Solution-processed green and blue quantum-dot light-emitting diodes with eliminated charge leakage

被引：361

作者：

Deng, Yunzhou ^{[1
,2
]}

Peng, Feng ^{[3
]}

Lu, Yao ^{[4
]}

Zhu, Xitong ^{[1
]}

Jin, Wangxiao ^{[1
]}

Qiu, Jing ^{[4
]}

Dong, Jiawei ^{[4
]}

Hao, Yanlei ^{[1
]}

Di, Dawei ^{[2
]}

Gao, Yuan ^{[5
]}

Sun, Tulai ^{[6
,7
]}

Zhang, Ming ^{[8
,9
]}

Liu, Feng ^{[8
,9
]}

Wang, Linjun ^{[4
]}

Ying, Lei ^{[3
]}

Huang, Fei ^{[3
]}

Jin, Yizheng ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Chem, Key Lab Excited State Mat Zhejiang Prov, State Key Lab Silicon Mat, Hangzhou, Peoples R China

[2] Zhejiang Univ, Coll Opt Sci & Engn, Int Res Ctr Adv Photon, State Key Lab Modern Opt Instrumentat, Hangzhou, Peoples R China

[3] South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou, Peoples R China

[4] Zhejiang Univ, Dept Chem, Key Lab Excited State Mat Zhejiang Prov, Hangzhou, Peoples R China

[5] Najing Technol Corp Ltd, Hangzhou, Peoples R China

[6] Zhejiang Univ Technol, State Key Lab Breeding Base Green Chem Synth Tech, Ctr Electron Microscopy, Hangzhou, Peoples R China

[7] Zhejiang Univ Technol, Coll Chem Engn, Hangzhou, Peoples R China

[8] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Frontiers Sci Ctr Transformat Mol, In Situ Ctr Phys Sci, Shanghai, Peoples R China

[9] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Ctr Hydrogen Sci, Shanghai, Peoples R China

来源：

NATURE PHOTONICS | 2022年 / 16卷 / 07期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

EFFICIENT; NANOCRYSTALS; ELECTROLUMINESCENCE; TRANSPORT; DEVICES; BRIGHT;

D O I：

10.1038/s41566-022-00999-9

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Quantum-dot light-emitting diodes (QD-LEDs) promise a new generation of efficient, low-cost, large-area and flexible electroluminescent devices. However, the inferior performance of green and blue QD-LEDs compared with their red counterpart is hindering the commercialization of QD-LEDs in display and solid-state lighting applications. Here we demonstrate green and blue QD-LEDs with similar to 100% conversion of the injected charge carriers into emissive excitons. The key to success is the elimination of electron leakage at the organic/inorganic interface by using hole-transport polymers with simultaneous low electron affinity and reduced energetic disorder. Our devices exhibit high external quantum efficiencies over a wide range of luminance values (peak external quantum efficiencies of 28.7% for green and 21.9% for blue) and excellent stability (extrapolated T-95 lifetime is 580,000 h for green and 4,400 h for blue QD-LEDs). We expect our work to provide a general strategy for eliminating charge leakage in solution-processed LEDs featuring organic/inorganic interfaces.

引用

页码：505 / +

页数：9

共 53 条

[51]

Xiao ZG, 2017, NAT PHOTONICS, V11, P108, DOI [10.1038/NPHOTON.2016.269, 10.1038/nphoton.2016.269]

[52]

Yang YX, 2015, NAT PHOTONICS, V9, P259, DOI [10.1038/NPHOTON.2015.36, 10.1038/nphoton.2015.36]

[53]

Yuan MJ, 2016, NAT NANOTECHNOL, V11, P872, DOI [10.1038/NNANO.2016.110, 10.1038/nnano.2016.110]

← 1 2 3 4 5 6 →