Four aryl-substituted acridan derivatives were designed, synthesized and characterized as electroactive materials for organic light emitting diodes based on emitters exhibiting thermally activated delayed fluorescence. These compounds possessed relatively high thermal stability with glass-transition temperatures being in the range of 79–97 °C. The compounds showed oxidation bands arising from acridanyl groups in the range of 0.31–038 V. Ionization potentials of the solid films ranged from 5.39 to 5.62 eV. The developed materials were characterized by triplet energies higher than 2.5 eV. The layer of 10-ethyl-9,9-dimethyl-2,7-di(naphthalen-1-yl)-9,10-dihydroacridine demonstrated hole mobilities reaching10⁻³ cm²/V·s at electric fields higher then ca. 2.5 × 10⁵ V/cm. The selected compounds were used as hosts in electroluminescent devices which demonstrated maximum external quantum efficiencies up to 3.2%.

中文翻译：

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芳基取代的cri啶酮作为基于TADF的OLED的主体。

设计，合成和表征了四种芳基取代的cri啶酮衍生物，将其用作有机发光二极管的电活性材料，其基于具有热激活延迟荧光的发射体。这些化合物具有较高的热稳定性，玻璃化转变温度在79–97°C的范围内。化合物显示出由cri啶基产生的氧化带，范围为0.31-038V。固体膜的电离电势范围为5.39至5.62 eV。所开发的材料的特征在于三重态能量高于2.5 eV。10-乙基-9,9-二甲基-2,7-二（萘-1-基）-9,10-二氢ac啶层的空穴迁移率在高于约ca的电场下达到10 ^-3 cm ² / V·s。2.5×10 ⁵V /厘米 选定的化合物用作电致发光器件的主体，该器件具有高达3.2％的最大外部量子效率。