Enhanced random lasing action of metal halide perovskites via in-situ AgI diffusion

Abstract

In this work, we will introduce our works on metal halide perovskite thin film random lasers and the latest finding of the enhanced lasing performance via in-situ AgI diffusion in perovskite materials. For the hybrid configuration, optical absorption is found to be evidently increased, indicating the availability of optical pumping fluences is prominently improved. Meanwhile, rugged film morphology and the corresponding chemical reaction are also observed and further investigated. Besides, by conducting a series of temperature-dependent cryogenic and a systematic power-dependent micro-PL measurement with different excitation wavelengths, the relationship in wavelength positions between each other can be validated, confirming the mechanism for the enhancement on light emission performance. Finally, for a such hybrid configuration, the corresponding randomlasing performance is found can be enhanced by a factor of three.