Dual-Acceptor Thermally Activated Delayed Fluorescence Emitters: Achieving High Efficiency and Long Lifetime in Orange-Red OLEDs
Dual-Acceptor Thermally Activated Delayed Fluorescence Emitters: Achieving High Efficiency and Long Lifetime in Orange-Red OLEDs
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双受体热激活延迟荧光发射器：实现橙红色 OLED 的高效率和长寿命
DOI：
10.1016/j.cej.2022.134728
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发表时间：
2022-01
影响因子：
15.1
通讯作者：
Wang Ying
中科院分区：
文献类型：
--
作者：
Hu Xiaoxiao;Aizawa Naoya;Kim Mingjun;Huang Miaofei;Li Zhiyi;Liu Guanhao;Gao Honglei;Gao Teng;Dong Xiangyu;Zhang Yong;Liu Jianjun;Wang Pengfei;Yi Yuanping;Pu Yongjin;Wang Ying
有机电致发光器件的效率和寿命对高质量有机电致发光器件的发展至关重要。本文以三苯胺或N-苯基咔唑为供体，以9-H-硫杂环己烷-9-酮-10，10-二氧化物(TXO)为受体，设计了四种由黄到红发射的双受体型热激活延迟荧光(TADF)发射体(DTXO-PhCH2、DTXO-PhCH4、DTXO-TPA2和DTXO-TPA4)。所有基于这些发射器的设备都表现出了出色的性能。特别是，DTXO-TPA2凭借其优异的电学性质，表现出最大的光致发光量子产率(PLQY)和水平取向的发射偶极子。结果表明，基于DTXO-TPA2的橙红色OLED的最大外量子效率(EQE)为24.98%，功率效率(PE)为77.74×lm/W−1。此外，由于稳定的分子框架和良好的器件特性，基于DTXO-TPA2的器件在初始发光强度为1000cd/m−2的50%时的寿命可达1392h。此外，基于DTXO-TPA2的白色OLED可以获得高的外量子效率17.96%和显色指数85，CIE为(0.31，0.31)。这项工作支持了一种有效的设计策略，即增加橙红色TADF材料的TXO受体基团，以开发高效、长寿命的OLED。
The efficiency and lifetime are critical to the development of high-quality organic light-emitting diodes (OLEDs). Herein, four dual-acceptor typed thermally activated delayed fluorescence (TADF) emitters (DTXO-PhCz2, DTXO-PhCz4, DTXO-TPA2 and DTXO-TPA4) with emission from yellow to red were designed by taking triphenylamine or N-phenylcarbazole as the donor and 9-H-thioxanthen-9-one-10,10-dioxide (TXO) as the acceptor. All of the devices based on these emitters showed outstanding performance. Particularly, depending on superior electronic properties, DTXO-TPA2 showed the maximum photoluminescence quantum yield (PLQY) and horizontally oriented emitting dipole. As a result, the orange-red OLED based on DTXO-TPA2 achieve maximum external quantum efficiency (EQE) of 24.98% and power efficiency (PE) of 77.74 lm W−1. And, thanks to the stable molecular framework and favorable device characteristics, the lifetime value of DTXO-TPA2-based device can reach up to 1392 h at 50% of the initial luminescence of 1000 cd m−2. Furthermore, the white OLED based on DTXO-TPA2 can achieve high EQE of 17.96% and color rendering index of 85 with CIE of (0.31,0.31). This work supports an effective design strategy about increasing TXO acceptor moieties for the orange-red TADF materials to develop highly efficient and long-lived OLEDs.
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影响因子：
13.3
作者：
Yuan-Yuan Wang-Yuan;Kaining Tong;Kai Zhang;Chen‐Han Lu;Xing Chen;Jingtang Liang;Chuan-kui Wang;Chung‐Chih Wu;M. Fung;Jian Fan
通讯作者：
Yuan-Yuan Wang-Yuan;Kaining Tong;Kai Zhang;Chen‐Han Lu;Xing Chen;Jingtang Liang;Chuan-kui Wang;Chung‐Chih Wu;M. Fung;Jian Fan
影响因子：
16.6
作者：
Li, Zhe;Yang, Dezhi;Xu, Hui
通讯作者：
Xu, Hui
影响因子：
4.6
作者：
Furukawa T;Nakanotani H;Inoue M;Adachi C
通讯作者：
Adachi C
影响因子：
29.4
作者：
Wong, Michael Y.;Zysman-Colman, Eli
通讯作者：
Zysman-Colman, Eli
影响因子：
6.4
作者：
Sasabe, Hisahiro;Kido, Junji
通讯作者：
Kido, Junji