Amplified spontaneous emission and random lasing using CsPbBr3 quantum dot glass through controlling crystallization

Abstract

By increasing the heat treatment temperature, the average size of CsPbBr₃ quantum dots (QDs) in the glass matrix was increased, which contributed to a 5.5 fold increase of the optical gain coefficients. And the corresponding lasing threshold decreased from 0.752 mJ cm⁻² to 0.138 mJ cm⁻².