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张晓宏教授、陈先凯教授、王凯副教授及其合作者在Nat. Commun.上发表论文
发布时间:2024-04-23 点击:10

题目:

Efficient, narrow-band, and stable electroluminescence from organoboron-nitrogen-carbonyl emitter

作者:

Ying-Chun Cheng1#, Xun Tang2#, Kai Wang1,3*, Xin Xiong1, Xiao-Chun Fan1, Shulin Luo1, Rajat Walia1, Yue Xie1, Tao Zhang1, Dandan Zhang1, Jia Yu1,4, Xian-Kai Chen1*, Chihaya Adachi2,5*, and Xiao-Hong Zhang1,4*

单位:

1Institute of Functional Nano & Soft Materials (FUNSOM), Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, Jiangsu, 215123, P.R.China.

2Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan.

3Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, 215123, Jiangsu, PR China

4Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, 215123, Jiangsu, PR China

5International Institute for Carbon-Neutral Energy Research (I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.

摘要:

Organic light-emitting diodes (OLEDs) exploiting simple binary emissive layers (EMLs) blending only emitters and hosts have natural advantages in low-cost commercialization. However, previously reported OLEDs based on binary EMLs hardly simultaneously achieved desired comprehensive performances, e.g., high efficiency, low efficiency roll-off, narrow emission bands, and high operation stability. Here, we report a molecular-design strategy. Such a strategy leads to a fast reverse intersystem crossing rate in our designed emitterh-BNCO-1 of 1.79×105s−1. An OLED exploiting a binary EML withh-BNCO-1 achieves ultrapure emission, a maximum external quantum efficiency of over 40% and a mild roll-off of 14% at 1000cd·m−2. Moreover,h-BNCO-1 also exhibits promising operational stability in an alternative OLED exploiting a compact binary EML (the lifetime reaching 95% of the initial luminance at 1000cdm−2is ~ 137h). Here, our work has thus provided a molecular-design strategy for OLEDs with promising comprehensive performance.

影响因子:

17.694

分区情况:

一区

链接:

https://www.nature.com/articles/s41467-024-44981-1



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