In this paper, solution-processed blue organic light-emitting devices (OLEDs) with high efficiency and high luminance are realized. A blue thermally activated delayed fluorescence (TADF) material, 4CzFCN, is used as the emitting material. A host material with high hole mobility, mCP, and an electron transport material with high electron mobility and lower LUMO level, B4PyMPM, are employed to increase the electron density and balance the carrier distribution inside the emission layer. As a result, a luminance of 7625.0 cd/m², a current efficiency of 49.3 cd/A, and an external quantum efficiency of up to 24% are obtained. To the best of our knowledge, these values are superior to the highest values reported for this material in the literatures.

在本文中，实现了具有高效率和高亮度的溶液处理的蓝色有机发光器件（OLED）。蓝色热激活延迟荧光（TADF）材料4CzFCN被用作发射材料。具有高空穴迁移率的基质材料mCP和具有高电子迁移率和较低LUMO能级的电子传输材料B4PyMPM被用于增加电子密度并平衡发射层内部的载流子分布。结果，获得了7625.0cd / m ²的亮度，49.3cd / A的电流效率和高达24％的外部量子效率。据我们所知，这些值优于文献中报道的该材料的最高值。