Efficient management of excitons in red and white organic light-emitting diodes by employing blue thermally activated delayed fluorescent emitter based acridine/sulfone derivative as the host
Efficient management of excitons in red and white organic light-emitting diodes by employing blue thermally activated delayed fluorescent emitter based acridine/sulfone derivative as the host
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采用基于吖啶/砜衍生物的蓝色热激活延迟荧光发射体作为主体,有效管理红色和白色有机发光二极管中的激子
DOI:
10.1016/j.orgel.2018.03.031
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发表时间:
2018-06
影响因子:
3.2
通讯作者:
Li Wenlian
中科院分区:
文献类型:
--
作者:
Wang Ziqi;Zhang Heng;Wang Zongtao;Zhao Bo;Chen Liuqing;Li Jie;Wang Hua;Hao Yuying;Li Wenlian
Highly efficient red and white organic light-emitting diodes (OLEDs) employing blue thermally activated delayed fluorescent (TADF) emitter of mSOAD based acridine/sulfone derivative as the host are realized by efficient management for singlet and triplet excitons. The red OLEDs reach a high maximum current efficiency, power efficiency and EQE of 32.7 cd A−1, 31.0 lm W−1and 20.3%, respectively. And the white OLEDs with different dopant concentrations exhibit ultra-high color stability of ±(0.008, 0.001), ±(0.000, 0.003) and ±(0.002, 0.005), respectively. Meantime, the high efficiencies are also achieved with maximum current efficiencies, power efficiencies and EQEs of 28.2–32.0 cd A−1, 26.3–30.5 lm W−1and 12.2–17.4%, respectively. The analysis of energy level and transient decay characteristics demonstrate the excellent device performances are mainly stemmed from the sufficient confinement for charges and excitons and efficient energy transfer from the TADF host to dopant.
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