Metal Halide Perovskites for Laser Applications

TLDR

Metal halide perovskites have attracted attention in optoelectronics, especially for lasers, due to their large absorption, low defect density, high mobility, long diffusion length, high photoluminescence quantum yield, and low Auger recombination, yet electrically pumped lasers remain unrealized. The authors aim to accelerate perovskite laser development by elucidating the fundamental photophysical characteristics of perovskite gain materials. They discuss the structure and gain behavior of various perovskite materials, analyze how charge carrier dynamics and electron–phonon interactions affect population inversion, and highlight recent advances in perovskite lasers. They present a perspective on perovskite material design and outline the remaining challenges for perovskite lasers.

Abstract

Abstract Metal halide perovskites have drawn tremendous attention in optoelectronic applications owing to the rapid development in photovoltaic and light‐emitting diode devices. More recently, these materials are demonstrated as excellent gain media for laser applications due to their large absorption coefficient, low defect density, high charge carrier mobility, long carrier diffusion length, high photoluminescence quantum yield, and low Auger recombination rate. Despite the great progress in laser applications, the development of perovskite lasers is still in its infancy and the realization of electrically pumped lasers has not yet been demonstrated. To accelerate the development of perovskite‐based lasers, it is important to understand the fundamental photophysical characteristics of perovskite gain materials. Here, the structure and gain behavior in various perovskite materials are discussed. Then, the effects of charge carrier dynamics and electron–phonon interaction on population inversion in different types of perovskite materials are analyzed. Further, recent advances in perovskite‐based lasers are also highlighted. Finally, a perspective on perovskite material design is presented and the remaining challenges of perovskite lasers are discussed.