Organometal Halide Perovskite Quantum Dot Light-Emitting Diodes

被引:263
作者
Deng, Wei [1 ]
Xu, Xiuzhen [1 ]
Zhang, Xiujuan [1 ]
Zhang, Yedong [1 ]
Jin, Xiangcheng [1 ]
Wang, Liang [1 ]
Lee, Shuit-Tong [1 ]
Jie, Jiansheng [1 ]
机构
[1] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
SOLAR-CELLS; EFFICIENT; NANOCRYSTALS;
D O I
10.1002/adfm.201601054
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Organometal halide perovskites quantum dots (OHP-QDs) with bright, color-tunable, and narrow-band photoluminescence have significant advantages in display, lighting, and laser applications. Due to sparse concentrations and difficulties in the enrichment of OHP-QDs, production of large-area uniform films of OHP-QDs is a challenging task, which largely impedes their use in electroluminescence devices. Here, a simple dip-coating method has been reported to effectively fabricate large-area uniform films of OHP-QDs. Using this technique, multicolor OHP-QDs light-emitting diodes (OQ-LEDs) emitting in blue, blue-green, green, orange, and red color have been successfully produced by simply tuning the halide composition or size of QDs. The blue, green, and red OQ-LEDs exhibited, respectively, a maximum luminance of 2673, 2398, and 986 cd m(-2) at a current efficiency of 4.01, 3.72, and 1.52 cd A(-1), and an external quantum efficiency of 1.38%, 1.06%, and 0.53%, which are much better than most LEDs based on OHP films. The packaged OQ-LEDs show long-term stability in air (humidity approximate to 50%) for at least 7 d. The results demonstrate the great potential of the dip-coating method to fabricate large-area uniform films for various QDs. The high-efficiency OQ-LEDs also demonstrate the promising potential of OHP-QDs for low-cost display, lighting, and optical communication applications.
引用
收藏
页码:4797 / 4802
页数:6
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