四苯乙烯
三苯胺
荧光
聚集诱导发射
材料科学
光化学
荧光团
有机发光二极管
量子效率
接受者
四氢呋喃
分子
化学
电致发光
光电子学
纳米技术
有机化学
物理
量子力学
图层(电子)
凝聚态物理
溶剂
作者
Lei Xu,Yuan Yu,Jinjin Shi,Wei Cui,Xianhao Lv,Miao Cang,Qikun Sun,Shanfeng Xue,Wenjun Yang
标识
DOI:10.1016/j.dyepig.2019.108082
摘要
Tetraphenylethene (TPE) is a star group exhibiting an excellent aggregation-induced emission (AIE) effect. Although significant progress has been made in the field of organic electroluminescence (EL) based on TPE-substituted emitters, highly efficient and high-color-purity TPE-substituted blue fluorophores with the AIE effect are still very rare. In this paper, a simple and effective molecule—N-phenyl-N-(4-(1-phenyl-1H-phenanthro[9,10-d]imidazol-2-yl)phenyl)-4′-(1,2,2-triphenylvinyl)-[1,1′-biphenyl]-4-amine (TPETPAPI)—was designed and synthesized using triphenylamine (donor), phenanthroimidazole (acceptor), and tetraphenylethylene (AIE generator). In tetrahydrofuran solution, the molecule emits little light and the quantum efficiency is low (1.3%); however, the fluorescence is enhanced in the film (73%), exhibiting remarkable AIE properties, thus enabling TPETPAPI to be used in future applications in organic light-emitting diodes. The nondoped device exhibits a low turn-on voltage of 3.0 V, a maximum luminance of 10780 cd m−2, maximum current efficiency of 12.20 cd A−1, and maximum power efficiency of 11.95 lm W−1, with an EL peak at 476 nm. TPETPAPI exhibits the most impressive EL performance reported to date for a TPE-substituted blue fluorophore with AIE' characteristics.
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