Numerous endeavors have been exerted to devise deep-blue light-emitting materials (LEMs) for organic light-emitting devices (OLEDs). Nevertheless, deep-blue light-emitting materials exhibiting high efficiency for simple-structured OLEDs are still scarce. Herein, a donor-acceptor based LEM, 4'-(4, 5-diphenyl-1-(3-(pyren-1-yl)phenyl)-1H-imidazole-2-yl)-N,N-diphenylbiphenyl-4-amine (TPA-PyI) is developed by merging imidazole, triphenyl-amine and pyrene units for OLEDs. TPA-PyI is used as the emitting layer in OLED device, which emits a deep-blue fluorescence at 444 nm. With a current efficiency (CE) of 3.05 cd/A and a power efficiency (PE) of 2.95 lm/W, an EQE of 2.97% is achieved. High thermal-stability is achieved with decomposition-temperature (T_d) of 516 °C.

为设计用于有机发光器件 (OLED) 的深蓝色发光材料 (LEM)，已经做出了许多努力。然而，对于结构简单的 OLED 而言，表现出高效率的深蓝色发光材料仍然很少。在此，基于供体-受体的 LEM，4'-(4, 5-diphenyl-1-(3-(pyren-1-yl)phenyl)-1H-imidazole-2-yl)-N,N-diphenylbiphenyl-4胺 (TPA-PyI) 是通过合并用于 OLED 的咪唑、三苯胺和芘单元而开发的。TPA-PyI 用作 OLED 器件中的发光层，在 444 nm 处发出深蓝色荧光。电流效率 (CE) 为 3.05 cd/A，功率效率 (PE) 为 2.95 lm/W，可实现 2.97% 的 EQE。516 °C 的分解温度 (T _d )实现了高热稳定性。