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High‐Performance Color‐Tunable Perovskite Light Emitting Devices through Structural Modulation from Bulk to Layered Film
Author(s) -
Chen Ziming,
Zhang Chongyang,
Jiang XiaoFang,
Liu Meiyue,
Xia Ruoxi,
Shi Tingting,
Chen Dongcheng,
Xue Qifan,
Zhao YuJun,
Su Shijian,
Yip HinLap,
Cao Yong
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201603157
Subject(s) - materials science , passivation , electroluminescence , photoluminescence , perovskite (structure) , optoelectronics , modulation (music) , phase (matter) , quantum efficiency , green light , chemical engineering , nanotechnology , blue light , layer (electronics) , organic chemistry , philosophy , chemistry , engineering , aesthetics
Adding 2‐phenoxyethylamine (POEA) into a CH 3 NH 3 PbBr 3 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 CH 3 NH 3 PbBr 3 phase, leading to an improvement of the external quantum efficiency to nearly 3% in CH 3 NH 3 PbBr 3 LED.