Low efficiency roll-off phosphorescent organic light-emitting devices using thermally activated delayed fluorescence hosts materials based 1, 2, 4-triazole acceptor
Low efficiency roll-off phosphorescent organic light-emitting devices using thermally activated delayed fluorescence hosts materials based 1, 2, 4-triazole acceptor
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使用基于1,2,4-三唑受体的热激活延迟荧光主体材料的低效率滚降磷光有机发光器件
DOI:
10.1016/j.orgel.2019.06.041
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发表时间:
2019-11
影响因子:
3.2
通讯作者:
Xu Bingshe
中科院分区:
文献类型:
--
作者:
Xu Huixia;Zhao Yaping;Zhang Jing;Zhang Di;Miao Yanqin;Shinar Joseph;Shinar Ruth;Wang Hua;Xu Bingshe
The host in phosphrescent organic light emitting devices (PhOLEDs), showing the thermally activated delayed fluorescence (TADF) charateristic, can effectively overcome the efficiency roll-off. Herein, six bipolar compounds with donor-π-acceptor (D-π-A) and D-π-A-π-D structures have been synthesized using 1, 2, 4-triazole derivative (TAZ) as an acceptor and phenothiazine (PTZ), phenoxazine (PXZ), and 9, 9-dimethylacridane (DMAC) as donors. The molecular structures were confirmed by 1 H NMR, 13 C NMR and X-ray single-crystal diffractions. The large steric hindrance endows these molecules with typical TADF features, including the small singlet-triplet energy splitting (Δ E S T) of 0.08–0.30 eV and completely spatially separate highest occupied molecular orbitals (HOMO) and the lowest unoccupied molecular orbitals (LUMO) electron densities. The PhOLEDs hosted by these novel TADF materials display excellent performances with low efficiency roll-off.
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影响因子:
4.6
作者:
Xiaolong Yang;Xianbin Xu;Jing-shuang Dang;Guijiang Zhou;Cheuk-Lam Ho;Wai-Yeung Wong
通讯作者:
Wai-Yeung Wong
影响因子:
6.4
作者:
Samik Jhulki;A. K. Mishra;Avijit Ghosh;T. J. Chow;J. N. Moorthy
通讯作者:
Samik Jhulki;A. K. Mishra;Avijit Ghosh;T. J. Chow;J. N. Moorthy
影响因子:
6.4
作者:
Ding, Junqiao;Xie, Zhiyuan;Wong, Wai-Yeung;Wang, Lixiang
通讯作者:
Wang, Lixiang
影响因子:
3.2
作者:
S. Yuan;Xiaoyang Du;Juewen Zhao;W. Liu;Hui Lin;Caijun Zheng;S. Tao;Xiaohong Zhang
通讯作者:
S. Yuan;Xiaoyang Du;Juewen Zhao;W. Liu;Hui Lin;Caijun Zheng;S. Tao;Xiaohong Zhang
影响因子:
19
作者:
Tao, Peng;Li, Wei-Ling;Huang, Wei
通讯作者:
Huang, Wei