Two thermally stable and AIE active 1,8-naphthalimide derivatives with red efficient thermally activated delayed fluorescence
Two thermally stable and AIE active 1,8-naphthalimide derivatives with red efficient thermally activated delayed fluorescence
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两种具有红色高效热激活延迟荧光的热稳定且具有 AIE 活性的 1,8-萘二甲酰亚胺衍生物
DOI：
10.1016/j.dyepig.2019.04.071
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发表时间：
2019
影响因子：
4.5
通讯作者：
Chi Zhenguo
中科院分区：
文献类型：
--
作者：
Wu Yunan;Chen Xiaojie;Mu Yingxiao;Yang Zhan;Mao Zhu;Zhao Juan;Yang Zhiyong;Zhang Yi;Chi Zhenguo
基于1，8-萘二甲酰亚胺(NI)强电子受体(A)，开发了具有聚集诱导发射(AIE)特性的红色热激活延迟荧光(TADF)发射体。以强电子含量的10-H-吩噻嗪(PZ)或9，9-二甲基-9，10-二氢吖啶(DMAC)为电子给体，以2，6-二甲基苯基(DM)为π桥，这些高扭曲D-π-A结构的镍衍生物表现出典型的AIE特征和良好的固态TADF发射，光致发光量子产率高达55%。此外，镍衍生物在固体非晶态下表现出良好的热形态稳定性，为实际应用提供了稳定的EML。最后，在电致发光峰值为635 nm的红色有机电致发光器件中，获得了7.13%的外量子效率。
Red thermally activated delayed fluorescence (TADF) emitters with aggregation-induced emission (AIE) properties have been developed, based on strong electron-with-drawing 1,8-naphthalimide (NI) acceptor (A). With strong electron-rich 10-H-phenothiazine (Pz) or 9,9-dimethyl-9,10-dihydroacridine (DMAC) groups as electron donors (D), 2,6-dimethylphenyl (DM) as a π-bridge, these highly twist D-π-A architecture NI derivatives showed typical AIE feature and excellent solid-state TADF emission with high photoluminescence quantum yield (PLQY) up to 55%. Moreover, the NI derivatives exhibited excellent thermal morphological stability in their solid amorphous states, providing a stable EML for practical applications. Finally, a high external quantum efficiency (EQE) of 7.13% from Pz-DMNI, was achieved in the red OLEDs device with electroluminescence (EL) peak of 635 nm.