Abstract:Lead halide perovskite quantum dots (QDs) are a promising material for light amplification devices. In order to improve their optical gain threshold and lifetime, it is essential to understand the underlying gain mechanism. However, there is still debate on the nature of gain in perovskite QDs, which has been attributed to different origins such as biexcitons, trions, and single excitons. Here we study amplified spontaneous emission and optical gain of monodisperse spherical CsPbBr 3 QDs and conclusively assig… Show more
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