期刊
NANO LETTERS
卷 20, 期 5, 页码 3568-3576出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c00513
关键词
Cs3Cu2I5 nanocrystals; deep-blue; light-emitting diodes; self-trapped excitons; stability
类别
资金
- National Natural Science Foundation of China [61722403, 11674121, 11774318, 61935009]
- Support Program for Scientific and Technological Innovation Talents of Higher Education in Henan Province [19HASTIT017]
- Jilin Province Science and Technology Development Program [20190201016JC]
Currently, the blue perovskite light-emitting diodes (PeLEDs) suffer from a compromise in lead toxicity and poor operation stability, and most previous studies have struggled to meet the crucial blue NTSC standard. In this study, electrically driven deep-blue LEDs (similar to 445 nm) based on zero-dimensional (0D) Cs(3)Cu(2)I(5 )nanocrystals (NCs) were demonstrated with the color coordinates of (0.16, 0.07) and a high external quantum efficiency of similar to 1.12%, comparable with the best-performing blue LEDs based on lead-halide perovskites. Encouraged by the remarkable stability of Cs3Cu2I5 NCs against heat and environmental oxygen/moisture, the proposed device was operated in a continuous current mode for 170 h, producing a record half-lifetime of similar to 108 h. The device stability was further verified by an aggressive thermal cycling test (300-360-300 K) and a 35-day storage test. Together with the eco-friendly features and facile colloidal synthesis technique, the 0D Cs3Cu2I5 NCs can be therefore regarded as a promising candidate for deep-blue LEDs applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据