Perovskite Quantum Dots Based Lasing-Prospects and Challenges

Since the first report of stimulated emission (SE) and lasing action from colloidal perovskite quantum dots (Pe-QDs) in 2015, Pe-QDs have made great strides in constructing high-performance optically pumped lasers. By virtue of the quantum confinement effect and merits of halide perovskites, the Pe-QDs hold the promise for developing practical and cost-effective lasers based on optical pumping and even electrical injection. In this Chapter, the status and prospects of Pe-QD lasers are introduced. First of all, we present the basic photophysics of Pe-QDs that benefits light emission and SE. Then, the underlying gain mechanisms are discussed. We comprehensively introduce the emerging kinds of Pe-QD lasers based on various high-quality optical resonators. At last, we point out the existing challenges toward the development of high-performance lasers utilizing the Pe-QDs and research trends of Pe-QD lasers in the future.