Amplified spontaneous emission from waveguides based on hybrid quasi-2D perovskites of Dion–Jacobson and Ruddlesden–Popper phases

Morphology optimized quasi-2D perovskite films are fabricated through a strategy of hybrid Dion–Jacobson and Ruddlesden–Popper phases, resulting in good amplified spontaneous emission performance with a low threshold and high gain coefficient.