A Simple Deposition Method for Self-Assembling Single Crystalline Hybrid Perovskite Nanostructures

• 来源期刊: 中国物理快报（英文版）
• 关键词: @@
• 年，卷（期）: 2017,（6）
• 页码范围: 117-120
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/34/6/068103

摘要

A sequential deposition method is developed,where the hybrid organic-inorganic halide perovskite (CH3NH3Pb (I1-xBrx)3) is synthesized using precursor solutions containing CH3NH3I and PbBr2 with different mole ratios and reaction times.The perovskite achieved here is quite stable in the atmosphere for a relatively long time without noticeable degradation,and the perovskite nanowires are proved to be single crystalline structure,based on transmission electron microscopy.Furthermore,strong red photoluminescence from perovskite is observed in the wavelength range from 746nm to 770nm with the increase of the reaction time,on account of the exchanges between I-ions and Br-ions in the perovskite crystal.Lastly,the influences of concentration and reaction time of the precursor solutions are discussed,which are important for evolution of hybrid perovskite from nanocuboid to nanowire and nanosheet.