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

Ziming Chen; Chongyang Zhang; Xiao-Fang Jiang; Meiyue Liu; Ruoxi Xia; Tingting Shi; Dongcheng Chen; Qifan Xue; Yu-Jun Zhao; Shijian Su; Hin-Lap Yip; Yong Cao

doi:10.1002/adma.201603157

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

Adv Mater. 2017 Feb;29(8). doi: 10.1002/adma.201603157. Epub 2016 Dec 21.

Authors

Affiliations

¹ State 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.
² Department of Physics, South China University of Technology, 381 Wushan Road, Guangzhou, 510640, P. R. China.

PMID: 28000969
DOI: 10.1002/adma.201603157

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.

Keywords: blue emitting devices; color tunable; layered structures; organic-inorganic hybrid perovskite LEDs; structure modulation.