Quasi-2D Dion-Jacobson phase perovskites as a promising material platform for stable and high-performance lasers
Xue-Zhou Wang, Long Jin, Aleksandr A. Sergeev, Wei Liu, Songyun Gu, Nan Li, Kezhou Fan, Shih‐Chi Chen, Kam Sing Wong, Xiankai Sun, Ni Zhao
Abstract
Metal halide perovskites have shown outstanding optoelectronic and nonlinear optical properties; yet, to realize wafer-scale high-performance perovskite-integrated photonics, the materials also need to have excellent ambient stability and compatibility with nanofabrication processes. In this work, we introduce Dion-Jacobson (D-J) phase perovskites for photonic device applications. By combining self-assembled monolayer-assisted film growth with thermal pressing, we obtain a series of compact and extremely smooth D-J phase perovskite thin films that exhibit excellent stability during electron-beam lithography, solvent development, and rinse. Combining spectroscopic and morphological characterizations, we further demonstrate how organic spacers can be used to fine-tune the photophysical properties and processability of the perovskite films. The distributed-feedback lasers based on the D-J phase perovskites exhibit a low lasing threshold (5.5 μJ cm −2 pumped with nanosecond laser), record high Q factor (up to 30,000), and excellent stability, with an unencapsulated device demonstrating a T 90 beyond 60 hours in ambient conditions (50% relative humidity).