Enhanced performance of perovskite light-emitting-diodes based on ionic liquid modified CsPbBr3 nanocrystals

被引：7

作者：

Xu, Yanqiao ^{[1
]}

Chen, Ting ^{[1
,3
]}

Xie, Zhixiang ^{[3
]}

Jiang, Weihui ^{[1
]}

Wang, Lianjun ^{[1
,2
]}

Jiang, Wan ^{[1
,2
]}

Zhang, Xiaojun ^{[1
]}

机构：

[1] Jingdezhen Ceram Inst, Sch Mat Sci & Engn, Jingdezhen 333001, Peoples R China

[2] Donghua Univ, State Key Lab Modificat Chem Fibers & Polymer Mat, Coll Mat Sci & Engn, Shanghai 201620, Peoples R China

[3] Suzhou Univ Sci & Technol, Inst Mat Sci & Devices, Suzhou 215009, Peoples R China

来源：

OPTICAL MATERIALS | 2021年 / 111卷

基金：

中国国家自然科学基金;

关键词：

Perovskite; Nanocrystals; Ionic liquid; Light-emitting diodes; CSPBX3;

D O I：

10.1016/j.optmat.2020.110620

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Perovskite nanocrystals (NCs) are promising materials for light-emitting diodes (LEDs) owing to their unique optoelectrical properties. However, the organic long-chain ligands act as insulating layers on NC surface, causing the low carrier transport capability and poor performance of LEDs. Herein, a novel strategy was proposed to facilitate the carrier transport for enhancing the performance of perovskite light emitting diodes (PeLEDs). Ionic liquid (IL) 1-ethyl-3-methylimidazolium bromide [Emim]Br was introduced into the synthesis process of CsPbBr3 NCs, which could improve the emission intensity of NCs significantly. Furthermore, [Emim]Br also possessed the characteristic that facilitated the transportation of carriers, resulting in the enhancement of external quantum efficiency (EQE) of PeLEDs from 0.38% to 1.03%. These results demonstrate that the novel strategy opens up new avenue for boosting the PeLED performance, which will promote the commercial applications in future highdefinition displays.

引用

页数：4

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