Han Pengbo, Lin Chengwei, Ma Dongge, Qin Anjun, Tang Ben Zhong
State Key Laboratory of Luminescent Materials and Devices, Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates, SCUT-HKUST Joint Research Institute, Center for Aggregation-Induced Emission, South China University of Technology (SCUT), Guangzhou 510640, China.
Department of Chemistry, Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology (HKUST), Clear Water Bay, Kowloon, Hong Kong, China.
ACS Appl Mater Interfaces. 2020 Oct 14;12(41):46366-46372. doi: 10.1021/acsami.0c12722. Epub 2020 Oct 1.
High emission efficiency and finite molecular conjugation in the aggregate state are two desirable features in violet-blue emitters. Aggregation-induced emission luminogens (AIEgens) have emerged as promising luminescent materials that offer these features. Herein, we report the design and synthesis of a group of violet-blue tetraphenylbenzene-based AIEgens with photoluminescence quantum yields over 98% in their film states. When utilizing these AIEgens as nondoped emitting layers, the fabricated organic light-emitting diode exhibits a maximum external quantum efficiency of 4.34% with Commission Internationale de L'Eclairage (CIE) coordinates of (0.159, 0.035), which is amenable to the next-generation ultrahigh-definition television (UHDTV) display standard.
在聚集态下具有高发射效率和有限的分子共轭是蓝紫色发光体中两个理想的特性。聚集诱导发光发光团（AIEgens）已成为具有这些特性的有前途的发光材料。在此，我们报道了一组基于四苯基苯的蓝紫色AIEgens的设计与合成，其薄膜态的光致发光量子产率超过98%。当将这些AIEgens用作非掺杂发光层时，制备的有机发光二极管表现出4.34%的最大外量子效率，国际照明委员会（CIE）坐标为（0.159, 0.035），这符合下一代超高清电视（UHDTV）显示标准。
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