Li Fangtao, Lu Junfeng, Zhang Qinglin, Peng Dengfeng, Yang Zheng, Xu Qian, Pan Caofeng, Pan Anlian, Li Tianfeng, Wang Rongming
Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China; CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China.
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China; School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
Sci Bull (Beijing). 2019 May 30;64(10):698-704. doi: 10.1016/j.scib.2019.04.016. Epub 2019 Apr 10.
As a direct bandgap semiconductor, organic-inorganic lead halide perovskite (MAPbX, MA = CHNH, X = Cl, Br, I) have been considered as promising materials for laser due to their excellent optoelectronic properties. The perovskite materials with 1D and 2D shapes were widely prepared and studied for Fabry-Pérot mode and whispering-gallery-mode (WGM) microcavities, but cuboid-shape is rarely reported. In this work, we successfully fabricated single crystal cuboid-shaped MAPbBr perovskite with different morphologies, named microcuboid-MAPbBr (M-MAPbBr) and multi-step-MAPbBr (MS-MAPbBr), via solvothermal method. Furthermore, the as-prepared crystals' excitonic recombination lifetime under different pumping energy density was studied by time-resolved photoluminescence (TRPL). Based on controllable morphology and remarkable lasing properties, these cuboid shaped single crystal perovskite could be a promising candidate for small laser, and other optoelectronic devices.
作为一种直接带隙半导体，有机-无机卤化铅钙钛矿（MAPbX，MA = CH₃NH₃，X = Cl、Br、I）因其优异的光电性能而被视为有前途的激光材料。具有一维和二维形状的钙钛矿材料被广泛制备并用于研究法布里-珀罗模式和回音壁模式（WGM）微腔，但很少报道长方体形状的。在这项工作中，我们通过溶剂热法成功制备了具有不同形貌的单晶长方体形状的MAPbBr钙钛矿，分别命名为微长方体-MAPbBr（M-MAPbBr）和多步-MAPbBr（MS-MAPbBr）。此外，通过时间分辨光致发光（TRPL）研究了所制备晶体在不同泵浦能量密度下的激子复合寿命。基于可控的形貌和显著的激光特性，这些长方体形状的单晶钙钛矿有望成为小型激光器和其他光电器件的候选材料。
