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

被引：0
作者：
Zijun Wang
Xiaoqiang Xu
Lin Gao
Xingwu Yan
Lu Li
Junsheng Yu
机构：
[1] Chongqing University of Arts and Sciences,Research Institute for New Materials Technology
[2] University of Electronic Science and Technology of China (UESTC),State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering
来源：
Nanoscale Research Letters | 2020年 / 15卷
关键词：
Quasi-2D perovskite; Perovskite light-emitting diodes; PVP; Morphology control; Repeatability;
D O I：
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摘要：
In this work, we fabricate poly(vinylpyrrolidone) (PVP)-treated Ruddlesden-Popper two-dimensional (quasi-2D) PPA2(CsPbBr3)2PbBr4 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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