In this paper, two AIE-active luminogens (Oxa- p TPE and Oxa- m TPE) constructed from tetraphenylethene and oxadiazole units were successfully synthesized and their thermal, optical and electronic properties were investigated. By linking TPE to the oxadiazole core through meta-or para-position, the intramolecular conjugation is effectively controlled. Thanks to the intelligent molecular design and specific AIE feature, when fabricated as emissive layers in non-doped OLEDs, they exhibit blue or deep-blue emission with CIE coordinates of (0.17, 0.23) and (0.15, 0.12), and good efficiencies with η C, max and η P, max up to 1.52 cd A−1 and 0.84 Im W−1, shedding some light on the construction of deep-blue AIE fluorophores.
本文成功合成了两种由四苯基
乙烯和噁二唑单元构建的 AIE 活性发光体(Oxa- p TPE 和 Oxa- m TPE),并研究了它们的热学、光学和电子学特性。通过元位或对位将 TPE 连接到噁二唑核心,有效地控制了分子内共轭。得益于智能分子设计和特定的 AIE 特性,当它们被制作成非掺杂有机发光二极管的发射层时,可发出蓝色或深蓝色的光,CIE 坐标分别为 (0.17, 0.23) 和 (0.15, 0.12),并且具有良好的效率,η C, max 和 η P, max 分别高达 1.52 cd A-1 和 0.84 Im W-1,为深蓝色 AIE 荧光体的构建提供了一些启示。