High-Performance Quasi-2D Perovskite Light-Emitting Diodes Via Poly(vinylpyrrolidone) Treatment

被引：16
作者：
Wang, Zijun [1 ,2 ]
Xu, Xiaoqiang [1 ,2 ]
Gao, Lin [1 ,2 ]
Yan, Xingwu [1 ]
Li, Lu [1 ]
Yu, Junsheng [2 ]
机构：
[1] Chongqing Univ Arts & Sci, Res Inst New Mat Technol, Chongqing 402160, Peoples R China
[2] Univ Elect Sci & Technol China, Sch Optoelect Sci & Engn, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
来源：
NANOSCALE RESEARCH LETTERS | 2020年 / 15卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Quasi-2D perovskite; Perovskite light-emitting diodes; PVP; Morphology control; Repeatability; EFFICIENT; LIGAND; BRIGHT; BLUE; FILM;
D O I：
10.1186/s11671-020-3260-z
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this work, we fabricate poly(vinylpyrrolidone) (PVP)-treated Ruddlesden-Popper two-dimensional (quasi-2D) PPA(2)(CsPbBr3)(2)PbBr4 perovskite light-emitting diodes (PeLEDs) and achieved a peak brightness of 10,700 cd m(-2) and peak current efficiency of 11.68 cd A(-1), threefold and tenfold higher than that of the pristine device (without PVP), respectively. It can be attributed that the additive of PVP can suppress the pinholes of perovskite films owing to the excellent film-forming property, inhibiting the leakage current. Besides, PVP treatment facilitates the formation of compact perovskite films with defect reduction. Our work paves a novel way for the morphology modulation of quasi-2D perovskite films.
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页数：9
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