Quantum confinement effect of two-dimensional all-inorganic halide perovskites

作     者：蔡波 李晓明 顾宇 Moussab Harb 李建海 谢美秋 曹菲 宋继中 张胜利 Luigi Cavallo 曾海波 

作者机构：MIIT Key Laboratory of Advanced Display Materials and DevicesInstitute of Optoelectronics & NanomaterialsCollege of Materials Science and EngineeringNanjing University of Science and Technology King Abdullah University of Science and Technology (KAUST)KAUST Catalysis Center (KCC)Physical Sciences and Engineering Division (PSE) 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2017年第60卷第9期

页      面：811-818页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China (2014CB931702) the National Key Research and Development Program of China (2016YFB0401701) the National Natural Science Foundation of China (NSFC 51572128 and 21403109) NSFC-RGC (5151101197) the Natural Science Foundation of Jiangsu Province (BK20160827) China Postdoctoral Science Foundation (2016M590455) the Fundamental Research Funds for the Central Universities (30915012205 and 30916015106) the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) 

主　　题：quantum confinement effect all-inorganic halide perovskites nanoplates temperature dependence luminescence 

摘      要：Quantum confinement effect（QCE）, an essential physical phenomenon of semiconductors when the size becomes comparable to the exciton Bohr radius, typically results in quite different physical properties of low-dimensional materials from their bulk counterparts and can be exploited to enhance the device performance in various optoelectronic applications. Here, taking Cs Pb Br3 as an example, we reported QCE in all-inorganic halide perovskite in two-dimensional（2D） nanoplates. Blue shifts in optical absorption and photoluminescence spectra were found to be stronger in thinner nanoplates than that in thicker nanoplates, whose thickness lowered below -7 nm. The exciton binding energy results showed similar trend as that obtained for the optical absorption and photoluminescence. Meanwile, the function of integrated intensity and full width at half maximum and temperature also showed similar results, further supporting our conclusions. The results displayed the QCE in all-inorganic halide perovskite nanoplates and helped to design the all-inorganic halide perovskites with desired optical properties.