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Nano Research 2023年第2期16卷 3387-3394页

作者： Xufeng Chen Junjun Ge Pengwei Xiao Yalei Deng Yuanyuan Wang State Key Laboratory of Coordination Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Achieving nanoconfinement-controlled synthesis of nanoplatelets(NPLs)via solution process under ambient condition remains a *** this work,we developed a general ligand-induced strategy to synthesize colloidal stable all-inorganic semiconductor NPLs with controllable lateral *** introducing certain metal salts(cations:Zn^(2+)and In^(3+),anions:NO_(3)^(−),BF_(4)^(−),or triflate OTf−),wurtzite-structured(WZ-)CdS,CdSe,CdTe,and alloy Cd1−xZnxSe NPLs were directly synthesized in solution through the controlled diffusion of magic-size clusters(MSCs)at room *** studies revealed that destabilization of MSCs and nanoconfined growth in templates facilitated the formation of *** present study not only provides a new synthetic route for the preparation of NPLs but also helps to provide insight into their probable formation mechanism and presents an important advance toward the rational design of functional nanomaterials.

关键词： magic-size cluster nanoplatelets all-inorganic lateral dimensions controlled inorganic ligands

Interfacial Voids Trigger Carbon-Based, all-inorganic Cs Pb IBr2 Perovskite Solar Cells with Photovoltage Exceeding 1.33 V

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Nano-Micro Letters 2020年第7期12卷 121-134页

作者： Weidong Zhu Zeyang Zhang Dandan Chen Wenming Chai Dazheng Chen Jincheng Zhang Chunfu Zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology and Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China College of Science Xi’an Shiyou UniversityXi’an 710065ShaanxiPeople’s Republic of China

A novel interface design is proposed for carbon-based,all-inorganic CsPbIBr2 perovskite solar cells(PSCs)by introducing interfacial voids between TiO2 electron transport layer and CsPbIBr2 *** with the general interfacial engineering strategies,this design exempts any extra modification layer in final *** importantly,the interfacial voids produced by thermal decomposition of 2-phenylethylammonium iodide trigger three beneficial e ***,they promote the light scattering in CsPbIBr2 film and thereby boost absorption ability of the resulting CsPbIBr2 ***,they suppress recombination of charge carriers and thus reduce dark saturation current density(J0)of the ***,interfacial voids enlarge built-in potential(Vbi)of the PSCs,awarding increased driving force for dissociating photo-generated charge ***,the PSC yields the optimized e ciency of 10.20%coupled with an open-circuit voltage(Voc)of 1.338 *** Voc achieved herein represents the best value among CsPbIBr2 PSCs reported ***,the non-encapsulated PSCs exhibit an excellent stability against light,thermal,and humidity stresses,since it remains^97%or^94%of its initial e ciency after being heated at 85℃for 12 h or stored in ambient atmosphere with relative humidity of 30–40%for 60 days,respectively.

关键词： all-inorganic perovskite solar cells Cs Pb IBr2 Photovoltage Interfacial engineering Stability

Recent progress in all-inorganic tin-based perovskite solar cells:a review

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Science China Chemistry 2024年第4期67卷 1117-1136页

作者： Minghao Wang Yu Shi School of Electronics and Information Engineering Wuxi UniversityWuxi 214105China Institute of Advanced Materials Nanjing Tech UniversityNanjing 211816China

Recently,power conversion efficiency(PCE)of organic-inorganic hybrid perovskite solar cells(PSCs)has been improved to26.1%.However,the toxicity issue of lead still hinders the large-scale commercial production and application of lead(Pb)-based halide ***,environmentally friendly tin(Sn)-based perovskites have recently shown excellent *** them,the all-inorganic Sn-based perovskites,including CsSnX_(3) and Cs_(2)SnX_(6),have better stability,more suitable bandgap,and higher charge mobility,which have attracted more attention from researchers than organic-inorganic Sn-based hybrid ***,we review recent research progress on all-inorganic Sn-based perovskite materials and corresponding solar cell ***,we also summarize the current challenges and future research directions for this type of PSCs.

关键词： solar cells perovskite all-inorganic CsSnX_(3) Cs_(2)SnX_(6)

Crystalline all-inorganic lead-free Cs_(3)Sb_(2)I_(9) perovskite microplates with ultra-fast photoconductive response and robust thermal stability

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Nano Research 2021年第11期14卷 4116-4124页

作者： Sujit Kumer Shil Fei Wang Zhengxun Lai You Meng Yunpeng Wang Dongxu Zhao Mohammad Kamal Hossain Kingsley O.Egbo Ying Wang Kin Man Yu Johnny C.Ho Department of Physics City University of Hong KongKowloonHong KongChina Department of Materials Science and Engineering City University of Hong KongKowloonHong KongChina Department of Physics Khulna University of Engineering&Technology(KUET)Khulna9203Bangladesh State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences3888 Dongnanhu RoadChangchun130021China State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong KongChina Department of Physics Comilla UniversityKotbariComilla3506Bangladesh

Hybrid organolead halide perovskites have attracted tremendous attention due to their recent success as high efficiency solar cell materials and their fascinating material properties uniquely suitable for optoelectronic devices. However, the poor ambient and operational stability as well as the concern of lead toxicity greatly hamper their practical utilization. In this work, crystalline, all-inorganic and lead-free Cs_(3)Sb_(2)I_(9) perovskite microplates are successfully synthesized by a two-step chemical vapor deposition method. As compared with other typical lead-free perovskite materials, the Cs_(3)Sb_(2)I_(9) microplates demonstrate excellent optoelectronic properties, including substantial enhancements in the Stokes shift, exciton binding energy and electron-phonon coupling. Simple photoconductive devices fabricated using these microplates exhibit an ultra-fast response with the rise and decay time constants down to 96 and 58 µs, respectively. This respectable photoconductor performance can be regarded as a record among all the lead-free perovskite materials. Importantly, these photodetectors show superior thermal stability in a wide temperature range, capable to function reversibly between 80 and 380 K, indicating their robustness to operate under both low and high temperatures. all these results evidently suggest the technological potential of inorganic lead-free Cs_(3)Sb_(2)I_(9) perovskite microplates for next-generation high-performance optoelectronic devices.

关键词： all-inorganic lead-free perovskites Cs_(3)Sb_(2)I_(9) microplates photoresponse stability

Anti-self-discharge ultrathin all-inorganic electrochromic asymmetric supercapacitors enabling intelligent and effective energy storage

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Rare Metals 2023年第9期42卷 2957-2971页

作者： Lei Liu Chen Liu Meng-Ying Wang Bin Li Ke Wang Xiang-Qian Fan Li-Yong Wang Hui-Qi Wang Sheng-Liang Hu Xun-Gang Diao School of Energy and Power Engineering North University of ChinaTaiyuan030051China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of ScienceShenyang110016China School of Energy and Power Engineering Beihang UniversityBeijing100191China Research Center for Photovoltaics Shanghai Institute of Space Power-SourcesShanghai200245China National Key Laboratory of Electromagnetic Space Security Tianjin300308China

Electrochromic asymmetric supercapacitors(EASs), incorporating electrochromic and energy storage into one platform, are extremely desirable for next-generation civilian portable and smart electronic devices. However, the crucial challenge of their fast self-discharge rate is often overlooked, although it plays an important role in practical application. Unfortunately, very limited research on EAS has focused on this critical problem. Here, an ultrathin all-inorganic EAS with excellent anti-self-discharge performance and superior electrochromic behavior is designed and manufactured by introducing a thin nanofunctional layer at the electrode/electrolyte interface. The prototype all-inorganic EAS exhibited a wide working voltage of 2.2 V, a high energy/power density(81.2mWh·cm^(-3)/0.688 W·cm^(-3)and 30.6 mWh·cm^(-3)/11.02W·cm^(-3)), along with outstanding electrochemical and electrochromic performance even at high ***, the introduced Ta2O5layer can efficiently prohibit the redistribution and diffusion of the movable ions at the fully charged state, endowing the all-inorganic EAS with a tardy self-discharge rate of 12.6 mV·g^(-1),which is an extremely low value when compared with previous reported research. Significantly, the ultrathin allinorganic EASs could also well maintain a slow self-discharge rate and their original electrochemical characteristics under various environmental temperatures. We envision that the novel strategy of electrode/electrolyte interface engineering can effectively deal with the severe self-discharge challenge of EAS, and provide more opportunities for their practical applications.

关键词： Anti-self-discharge Electrochromic Asymmetric supercapacitors(ASCs) all-inorganic Interface

Gram-scale synthesis of all-inorganic perovskite quantum dots with high Mn substitution ratio and enhanced dual-color emission

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Nano Research 2019年第7期12卷 1733-1738页

作者： Lvming Dong Zhuo Chen Lei Ye Yan Yu Jianbing Zhang Huan Liu Jianfeng Zang School of Optical and Electronic Information and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Innovation Institute Huazhong University of Science and TechnologyWuhan 430074China

Mn-doped all-inorganic perovskite quantum dots (QDs) provide prominent applications in the fields of low-cost light source or display,because of their remarkable properties including dual-color emission and reduced lead content,as well as high photoluminescence quantum yields (PLQYs) and high ***,the existing synthesis approaches usually require hash conditions,such as high temperature and nitrogen protection,which is a major hurdler for the practical *** addition,the significantly high Mn substitution ratio in CsPbX3 QDs is still *** real dual-color emission with two strong emission peaks in the Mn-doped all-inorganic perovskite QDs has attracted great *** we present a gram-scale approach to synthesize both CsPbxMn1-xCI3 and CsPb1-xMnxClyBr3-y QDs at 100 ℃ in the air with high Mn substitution ratio,up to 55.64% *** as-prepared CsPb1-xMnxClyBr3-y QDs exhibit high PLQYs of 62.41% and dual-color emission with two strong emission peaks around at 400-450 nm and 600 nm,*** enhanced peak at 400-450 nm is a result of the hybrid halides in CsPbBrxCl3-x ***,the unique advantage of the optical emission and high PLQYs properties of the CsPbxMn1-xCl3 QDs has been demonstrated as invisible ink for encryption applications and polymer *** gram-scale synthesis approach for Mn-doped all-inorganic perovskite QDs may boost the future research and practical applications of QDs-based white LED,spintronics,and molecular barcoding.

关键词： gram-scale enhanced dual-color emission all-inorganic perovskite quantum dots invisible ink polymer composites

Efficient and stable all-inorganic Sb_(2)(S,Se)_(3)solar cells via manipulating energy levels in MnS hole transporting layers

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Science Bulletin 2022年第3期67卷 263-269页

作者： Shaoying Wang Yuqi Zhao Liquan Yao Chuang Li Junbo Gong Guilin Chen Jianmin Li Xudong Xiao Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072China College of Physics and Energy Fujian Normal UniversityFuzhou 350007China

The use of organic hole transport layer(HTL)Spiro-OMeTAD in various solar cells imposes serious stabil-ity and cost problems,and thus calls for inorganic substitute *** this work,a novel inorganic MnS film prepared by thermal evaporation has been demonstrated to serve as a decent HTL in high-performance Sb_(2)(S,Se)_(3)solar cells,providing a cost-effective all-inorganic solution.A low-temperature air-annealing process for the evaporated MnS layer was found to result in a significant positive effect on the power conversion efficiency(PCE)of Sb_(2)(S,Se)_(3)solar cells,due to its better-matched energy band alignment after partial ***,the device with the optimized MnS HTL has achieved an excellent PCE of about 9.24%,which is the highest efficiency among all-inorganic Sb_(2)(S,Se)_(3)solar *** result has revealed that MnS is a feasible substitute for organic HTL in Sb-based solar cells to achieve high PCE,low cost,and high stability.

