Electrically-Driven Violet Light-Emitting Devices Based on Highly Stable Lead-Free Perovskite Cs3Sb2Br9 Quantum Dots

被引：222

作者：

Ma, Zhuangzhuang ^{[1
]}

Shi, Zhifeng ^{[1
]}

Yang, Dongwen ^{[1
]}

Zhang, Fei ^{[1
]}

Li, Sen ^{[1
]}

Wang, Lintao ^{[1
]}

Wu, Di ^{[1
]}

Zhang, Yuantao ^{[2
]}

Na, Guangren ^{[3
,4
]}

Zhang, Lijun ^{[3
,4
]}

Li, Xinjian ^{[1
]}

Zhang, Yu ^{[2
]}

Shan, Chongxin ^{[1
,5
]}

机构：

[1] Zhengzhou Univ, Dept Phys & Engn, Key Lab Mat Phys, Minist Educ, Daxue Rd 75, Zhengzhou 450052, Peoples R China

[2] Jilin Univ, State Key Lab Integrated Optoelect, Coll Elect Sci & Engn, Qianjin St 2699, Changchun 130012, Peoples R China

[3] Jilin Univ, State Key Lab Superhard Mat, Key Lab Automobile Mat MOE, Qianjin St 2699, Changchun 130012, Peoples R China

[4] Jilin Univ, Coll Mat Sci & Engn, Qianjin St 2699, Changchun 130012, Peoples R China

[5] Chinese Acad Sci, State Key Lab Luminescence & Applicat, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China

来源：

ACS ENERGY LETTERS | 2020年 / 5卷 / 02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：

ORGANOMETAL TRIHALIDE PEROVSKITE; HALIDE PEROVSKITES; HIGH-EFFICIENCY; DIODES; NANOCRYSTALS; ELECTROLUMINESCENCE; EMISSION; BR; VOLTAGE; CSPBX3;

D O I：

10.1021/acsenergylett.9b02096

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：

Recently, substantial progress has been made in perovskite-based light-emitting devices (LEDs) with near-infrared, red, green, and blue emissions. However, short-wavelength perovskite LEDs targeted at violet emission remain a great challenge. Moreover, the majority of previously reported devices were focused on the conventional lead halide perovskites. In this study, for the first time, electrically driven violet emission (408 nm) from lead-free Cs3Sb2Br9 quantum dots (QDs) was demonstrated at room temperature, the shortest wavelength for perovskite LEDs as far as we know, and an external quantum efficiency of similar to 0.206% was achieved. The device demonstrated an excellent working stability. After a long-term running for 6 h, almost 90% of the initial electroluminescence performance was retained, and no current density rising occurred with the running time. The results obtained suggest that the lead-free Cs3Sb2Br9 QDs are potentially attractive candidates for the preparation of environment-friendly and stable violet LEDs, making practical applications of them a real possibility.

引用

页码：385 / 394

页数：19

共 58 条

[31] Localized Surface Plasmon Enhanced All-Inorganic Perovskite Quantum Dot Light-Emitting Diodes Based on Coaxial Core/Shell Heterojunction Architecture [J].