Green light-emitting diodes based on hybrid perovskite films with mixed cesium and methylammonium cations

• DOI: 10.1007/s12274-017-1432-7
• Publication Date: 2017-02-20T14:16:39Z
• Authors: Junjie Si; Yang Liu; Nana Wang; Meng Xu; Jing Li; Haiping He; Jianpu Wang; Yizheng Jin
• Keywords: Caesium; Quantum Efficiency; Green-light

We report the formation of high-quality Cs0.4MA0.6PbBr3 thin films with nearly full surface coverage and good emission properties upon the introduction of Cs+ into perovskite crystals. The Cs0.4MA0.6PbBr3 thin films were applied as emissive layers in light-emitting diodes. A maximum external quantum efficiency of ~2.0% was achieved for these green-emitting devices.