Preferential Facet Growth of Methylammonium Lead Halide Single Crystals Promoted by Halide Coordination
Preferential Facet Growth of Methylammonium Lead Halide Single Crystals Promoted by Halide Coordination
复制标题
卤化物配位促进甲基铵卤化铅单晶的优先面生长
DOI：
10.1246/cl.160419
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发表时间：
2016-08-05
影响因子：
1.6
通讯作者：
Mi, Qixi
中科院分区：
文献类型：
--
作者：
Zhang, Yi;Huang, Fuqiang;Mi, Qixi
钙钛矿型太阳电池采用溶液法制备的CH3NH3PbI3薄膜作为有源层材料，其表面形貌和外露面型直接影响器件的效率和稳定性。我们研究了从溶液中生长CH3NH3PbX3(X=BrI)晶体的各种条件，发现溴化物、非水溶剂和较高的X−/PbX2比有利于长方体在十二面体上的生长。我们认为，这些因素促进了X−与Pb2+在生长表面的配位，从而使{110}c面长大超过了{100}c面。
Perovskite solar cells utilize solution-processed CH3NH3PbI3 thin films as the active layer material, whose morphology and exposed facets directly contribute to the device efficiency and stability. We investigated various conditions for growing CH3NH3PbX3 (X = Br, I) crystals from solutions, and found that bromide, nonaqueous solvents, and higher X−/PbX2 ratios favor the growth of cuboids over dodecahedra. We propose that these factors promote the coordination of X− to Pb2+ on the growing surfaces, thus making the {110}c faces outgrow the {100}c faces.