Solution-processable orange-red thermally activated delayed fluorescence hyper-structured molecular emitters containing diphenylamine substituted carbazole host units
作者:Yufei Lu、Denghui Liu、Jingran Zhao、Xiaoyu Yin、Kunlun Wang、Yingliang Liu、Shengang Xu、Shi-Jian Su、Shaokui Cao
DOI:10.1016/j.dyepig.2023.111548
日期:2023.11
Realizing solution-processable orange-red thermally activated delayed fluorescence (TADF) emitters is still challenging owing to the severe aggregation-caused quenching. In this study, N3,N3,N6,N6-tetraphenyl-9H-carbazole-3,6-diamine (DDPACz) with high triplet energy and good hole transport ability was chosen as host unit. And 1,8-naphthimide-9,9-dimethyl-9,10-dihydroacridine (NDMAC) was used as red
由于严重的聚集引起的猝灭,实现可溶液加工的橙红色热激活延迟荧光(TADF)发射器仍然具有挑战性。本研究选择具有高三线态能量和良好空穴传输能力的N 3 ,N 3 , N 6 ,N 6 -四苯基-9H-咔唑-3,6-二胺(DDPACz)作为主体单元。红色TADF单元为1,8-萘二酰亚胺-9,9-二甲基-9,10-二氢吖啶(NDMAC)。然后,将这两个功能单元连接到无活性的杯[4]间苯二酚(CRA)核心,构建一系列超结构分子(HSM),CRA-NDMAC(x)-DDPACz(8-x)(x = 0、1、2、4、6、7或8 )。1H NMR、MALDI-TOF MS 和 FT-IR 谱表明 HSM 已成功合成。UV-Vis、PL 和 CV 结果表明这些 HSM 继承了功能单元的光物理和电化学特性。旋涂CRA-NDMAC (x) -DDPACz (8-x) (x=1、2、4、6、7或8)作为发光层,所