Stable, Room-Temperature, Low-Threshold Amplified Spontaneous Emission from Thermally Evaporated Cesium Lead Halide Perovskites.

ABSTRACT: Semiconductor nanocrystals are widely investigated as tunable quantum emitters due to their composition-, size- and shape-dependent optical properties, and they find applications in various optoelectronic devices, including lasers. However, in compact films, insulating ligands often limit heat and charge transport. Improving the heat management, for example, by removing ligands, can significantly enhance the operational stability at high excitation densities required for laser devices. Here, we report the synthesis, structural characterization, and stable high optical gain of ligand-free nanocrystalline thin films obtained through single-source thermal evaporation of CsPbX₃ (X = Cl, Br). This deposition method is robust, scalable, and compatible with industrial processes. A slow

SUBMITTER: Kominko Y 

PROVIDER: S-EPMC12369004 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature