Novel Deep‐Blue Hybridized Local and Charge‐Transfer Host Emitter for High‐Quality Fluorescence/Phosphor Hybrid Quasi‐White Organic Light‐Emitting Diode
作者:Hao Zhang、Jianan Xue、Chenglong Li、Shitong Zhang、Bing Yang、Yu Liu、Yue Wang
DOI:10.1002/adfm.202100704
日期:2021.6
multi-functional emitting host matrix constructing the high-performance phosphorescent OLEDs. More importantly, a high-efficiency candle light-style OLED adopting the HLCT/phosphor hybrid strategy is realized, where 2TPA-PPI acts as not only a blue emitter, but also a universal host sensitizing both yellow and red phosphors. This quasi-white OLED represents almost the highest EQE/PE level of 25.2%/49.7 lm W−1
在这项工作中,获得了一种新的混合局部和电荷转移(HLCT)分子 2TPA-PPI,用于构建高性能有机发光二极管(OLED)。2TPA-PPI 具有足够的发射/电荷传输特性,因此可用作纯发射器,实现高效的深蓝色 OLED,外量子效率 (EQE) 高达 10.7%,以及多功能发射构建高性能磷光 OLED 的主体基质。更重要的是,实现了采用 HLCT/磷光体混合策略的高效烛光式 OLED,其中 2TPA-PPI 不仅充当蓝色发光体,而且还充当对黄色和红色磷光体敏感的通用宿主。这种准白色 OLED 几乎代表了 25.2%/49.7 lm W -1的最高 EQE/PE 水平在 1000 cd m -2的实际亮度水平下,白色 OLED 具有超过 80 的出色显色指数值。