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Published on: September 8, 2017
High-Performance Color-Tunable Perovskite Light Emitting Devices through Structural Modulation from Bulk to Layered
Ziming Chen1, Chongyang Zhang1, Xiao-Fang Jiang1
1State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices, School of Materials Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China.
Abstract:
Adding 2-phenoxyethylamine (POEA) into a CH3 NH3 PbBr3 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 CH3 NH3 PbBr3 surface and help to obtain a pure CH3 NH3 PbBr3 phase, leading to an improvement of the external quantum efficiency to nearly 3% in CH3 NH3 PbBr3 LED.
