High-Performance Color-Tunable Perovskite Light Emitting Devices through Structural Modulation from Bulk to Layered Film

摘要

Adding 2-phenoxyethylamine (POEA) into a CH3NH3PbBr3 precursor solution can modulate the organic-inorganic hybrid perovskite structure from bulk to layered, with a photoluminescence and electroluminescence shift from green to blue. Meanwhile, POEA can passivate the CH(3)NH(3)PbBr(3)surface and help to obtain a pure CH3NH3PbBr3 phase, leading to an improvement of the external quantum efficiency to nearly 3% in CH3NH3PbBr3 LED.