Asymmetric Spirobiacridine‐based Delayed Fluorescence Emitters for High‐performance Organic Light‐Emitting Devices
作者:Hiroki Arai、Hisahiro Sasabe、Hisaki Tsuneyama、Kengo Kumada、Junji Kido
DOI:10.1002/chem.202101188
日期:2021.7.26
combination, various asymmetric spirobiacridine (SBA)-based TADF emitters with a unity photoluminescence quantum yield and high Θ ratio of over 80 % were developed. Furthermore, the substitution effects of the triazine acceptor unit on the photophysical properties were studied, including molecular orientations and OLED performance. The corresponding OLED exhibited sky-blue emission with a high EQE of over 30 %
最近,研究人员专注于热激活延迟荧光 (TADF),以实现高效的未来照明和显示。在 TADF 发射体中,三嗪和吖啶的组合是实现高效有机发光器件 (OLED) 的有希望的候选者。然而,同时开发完美的水平取向 (Θ=100%) 和超过 40% 的外部量子效率 (EQE) 仍然具有挑战性。在这里,为了获得进一步改进三嗪/吖啶组合的见解,开发了具有统一光致发光量子产率和超过 80% 的高 Θ 比率的各种基于非对称螺二吖啶 (SBA) 的 TADF 发射器。此外,研究了三嗪受体单元的取代效应对光物理性质的影响,包括分子取向和 OLED 性能。