An aromatic-imide based TADF emitter (AI-4Cz) was designed and synthesized. The TADF emitter showed high thermal stability, good electrochemical properties, obvious AIE activity, small ΔE_ST value of 0.02 eV, and intense yellow emissions with PLQY of 76%. AI-4Cz also exhibited obvious microsecond-scale delayed fluorescence lifetime. Yellow OLED based on AI-4Cz was further fabricated, which achieved EQE_max of 16.7%. Moreover, a white OLED was fabricated through the dual emission layer strategy by using AI-4Cz and DMAC-DPS as emitting dopants, and the device obtained CIE coordinates of (0.30, 0.40), CRI value of 66, and an EQE_max of 13.6%.

设计并合成了基于芳族酰亚胺的TADF发射极（AI - 4Cz）。TADF发射体显示出高的热稳定性，良好的电化学性能，明显的AIE活性，较小的ΔE _ST值（0.02 eV）和强烈的黄色发射，PLQY为76％。AI-4Cz还表现出明显的微秒级延迟荧光寿命。进一步制造了基于AI-4Cz的黄色OLED ，其EQE_最大值达到16.7％。此外，通过使用AI-4Cz和DMAC-DPS通过双重发射层策略制造了白色OLED。作为发射掺杂剂，该器件的CIE坐标为（0.30，0.40），CRI值为66，EQE _max为13.6％。