【摘 要】
：
Organometal halide perovskites have recently emerged with a huge potential for photovoltaic applica-tions. Moreover, preparation of high-quality perovskite crystals with controlled morphology is of great significance for the fundamental studies such as op
【机 构】
：
Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Eng
论文部分内容阅读
Organometal halide perovskites have recently emerged with a huge potential for photovoltaic applica-tions. Moreover, preparation of high-quality perovskite crystals with controlled morphology is of great significance for the fundamental studies such as optical and electrical properties, as well as the appli-cations. Here, we report a one-pot solvothermal process to synthesize sheet-shaped CH 3 NH 3 PbBr 3 single crystals with the lateral size of 100 μm and the thickness of 3–8 μm. Furthermore, a controlled etch-ing behavior on the crystalline surface was demonstrated, which could be the irregular collapse of the crystalline surface caused by the local accumulation of methylammonium cations. Using this technique, CH 3 NH 3 PbBr 3 single crystal sheets could be used in the various optoelectronic devices, such as nanolaser, optical sensors, photodetectors and field effect transistors.
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