Research progress of low-dimensional metal halide perovskites for lasing applications
Liu Zhen1, 2, Li Chun1, Shang Qiu-Yu1, Zhao Li-Yun1, Zhong Yang-Guang1, Gao Yan1, Du Wen-Na3, Mi Yang3, Chen Jie3, Zhang Shuai3, Liu Xin-Feng3, Fu Ying-Shuang2, †, Zhang Qing1, ‡
       

(color online) (a) Schematic of perovskite NW F–P cavity laser (upper panel); bright-field optical, spontaneous emission, and lasing images of single CH3NH3PbI3 NWs (middle panel); lasing spectra of single CH3NH3PbI3 NWs (bottom panel).[60] (b) Optical image of CH3NH3PbI3 NWs grown on silicon substrate (upper panel) and lasing spectra of CH3NH3PbI3, CH3NH3PbBr3, and CH3NH3PbIxCl3−x (lower panel).[61] The excitation power is 20 μJ·cm−2, 60 μJ·cm−2, and 11 μJ·cm−2, respectively. (c) SEM images of CsPbBr3 NWs and NPs grown on quartz substrate (upper panel), and power-dependent emission spectra of CsPbBr3 NWs (lower panel).[62] (d) Lasing images of CsPbBr3 NWs directionally grown on sapphire substrate above the lasing threshold (upper panel), and wide range lasing spectra from the directional CsPbX3 and alloy NWs (lower panel).[63]