Morphology control towards bright and stable inorganic halide perovskite light-emitting diodes

被引：36
作者：
Jin, Fangming [1 ]
Zhao, Bo [2 ,3 ,4 ]
Chu, Bei [1 ]
Zhao, Haifeng [1 ]
Su, Zisheng [1 ,5 ]
Li, Wenlian [1 ]
Zhu, Furong [3 ,4 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, State Key Lab Luminescence & Applicat, Changchun 130033, Jilin, Peoples R China
[2] Taiyuan Univ Technol, Res Ctr Adv Mat Sci & Technol, Key Lab Interface Sci & Engn Adv Mat, Minist Educ, Taiyuan 030024, Shanxi, Peoples R China
[3] Hong Kong Baptist Univ, Inst Adv Mat, Dept Phys, Hong Kong, Hong Kong, Peoples R China
[4] Hong Kong Baptist Univ, Inst Res & Continuing Educ Shenzhen, Hong Kong, Hong Kong, Peoples R China
[5] Quanzhou Normal Univ, Coll Phys & Informat Engn, Quanzhou 362000, Peoples R China
来源：
JOURNAL OF MATERIALS CHEMISTRY C | 2018年 / 6卷 / 06期
基金：
中国国家自然科学基金;
关键词：
SOLAR-CELLS; EFFICIENT; ELECTRON; PERFORMANCE; DEPOSITION; EMISSION; DEVICES; LENGTHS; CSPBX3;
D O I：
10.1039/c7tc04631f
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effect of morphology control on the performance of inorganic cesium lead halide based green perovskite light-emitting diodes (PeLEDs) was analyzed. PeLEDs were prepared using two different formulation approaches: (1) the solution was prepared by dissolving CsPbBr3 powders in dimethyl sulfoxide (DMSO), and (2) the precursor solution was formulated by dissolving CsBr and PbBr2 powders with different molar ratios of CsBr to PbBr2 in DMSO. A peak luminance of 4590 cd m(-2) was obtained for the PeLEDs prepared with CsPbBr3-solution, which is 48 and 12 times higher than that of the optimized PeLEDs fabricated using CsBr/PbBr2 precursor solutions with different molar ratios of CsBr to PbBr2 of 2 : 1 and 1 : 1. Our results reveal that the morphology and control of excess Pb atoms in the perovskite emitting layer play an important role in modulating the current losses and the radiative decay rate, which were optimized in this work for attaining efficient operation of the PeLEDs.
引用
收藏
页码：1573 / 1578
页数：6
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