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) Picture of CsPbX3 QD in a solution of toluene, which is excited by an ultraviolet lamp; the corresponding PL spectra are the shown in the bottom (left panel). Pump intensity-dependent PL spectra from CsPbBr3 nanocrystal film (right panel), with inset showing transmission electron microscopy of CsPbBr3 nanocrystals.[45,68,69] (b) Power-dependent PL spectra from a thin film of CsPbBr3 QDs, with the inset showing the fabrication of the device, including the excitation beam (EB), cylindrical lens (CL), collection lens set (CLS), and charged coupled device (CCD) (left panel). The integrated PL intensity and FWHM versus pump intensity exhibits a threshold behavior.[69] (c) Power-dependent MAPbI3 perovskite-coated microsphere emission at 80 K, with the inset showing the device’s schematic.[71] (d) Evolution from PL to ASE with increasing pump intensity in a silicon-microsphere resonator embedded with a CsPbBr3 QD.[73]