Fluorescent materials taking both advantages of evaporation and solution processes are urgently explored for the development of efficient and simplified organic light-emitting diodes (OLEDs). Furthermore, it is another huge challenge for such materials to achieve excellent electroluminescence performances in non-doped OLEDs. Herein, two new emitters, named as PyB-DPAC and PyB-DMAC with 4-benzoylpyridine moiety as the electron acceptor and 9,9-diphenyl-9,10-dihydroacridine or 9,9-dimethyl-9,10-dihydroacridineas the electron donor were synthesized and explored. Both emitters exhibit distinct TADF character, typical AIE feature and relatively high photoluminescence quantum yields. Accordingly, we demonstrated efficient non-doped vacuum-deposited OLED based on the PyB-DPAC with a maximum external quantum efficiency (EQE) up to 9.7%, and meanwhile an extremely low efficiency roll-off of 1.7% at a high brightness of 1000 cd m⁻². In addition, an impressive EQE of 11.1% can be realized from the solution-processed non-doped devices with the using of PyB-DPAC emitter. These affirmative results manifest that TADF emitters incorporate with the benzoylpyridine acceptor enabling a promising molecular design strategy in adapt to the non-doped evaporation- and solution-processed highly efficient OLEDs.

为了开发高效且简化的有机发光二极管（OLED），迫切需要探索兼具蒸发和固溶工艺优势的荧光材料。此外，对于此类材料而言，在非掺杂的OLED中实现出色的电致发光性能也是另一个巨大的挑战。在此，两个新的发射体分别称为PyB-DPAC和PyB-DMAC，其中4-苯甲酰基吡啶部分为电子受体，9,9-二苯基-9,10-二氢ac啶或9,9-二甲基-9,10-二氢ac啶为电子供体进行了合成和探索。两种发射器均显示出独特的TADF特性，典型的AIE特征和相对较高的光致发光量子产率。因此，我们展示了基于PyB-DPAC的高效非掺杂真空沉积OLED，其最大外部量子效率（EQE）高达9.7％，⁻²。此外，通过使用PyB-DPAC发射极进行溶液处理的非掺杂器件，可以实现11.1％的令人印象深刻的EQE。这些肯定的结果表明，TADF发射体与苯甲酰基吡啶受体结合，可实现一种有前途的分子设计策略，以适应未掺杂的蒸发和溶液处理的高效OLED。