduced to generate oxygen vacancies during the chemical reduction process as well,which may thus partially contribute to conductivity.
基金supported by the National Natural Science Foundation of China(Grant No.50503018)the Volkswagen Foundation(Grant No.I/77365).
文摘Poly(ethylene naphthalene-2,6-dicarboxylate) (PEN) is an aromatic polyester with molecular structure similar to that of poly(ethylene terephthalate)(PET). In this paper, the space charge storage ability and its stability in corona charged PEN were studied by measurement of surface potential decay under different storage conditions including dif- ferent temperatures and relative humidities, and analysis of open circuit thermally stimu- lated discharge (TSD) current spectra and charge TSD curves. The comparison between the charge stability of PEN and PET was carried out. The results point out that the charge stability of PEN is markedly better than that of PET under different environmental condi- tions. By means of isothermal depolarization program, the space charge lifetimes (effec- tive time constant) τ at room temperature of positively and negatively charged PEN are estimated to be 90 y. The results offer theoretical and technical support for the use of PEN as the chip of high quality electret condenser microphone due to its excellent dielectric, mechanical and thermal properties.
基金Natural Science Foundation for Young Scientists of Henan Province,Grant/Award Number:202300410071Key Research Project of Henan Provincial Higher Education,Grant/Award Number:21A140007National Natural Science Foundation of China,Grant/Award Numbers:62174049,52003073,52102285。
文摘A 3D nanostructured scaffold as the host for zinc enables effective inhibition of anodic dendrite growth.However,the increased electrode/electrolyte interface area provided by using 3D matrices exacerbates the passivation and localized corrosion of the Zn anode,ultimately bringing about the degradation of the electrochemical performance.Herein,a nanoscale coating of inorganic-organic hybrid(α-In_(2)Se_(3)-Nafion)onto a flexible carbon nanotubes(CNTs)framework(ISNF@CNTs)is designed as a Zn plating/stripping scaffold to ensure uniform Zn nucleation,thus achieving a dendrite-free and durable Zn anode.The intro-duced inorganic-organic interfacial layer is dense and sturdy,which hinders the direct exposure of deposited Zn to electrolytes and mitigates the side reactions.Meanwhile,the zincophilic nature of ISNF can largely reduce the nucleation energy barrier and promote the ion-diffusion transportation.Consequently,the ISNF@CNTs@Zn electrode exhibits a low-voltage hysteresis and a superior cycling life(over 1500 h),with dendrite-free Zn-plating behaviors in a typical symmetrical cell test.Additionally,the superior feature of ISNF@CNTs@Zn anode is further demonstrated by Zn-MnO_(2)cells in both coin and flexible quasi-solid-state configurations.This work puts forward an inspired remedy for advanced Zn-ion batteries.
基金financial support from the Russian Science Foundation (project N 21-13-00221)for the synthesis and studies of optical and magnetic properties of 1supported by the Ministry of Science and Higher Education of the Russian Federation (Registration number 124013100858-3)+2 种基金E.N.I.and M.K.I.acknowledge Grant from the Ministry of Science and Higher Education of the Russian Federation (no.075-15-2021-579)for synthesis of H3Hhp and preliminary DFT calculationssupport from the Spanish MCIN/AEI/10.13039/501100011033 (PID2020-116490GB-I00,TED2021-131255B-C43)the Comunidad de Madrid,and the Spanish State through the Recovery,Transformation and Resilience Plan[“Materiales Disruptivos Bidimensionales (2D)” (MAD2D-CM) (UAM1)-MRR Materiales Avanzados],and the European Union through the Next Generation EU funds.Instituto madrileno de estudios avanzados Nanociencia acknowledges support from the“Severo Ochoa”Programme for Centres of Excellence in R&D (Ministerio de asuntos economicos y transformacion digital,Grant SEV2016-0686).
文摘The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the development of advanced molecular magnets.In this context,the use of expanded porphyrinoids remains elusive since their coordination chemistry is challenging to control.Herein,taking inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine H3Hhp.Remarkably,we observed the selective formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductive conditions.During this reaction,the oxidation state of the macrocycle did not change.Employing X-ray diffraction analysis,we found that the coordination number of Dy in this complex was 8.The macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giving rise to a wellordered solid-state packing,governed byπ-πinteractions.As a result of this organization,a small magnetic coupling between the neighboring molecules was observed.All in all,this work provides key insights into the coordination of magnetically active metals with expanded porphyrinoids,thus motivating the development of advanced spintronic devices.
