Single-emissive-layer all-perovskite white light-emitting diodes employing segregated mixed halide perovskite crystals.

ABSTRACT: Metal halide perovskites have demonstrated impressive properties for achieving efficient monochromatic light-emitting diodes. However, the development of white perovskite light-emitting diodes (PeLEDs) remains a big challenge. Here, we demonstrate a single-emissive-layer all-perovskite white PeLED using a mixed halide perovskite film as the emissive layer. The perovskite film consists of separated mixed halide perovskite phases with blue and red emissions, which are beneficial for suppressing halide anion exchange and preventing charge transfer. As a result, the white PeLED shows balanced white light emission with Commission Internationale de L'Eclairage coordinates of (0.33, 0.33). In addition, we find that the achievement of white light emission from mixed halide perovskites strongly dep

SUBMITTER: Yu H 

PROVIDER: S-EPMC8162942 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature