Blue thermally activated delayed fluorescence emitter using modulated triazines as electron acceptors
作者:Youngnam Lee、Seung-Je Woo、Jang-Joo Kim、Jong-In Hong
DOI:10.1016/j.dyepig.2019.107864
日期:2020.1
adjusts the reduction potential of the molecule to shift the emission wavelength to the blue region. Moreover, as these emitters become widened, the light out-coupling efficiency increases due to the enhanced horizontal emitting dipole orientation. As a result, OLEDs based on moTrSAc, tmTrSAc, and motmTrSAc emit blue light in a range of 460–480 nm with high EQEs of 21.3, 15.5, and 19.5%, respectively
据报道,有三种类型的热激活延迟荧光(TADF)发射器,即moTrSAc,tmTrSAc和motmTrSAc,它们发射具有高外部量子效率(EQE)的蓝移发射。这些发射器在常见的和各种基于三嗪的电子受体中都有给电子的螺oa啶。电子受体部分的电子和结构控制可调节分子的还原电势,以将发射波长转移到蓝色区域。此外,随着这些发射器变宽,由于增强的水平发射偶极子定向,光输出耦合效率增加。结果,基于moTrSAc,tmTrSAc和motmTrSAc的OLED 发出460-480 nm范围内的蓝光,分别具有21.3%,15.5%和19.5%的高EQE。