Controlled Homoepitaxial Growth of Hybrid Perovskites

Yusheng Lei; Yimu Chen; Yue Gu; Chunfeng Wang; Zhenlong Huang; Haoliang Qian; Jiuyuan Nie; Geoff Hollett; Woojin Choi; Yugang Yu; NamHeon Kim; Chonghe Wang; Tianjiao Zhang; Hongjie Hu; Yunxi Zhang; Xiaoshi Li; Yang Li; Wanjun Shi; Zhaowei Liu; Michael J. Sailor; Lin Dong; Yu‐Hwa Lo; Jian Luo; Sheng Xu

Index: 10.1002/adma.201705992

Full Text: HTML

Abstract

Organic–inorganic hybrid perovskites have demonstrated tremendous potential for the next‐generation electronic and optoelectronic devices due to their remarkable carrier dynamics. Current studies are focusing on polycrystals, since controlled growth of device compatible single crystals is extremely challenging. Here, the first chemical epitaxial growth of single crystal CH3NH3PbBr3 with controlled locations, morphologies, and orientations, using combined strategies of advanced microfabrication, homoepitaxy, and low temperature solution method is reported. The growth is found to follow a layer‐by‐layer model. A light emitting diode array, with each CH3NH3PbBr3 crystal as a single pixel, with enhanced quantum efficiencies than its polycrystalline counterparts is demonstrated.