Towards next generation white LEDs: optics-electronics synergistic effect in a single-layer heterophase halide perovskite

摘要

a Scheme of the WLED structure relying on a synergistic effect of α- and δ-CsPbI3 perovskite heterophases. b Broad electroluminescence spectrum of the WLED; photograph in the inset shows its uniform white emission. c Charge transfer and recombination mechanism operative in the α/δ-CsPbI3 heterophase WLED (STE stays for “self-trapped exciton”)