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Chinese Chemical Letters 2024年第5期35卷 504-508页

作者： Pan Liu Yanming Sun Alberto J.Fernández-Carrión Bowen Zhang Hui Fu Lunhua He Xing Ming Congling Yin Xiaojun Kuang MOE Key Laboratory of New Processing Technology for Nonferrous Metal and Materials Guangxi Key Laboratory of Optic and Electronic Materials and DevicesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Spallation Neutron Source Science Center Dongguan 523803China Chinese Academic of Science Institute of PhysicsBeijing National Laboratory for Condensed Matter PhysicsBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China College of Science Guilin University of TechnologyGuilin 541004China College of Chemistry and Bioengineering Guilin University of TechnologyGuilin 541004China

A new bismuth-based halide double perovskite Cs_(2)KBiCl_(6) was isolated successfully through solid-state reactions and investigated using X-ray and neutron *** than an ordered structure,the crystal structure consists of shifted Cs,K,Bi,and Cl sites from the ideal positions with fractional occupancy in compensation,leading to variable local coordination of Cs^(+)ions,as revealed by^(133)Cs solid-state nuclear magnetic resonance ***_(2)KBiCl_(6) displays volume hysteresis at 5-298 K range upon heating and *** Cs_(2)KBiCl_(6) has a direct bandgap of 3.35(2)eV and red-shift luminescence of around 600 nm upon Mn doping compared with the Na *** stabilization of disordered structure in Cs_(2)KBiCl_(6) is related to two factors including the large-sized K^(+)cation which prefers to coordinate with more than six Cl^(-),and the Bi^(3+)with 6s^(2) lone pair which has a preference for a local asymmetric *** findings could have general application and help to understand the structure and property of halide perovskites.

关键词： halide perovskite Double perovskite Luminescence Disordered structure Direct bandgap

Electron-beam-induced degradation of halide-perovskite-related semiconductor nanomaterials

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Chinese Optics Letters 2021年第3期19卷 8-12页

作者： Zhiya Dang Yuqing Luo Xue-Sen Wang Muhammad Imran Pingqi Gao School of Materials Sun Yat-sen UniversityGuangzhou 510006China Department of Physics National University of SingaporeSingapore 117551Singapore Department of Nanochemistry Istituto Italiano di TecnologiaVia Morego 30Genova 16163Italy

The instability of lead halide perovskites in various application-related conditions is a key challenge to be resolved. We investigated the formation of metal nanoparticles during transmission electron microscopy(TEM) imaging of perovskite-related metal halide compounds. The metal nanoparticle formation on these materials originates from stimulated desorption of halogen under electron beams and subsequent aggregation of metal atoms. Based on shared mechanisms,the TEM-based degradation test can help to evaluate the material stability against light irradiation.

关键词： halide perovskite TEM degradation electronic transition stimulated desorption

Recent progress in lanthanide ions doped inorganic metal halide perovskites

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Journal of Rare Earths 2024年第2期42卷 237-250,I0001页

作者： Yiyan Zhang Tianyu Zhao Guanying Chen MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Laboratory of Urban Water Resource and EnvironmentKey Laboratory of Micro-systems and Micro-structuresMinistry of EducationHarbin Institute of TechnologyHarbin150001China

Benefiting from their large molar extinction coefficient,high carrier mobility,narrow and tunable emissions,inorganic metal halide perovskites(IMHPs) demonstrate great potential in various optoelectrical devices including solar cells,light emitting diodes and photodetectors in the past few *** ions doping,well-known as a modification method of semiconductors,has been extensively applied in IMHPs as *** metal ions have been doped in IMHPs including alkali metals,alkali earth metals,transition metals and lanthanide metals,which either improve their optical performances or induce intriguing brand-new *** them,lanthanide metals feature plentiful energy levels and stable optical properties and are one of the most noteworthy *** we review recent progress in lanthanide ions doped *** summarize Yb,Eu or Er ions singly doping in detail,which was the most investigated species in *** lanthanide ions are also reviewed ***,we introduce lanthanide ions multi-doped IMHPs and at last we put forward several potential development *** the interests in lanthanide ions doped IMHPs rise,researchers have made some achievements in the *** though,there are more unexplored *** there are review articles focusing on metal ions doped IMHPs or lanthanide ions doped perovskites,this review aims to provide an overall introduction of lanthanide ions doped *** review may help researchers learn about lanthanide ions doped IMHPs and is to inspire researchers to make further promotion in this field.

关键词： halide perovskite Lanthanide Doping Rare earths

温度诱导的梯度锡-铅基混合卤素钙钛矿光电探测器

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Science China Materials 2023年第12期66卷 4697-4703页

作者：刘连松曹风人边刘康王孟孙浩轩李亮 School of Physical Science and Technology Center for Energy Conversion Materials&Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China

无机锡(Sn)–铅(Pb)基混合卤素钙钛矿由于其宽的响应波长范围和高的热稳定性,比有机–无机复合铅基卤素钙钛矿更具有吸引力.为了进一步提高Sn–Pb基混合卤素钙钛矿器件的性能,有必要进一步操纵载流子分离和复合.本文提出了一种基于梯度... 详细信息

无机锡(Sn)–铅(Pb)基混合卤素钙钛矿由于其宽的响应波长范围和高的热稳定性,比有机–无机复合铅基卤素钙钛矿更具有吸引力.为了进一步提高Sn–Pb基混合卤素钙钛矿器件的性能,有必要进一步操纵载流子分离和复合.本文提出了一种基于梯度无机CsPb_(0.7)Sn_(0.3)I3的自驱动光电探测器.通过调节退火温度优化CsPb_(0.7)Sn_(0.3)I3基钙钛矿膜中Sn和Pb梯度分布的程度,最终,最优的梯度钙钛矿器件表现出高的响应度(0.18 A W^(−1)),大的比探测率(2.5×10^(12)Jones),和快的响应速率(58.9/42μs),与之前报道的大多数Sn–Pb混合或纯Sn钙钛矿光电探测器性能相当.器件性能的提高主要归因于梯度分布诱导的能带弯曲促进了光生载流子的分离和传输.

关键词： tin-lead halide perovskite gradient photodetector

Time-Resolved Spectroscopy for the Study of perovskite

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Chinese Journal of Electronics 2022年第6期31卷 1053-1071页

作者： SHEN Tangyao ZHAN Yiqiang SHI Lei Physics Department Fudan University School of Information Science and Technology Fudan University

Carrier behavior in halide perovskite is a critical factor impacting on the properties of material, and finally determines the performance of perovskite photovoltaic and luminescent devices. It is necessary to clarify the mechanism of carrier relaxation and migration at extremely microscopic time scale. Time-resolved spectroscopy provides a powerful means for the detection of ultrafast processes, which has been an indispensable technique in research on perovskites. In this review, we will elaborate the basic principle and system implementation of time-resolved spectroscopy, and introduce the applications for carrier dynamics in perovskite.

关键词： carrier relaxation critical factor extremely microscopic time scale carrier behavior halide perovskite perovskite photovoltaic devices time-resolved spectroscopy time resolved spectra luminescent devices photoluminescence high-speed optical techniques

Omnidirectional annealing process for scalable perovskite films

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International Journal of Minerals,Metallurgy and Materials 2022年第8期29卷 1491-1492页

作者： Bo Cheng Dong Wang Qianqian Chu Liang Chu State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals School of Materials Science and EngineeringLanzhou University of Tech-nologyLanzhou 730050China Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

halide perovskites are promising photovoltaic materials due to the outstanding photoelectric properties and low-cost solution pro-cess;however,the low scalability and reproducibility of perovskite films hinder the *** medium annealing(LMA)method has provided a robust liquid environment and an omnidirectional heating field to modulate the growth of perovskite films for high quality with low defect density,desirable stoichiometry,high homogeneity,and less environmental *** fabricated perovskite solar cells exhibited excellent reproducibility and power conversion efficiencies exceeding 24.04%with 0.08 cm^(2) area and 23.15%with 1 cm^(2) area.

关键词： halide perovskite scalable and reproducible fabrication liquid medium annealing

perovskite nanocrystals:synthesis,properties and applications

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Science Bulletin 2017年第5期62卷 369-380页

作者： Pengfei Fu Qingsong Shan Yuequn Shang Jizhong Song Haibo Zeng Zhijun Ning Jinkang Gong Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Institute of Optoelectronics & Nanomaterials Jiangsu Key Laboratory of Advanced Micro & Nano Materials and TechnologyCollege of Material Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China

halide perovskites have emerged as superstar materials for optoelectronic devices. Besides the fever of research in solar cells, these materials show great promise on light emitting diodes(LEDs), photodetectors and lasers as well. Rapid advances in bulk perovskite materials aroused universal interest for the development of perovskite nanocrystals, inspired by the great progress of classic colloidal semiconductor quantum dots. perovskite nanocrystals have been synthesized based on solution process and exhibited high luminescence quantum yield, sharp emission peak, and emission color tunability. Significant progresses have been made about the application of perovskite nanocrystals for LED and lasers in recent years. In this paper, we will comprehensively introduce the synthesis strategies, physical and chemical characteristics, as well as their applications in optoelectronic devices.

关键词： halide perovskite Nanocrystals Light emitting diode Laser

Predictably synthesizing a library of white-light-emitting perovskites

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Science China Chemistry 2023年第3期66卷 760-767页

作者： Ludan Niu Lili Zhao Deyu Li Qian Chen Mingming Zhang Jing Luan Lei Wang Weigao Xu Jun Xing Key Laboratory of Eco-chemical Engineering Ministry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science&TechnologyQingdao 266042China Key Laboratory of Mesoscopic Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China School of Materials Science and Technology Qingdao University of Science&TechnologyQingdao 266042China Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

The low-dimensional organic-inorganic halide perovskites with self-trapped exciton emission have promising prospects for single-phase white-light emitters. However, so far, these broadband white-light-emitting(BWLE) perovskites were synthesized by trial-and-error testing spacing molecules. Here, we developed a steric hindrance regulation strategy to predictably synthesize BWLE perovskites. The molecules containing C–C(–NH_(2))–C groups were introduced into low-dimensional perovskites, which brings a large steric hindrance in-plane orientation. The bigger C–C(–NH_(2))–C bond angle would induce larger structural distortion in perovskites, which leads to the higher rate of self-trapping of excitons and the deeper self-trapping depth. The photoluminescence spectra of the synthesized perovskites can cover the cool-to-warm white light region. Overall, we fabricated a material library consisting of 40 kinds of BWLE compounds according to this strategy. Our findings develop a general strategy to synthesize BWLE perovskites and offer a material platform for optoelectronic applications.

关键词： white-light emission halide perovskite steric hindrance two-dimensional

Ligand-free CsPbBr_(3) with calliandra-like nanostructure for efficient artificial photosynthesis

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Journal of Energy Chemistry 2023年第2期77卷 317-325,I0009页

作者： Yan-Fei Mu Hui-Ling Liu Meng-Ran Zhang Hong-Juan Wang Min Zhang Tong-Bu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009JiangsuChina

The low-efficiency CO_(2) uptake capacity and insufficient photogenerated exciton dissociation of current metal halide perovskite(MHP)nanocrystals with end-capping ligands extremely restrict their application in the field of artificial ***,we demonstrate that ligand-free CsPbBr_(3) with calliandralike nanostructure(LF-CPB CL)can be synthesized easily through a ligand-free seed-assisted dissolutionrecrystallization growth process,exhibiting significantly enhanced CO_(2) uptake *** specifically,the abundant surface bromine(Br)vacancies in ligand-free MHP materials are demonstrated to be beneficial to photogenerated carrier *** electron consumption rate of LF-CPB CL for photocatalytic CO_(2) reduction increases 7 and 20 times over those of traditional ligand-capping CsPbBr_(3)nanocrystal(L-CPB NC)and bulk CsPbBr_(3),***,the absence of ligand hindrance can facilitate the interfacial electronic coupling between LF-CPB CL and tetra(4-carboxyphenyl)porphyrin iron(Ⅲ)chloride(Fe-TCPP)cocatalyst,bringing forth significantly accelerated interfacial charge *** LF-CPB CL/Fe-TCPP exhibits a total electron consumption rate of 145.6μmol g^(-1) h^(-1) for CO_(2)photoreduction coupled with water oxidation which is over 14 times higher than that of L-CPB NC/FeTCPP.

关键词： Artificial photosynthesis Charge separation halide perovskite Ligand-free Vacancy defect