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

Zijun Wang; Xiaoqiang Xu; Lin Gao; Xingwu Yan; Lu Li; Junsheng Yu

doi:10.1186/s11671-020-3260-z

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

Nanoscale Res Lett. 2020 Feb 4;15(1):34. doi: 10.1186/s11671-020-3260-z.

Authors

Zijun Wang^{1

2}, Xiaoqiang Xu^{1

2}, Lin Gao^{1

2}, Xingwu Yan³, Lu Li⁴, Junsheng Yu²

Affiliations

¹ Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing, 402160, People's Republic of China.
² State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, People's Republic of China.
³ Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing, 402160, People's Republic of China. yan_xing_wu@126.com.
⁴ Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing, 402160, People's Republic of China. lli@cqwu.edu.cn.

Abstract

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.

Keywords: Morphology control; PVP; Perovskite light-emitting diodes; Quasi-2D perovskite; Repeatability.

Abstract

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