Blue thermally activated delayed fluorescence based on tristriazolotriazine core: Synthesis, property and the application for solution-processed OLEDs
Blue thermally activated delayed fluorescence based on tristriazolotriazine core: Synthesis, property and the application for solution-processed OLEDs
复制标题
基于三三唑并三嗪核的蓝色热激活延迟荧光：溶液加工OLED的合成、性能和应用
DOI：
10.1016/j.dyepig.2020.108589
复制
发表时间：
2020
影响因子：
4.5
通讯作者：
Wang Yafei
中科院分区：
文献类型：
--
作者：
Wang Shengyue;Wang Xiangbing;Lee Kyung Hyung;Liu Shuai;Lee Jun Yeob;Zhu Weiguo;Wang Yafei
具有热激活延迟荧光（TADF）特性的蓝色发光体在有机电致发光器件（OLED）中引起了学术界和工业界的广泛关注。本文以三唑并三嗪（TTT）为电子受体，芳胺（咔唑和吖啶衍生物）为电子给体，合成并表征了TTT-Ph-Cz、TTT-Ph-Ac和TTT-Ph-BAc三种蓝色分子。两种吖啶取代的化合物（TTT-Ph-Ac和TTT-Ph-BAc）在薄膜状态下均显示出460 - 470 nm的蓝色TADF发射。此外，TTT-Ph-BAc显示出明显的聚集诱导发射特征。制备了基于这三种分子的溶液处理OLED，并且基于TTT-Ph-Ac的器件显示出约10%的最大外量子效率和480 nm的峰值波长。该研究表明，这种新型的TTT核可以是一个有前途的电子接受单元的TADF材料的设计。
Blue emitters with thermally activated delayed fluorescence (TADF) characteristics have attracted much attention from both academic and industrial researchers in organic light-emitting diodes (OLEDs). In this contribution, three blue molecules of TTT-Ph-Cz, TTT-Ph-Ac and TTT-Ph-BAc in which the tristriazolotriazine (TTT) was employed as the electron acceptor and arylamine (carbazole and acridine derivatives) as the electron donor were prepared and characterized. Both the acridine-substituted compounds (TTT-Ph-Ac and TTT-Ph-BAc) displayed the blue TADF emission between 460 and 470 nm in film state. Additionally, the TTT-Ph-BAc showed clear aggregation-induced emission character. The solution processed OLEDs based on these three molecules were fabricated, and the TTT-Ph-Ac based device displayed a maximum external quantum efficiency of ~10% and peak wavelength of 480 nm. This research demonstrates that this novel TTT core can be a promising electron accepting unit for the design of TADF materials.