Defect-modulated synthesis and optoelectronic properties in chemical vapor deposited CsPbBr_(3) microplates
作者机构：School of MicroelectronicsDalian University of TechnologyDalian 116024China Key Laboratory of Materials Modification by LaserIonand Electron Beams(Ministry of Education)School of PhysicsDalian University of TechnologyDalian 116024China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2024年第17卷第5期
页 面：4610-4615页
核心收录：
学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 070303[理学-有机化学] 0703[理学-化学] 0702[理学-物理学]
基 金：supported by the National Natural Science Foundation of China(Nos.11804042,62004022) the China Postdoctoral Science Foundation(No.2023M730479)
主 题：halide perovskites nanomaterials optoelectronics scanning photocurrent microscope chemical vapor deposition
摘 要：The remarkable optoelectronic features of halide perovskite promote their potential applications in semiconductor devices beyond solar cells,which require high-quality single crystals with controlled defect ***,we investigated the synthesis mechanism of chemical vapor deposited single-crystalline all-inorganic perovskite microplates(MPs),and reported a defect-modulated photocurrent which is closely related to the growth sequence of the *** MP synthesis initiates from island-like nano-disks,and subsequently transits to a layer-by-layer fashion,resulting in a defect-rich area at the center of the *** elevated temperatures,these central defects may be thermally activated and become highly mobile,leading to photoluminescence quenching and degression of local and overall optoelectronic attributes,as evidenced by the spatial resolved optical and electrical scanning probe ***,this work shines light on the formation,proliferation and dynamics of defects in perovskites,and offers guidance for preparation of high-quality perovskites micro-crystals for functional semiconductor devices with high temperature stability.
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