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
Li Wenlian
中科院分区:
工程技术3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

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采用基于mSOAD的吖啶/砜衍生物的蓝色热激活延迟荧光(TADF)发射体作为主体,通过对单重态和三重态激子的有效管理来实现高效的红色和白色有机发光二极管(OLED)。红色OLED的最大电流效率、功率效率和EQE分别为32.7 cd A−1、31.0 lm W− 1和20.3%。不同掺杂浓度的白色OLED显示出超高的色稳定性,分别为±(0.008,0.001),±(0.000,0.003)和±(0.002,0.005)。同时,还实现了高效率,最大电流效率、功率效率和EQE分别为28.2-32.0 cd A−1、26.3-30.5 lm W− 1和12.2- 17.4%。能级和瞬态衰减特性的分析表明,TADF对电荷和激子的充分约束以及能量从主体到掺杂剂的有效传递是器件优异性能的主要原因。
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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