Multidentate Ligand Polyethylenimine Enables Bright Color-Saturated Blue Light-Emitting Diodes Based on CsPbBr3 Nanoplatelets

被引：83

作者：

Yin, Wenxu ^{[1
]}

Li, Mengkai ^{[1
]}

Dong, Wei ^{[1
]}

Luo, Zhao ^{[1
]}

Li, Yanxiu ^{[2
,3
]}

Qan, Jingyu ^{[4
]}

Zhang, Jiaqi ^{[1
]}

Zhang, Wei ^{[1
]}

Zhang, Yu ^{[5
]}

Kershaw, Stephen, V ^{[2
,3
]}

Zhang, Xiaoyu ^{[1
]}

Zheng, Weitao ^{[1
]}

Rogach, Andrey L. ^{[2
,3
]}

机构：

[1] Jilin Univ, Key Lab Automobile Mat, Minist Educ, Coll Mat Sci & Engn,Electron Microscopy Ctr, Changchun 130012, Peoples R China

[2] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong, Peoples R China

[3] City Univ Hong Kong, Ctr Funct Photon CFP, Hong Kong, Peoples R China

[4] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

[5] Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Changchun 130012, Peoples R China

来源：

ACS ENERGY LETTERS | 2021年 / 6卷 / 02期

基金：

中国国家自然科学基金; 美国国家科学基金会; 中国博士后科学基金;

关键词：

CESIUM LEAD HALIDE; PEROVSKITE NANOCRYSTALS; QUANTUM DOTS; DRIVEN TRANSFORMATION; ELECTROLUMINESCENCE; LUMINESCENT; TOLERANCE; CSPBX3; BR; CL;

D O I：

10.1021/acsenergylett.0c02651

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solid-state color-saturated blue emitters are an essential part of light-emitting diodes (LEDs) and high-definition displays, and lead halide perovskite nanomaterials are one such type of emitter. Using a multidentate ligand polyethylenimine (PEI), we developed a soft template method to stabilize and enhance solid-state blue photoluminescence of CsPbBr3 nanoplatelets, whose lateral size became significantly increased without changing the thickness. From the spectral analysis, the PEI soft template prevented the coalescence of the CsPbBr3 nanoplatelets and decreased the density of their trap states, leading to a high photoluminescence quantum yield of 85% for their color-saturated blue emission in solution and 40% in films. LEDs based on CsPbBr3 nanoplatelets emit blue light at 465 nm with a high brightness of 631 cd m(-2).

引用

页码：477 / 484

页数：8

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