关键词： Sb^(2)(S,Se)_(3) all-inorganic Solar cells MnS Hole transporting layer

Defect passivation of CsPbI2Br perovskites through Zn（Ⅱ） doping:toward efficient and stable solar cells

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Science China Chemistry 2019年第8期62卷 1044-1050页

作者： Jiajun Lu Shan-Ci Chen Qingdong Zheng State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China

Defect passivation is an important strategy to achieve perovskite solar cells(PVSCs) with enhanced power conversion efficiencies(PCEs) and improved stability because the trap states induced by defects in the interfaces and grain boundaries of perovskites are harmful to both large open circuit voltage and high photocurrent of devices. Here, zinc cations(Zn^2+) were used as a dopant to passivate defects of the CsPbI2Br perovskite leading to Zn^2+-doped CsPbI2Br film with fewer trap states, improved charge transportation, and enhanced light-harvesting ability. Thus, the best-performance PVSC based on CsPbI2 Br with the optimal Zn^2+doping shows a higher PCE of 12.16% with a larger open-circuit voltage(VOC) of 1.236 V, an improved shortcircuit current(JSC) of 15.61 mA cm^-2 in comparison with the control device based on the pure CsPbI2Br which exhibits a PCE of 10.21% with a VOCof 1.123 V, a JSCof 13.27 mA cm^-2. Time-resolved photoluminescence results show that the Zn^2+doping leads to perovskite film with extended photoluminescence lifetime which means a longer diffusion length and subsequently enhanced photocurrent and open circuit voltage. This work provides a simple strategy to boost the performance of PVSCs through Zn^2+doping.

关键词： CsPbI2Br perovskites defect passivation Zn(Ⅱ) doping all-inorganic perovskite solar cells power conversion efficiency

Photodetectors based on inorganic halide perovskites:Materials and devices

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Chinese Physics B 2019年第1期28卷 101-115页

作者： Ying Li Zhi-Feng Shi Xin-Jian Li Chong-Xin Shan School of Physics and Engineering Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China

The newly emerging metal halide perovskites have attracted considerable attention due to their exceptional optoelectronic properties. This upsurge was initially driven when the power conversion efficiency of perovskite-based photovoltaic devices exceeded 23%. Due to their optoelectronic properties, perovskite materials have also been used in light-emitting diodes, photodetectors, lasers, and memory devices. This study comprehensively discusses the recent progress of allinorganic perovskite-based photodetectors, focusing on their structures, morphologies of their constituent materials, and diverse device architectures that improve the performance metrics of these photodetectors. A brief outlook, highlighting the main existing problems, possible solutions to these problems, and future development directions, is also provided herein.

关键词： perovskites all-inorganic photodetectors lead-free

Giant efficiency and color purity enhancement in multicolor inorganic perovskite light-emitting diodes via heating-assisted vacuum deposition

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Journal of Semiconductors 2020年第5期41卷 91-98页

作者： Boning Han Qingsong Shan Fengjuan Zhang Jizhong Song Haibo Zeng School of Materials Science and Engineering Nanjing University of Science and TechnologyNanjing 210094China MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics&NanomaterialsNanjing 210094China School of Physics and Engineering Zhengzhou UniversityZhengzhou 450052China

inorganic perovskites(Cs Pb X3(X=I,Br,Cl))have broad prospection in the field of high-definition displaying due to its excellent optoelectronic *** vacuum deposition process possesses advantages and competitiveness in the industrialized ***,the performance of light emitting diodes(LEDs)based on vacuum-deposited is incredibly ***,we proposed a heating-assisted vacuum deposition(HAVD)method to construct inorganic perovskite LEDs(Pe LEDs)with enhanced *** roughness and crystallinity of perovskite film were improved by regulating the heating treatment of *** the perovskite film exhibited largely rise in luminescence,with decreasing defect ***,with the optimized temperature,the green Pe LEDs exhibited 100-fold improvement of external quantum efficiency(EQE)with the luminance of up to 11941 cd/m2,and the full width at half-maximum(FWHM)of the electroluminescence(EL)spectra was decreased from 25 to 17 *** the same time,the red and blue Pe LEDs also exhibited obvious enhancement in EQE and luminance by HAVD method,and both the FWHM of EL spectra dropped below 20 nm,exhibiting excellent high color *** strategy has a huge potential to be a new commonly used method for low-cost fabrication of displays and lighting.

关键词： all-inorganic perovskites light-emitting diodes heating assisted vacuum deposition Cs Pb Br3 color purity