我组王肖在Advanced Optical Materials上发表论文

题目：

A Bright and Stable Violet Carbon Dot Light-Emitting Diode

作者：

Xiao Wang, Xinyu Zhang, Xiaoqing Gu, Haodong Nie, Mengmeng Zhu, Bo Wang, Jin Gao, Yichen Tao, Yizhi Zhu, Hui Huang, Chunxiang Xu, Mingwang Shao, Yang Liu,* Liangsheng Liao,* and Zhenhui Kang*

单位：

 †Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials

(FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou 215123, Jiangsu, People’s Republic of China

Y. Z. Zhu, Prof. C. X. Xu State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Nanjing 210096, China

摘要：

Violet light-emitting diodes (LEDs) with emission at 400 nm are very important for solid-state lighting, high-density information storage, display technology, and biology medical treatment. Wide band-gap semiconductors and/or the semiconductor quantum dots (QDs), typically based on heavy metals such as cadmium and lead, are promising candidates for the violet LEDs, but so far these have had external quantum efficiencies (EQEs) lower than 0.31% (luminance 147.6 cd cm−2; 410 nm). Herein, violet light-emitting materials and the violet LED devices based on carbon dots (CDots) are presented. The CDots have absolute photoluminescence quantum yield of 23.9% and produce two-narrow-peak emission at 382 and 401 nm with narrow full-width at half-maximum about 30nm, respectively. The violet LEDs based on these CDots display high performance with a maximum luminance of 163 cd m−2 (electroluminescence peak located at 408 nm; Commission International de I'Eclairage color coordinate (0.180, 0.121)) and high EQE of 0.831%, exceeding that of previously reported semiconductor QDs-based violet LEDs. Moreover, these CDots-based violet LEDs have a high current efficiency of 0.62 cd A−1 , a long lifetime (T50, 50 h), as well as a low turn-on voltage of 3.7 V.

影响因子：

8.286

分区情况：

1区

链接：  

https://doi.org/10.1002/adom.202000239