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⁻¹ and 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⁻¹ and 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.

通过对单线态和三线态激子进行有效管理，实现了以基于mSOAD的a啶/砜衍生物的蓝色热激活延迟荧光（TADF）发光体为主体的高效红色和白色有机发光二极管（OLED）。红色的OLED达到高的最大电流效率，功率32.7 CD A的效率和EQE ^-1，31.0流明w ^ ^-1和20.3％之间。并且，具有不同掺杂剂浓度的白色OLED分别显示出±（0.008，0.001），±（0.000，0.003）和±（0.002，0.005）的超高色彩稳定性。同时，高的效率也与最大电流效率，功率效率和28.2-32.0光盘的EQEs实现^-1，26.3-30.5流明w ^ ^-1和分别为12.2-17.4％。对能级和瞬态衰减特性的分析表明，优异的器件性能主要来自于电荷和激子的充分限制以及从TADF主体到掺杂剂的有效能量转移。