Dibenzothiophene-Based Phosphine Oxide Host and Electron-Transporting Materials for Efficient Blue Thermally Activated Delayed Fluorescence Diodes through Compatibility Optimization
作者:Chaochao Fan、Chunbo Duan、Ying Wei、Dongxue Ding、Hui Xu、Wei Huang
DOI:10.1021/acs.chemmater.5b02012
日期:2015.7.28
Thermally activated delayed fluorescence (TADF) organic light-emitting diodes arise from the development of high-performance host materials and carrier transporting materials fitting for TADF dyes with optimized respective properties and interplays, making simultaneous performance improvement and device structure simplification feasible. In this work, a highly efficient blue TADF diode with simplified
热活化延迟荧光(TADF)有机发光二极管源于适用于TADF染料的高性能主体材料和载流子传输材料的开发,具有最佳的特性和相互作用,使得同时提高性能和简化装置结构成为可能。在这项工作中,通过使用双[4-(9,9-二甲基-9,10-二氢ac啶)苯基]砜(DMAC - DPS)作为蓝色发射器,成功实现了具有简化的四层结构的高效蓝色TADF二极管, 4,6-双(二苯基)二苯并噻吩(DBTDPO)作为宿主,和4,6-双(二苯基)二苯并噻吩砜(46DBSODPO)作为电子传输层。之间的兼容性DBTDPO和DMAC - DPS和DBTDPO和46DBSODPO在构型,极性,能级和界面相互作用方面进行了优化,从而在掺杂之前和之后均保持了约0.25 nm的不变粗糙度,超过85%的高光致发光量子产率,并减少了界面激基复合物发射。与类似物28DBSODPO和37DBSODPO相比,具有约3.0 eV的相似的三线态激发能(T