Pressure-induced emission of cesium lead halide perovskite nanocrystals.

ABSTRACT: Metal halide perovskites (MHPs) are of great interest for optoelectronics because of their high quantum efficiency in solar cells and light-emitting devices. However, exploring an effective strategy to further improve their optical activities remains a considerable challenge. Here, we report that nanocrystals (NCs) of the initially nonfluorescent zero-dimensional (0D) cesium lead halide perovskite Cs₄PbBr₆ exhibit a distinct emission under a high pressure of 3.01 GPa. Subsequently, the emission intensity of Cs₄PbBr₆ NCs experiences a significant increase upon further compression. Joint experimental and theoretical analyses indicate that such pressure-induced emission (PIE) may be ascribed to the enhanced optical activity and the increased binding

SUBMITTER: Ma Z 

PROVIDER: S-EPMC6206024 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature