Shape-Evolution Control of hybrid perovskite CH3NH3PbI3 crystals via solvothermal synthesis
Shape-Evolution Control of hybrid perovskite CH3NH3PbI3 crystals via solvothermal synthesis
复制标题
通过溶剂热合成控制杂化钙钛矿 CH3NH3PbI3 晶体的形状演化
DOI：
10.1016/j.jcrysgro.2016.12.014
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发表时间：
2017-02-01
影响因子：
1.8
通讯作者：
Zheng, Youdou
中科院分区：
文献类型：
--
作者：
Zhang, Baohua;Guo, Fuqiang;Zheng, Youdou
采用溶剂热法系统地合成了CH3NH3PbI3晶体，并对前驱体浓度、温度、时间、铅源等反应条件进行了综合考察，得到了形状可控的CH3NH3PbI3晶体。结果表明：CH3NH3PbI3晶体呈四方相，晶体由纳米颗粒变为跳跃面长方体；不同铅源下晶体的光致发光光谱由于晶体中存在缺陷而出现蓝移，且峰值强度对铅源非常敏感。此外，晶体生长过程中出现的杂质（不需要的副产品和过量的成分，如HI或CH3NH2）会导致漏斗生长。
We systematically synthesized CH3NH3PbI3 crystals using solvothermal process, and the reaction conditions such as concentration of the precursor, temperature, time, and lead source have been comprehensively investigated to obtain shape-controlled CH3NH3PbI3 crystals. The results showed that the CH3NH3PbI3 crystals exhibit tetragonal phase and the crystals change from nanoparticles to hopper-faced cuboids. Photoluminescence spectra of the crystals obtained with different lead sources show a blue shift due to the presence of defects in the crystals, and the peak intensity is very sensitive to the lead sources. Moreover, impurities (undesirable byproducts and excess components like HI or CH3NH2) presented during crystal growth can result in hopper growth.