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Highly efficient green phosphorescent organic light-emitting diodes based on tetraphenyl silicon derivative host materials
Organic Electronics ( IF 3.2 ) Pub Date : 2019-12-09 , DOI: 10.1016/j.orgel.2019.105581
Lei Ding , Wan-Zhen Fo , Xiang-Yang Liu , Hua Chen , Femi Igbari , Jun-Hui Wu , Zuo-Quan Jiang

We report herein two novel tetraphenyl silicon derivatives, bis(4-(dibenzo[b,d]thiophen-4-yl)phenyl)diphenylsilane (DBTSiDBT) and bis(4- (dibenzo[b,d]furan-4-yl)phenyl)diphenylsilane (DBFSiDBF) achieved by coupling dibenzothiophene (DBT) and dibenzofuran (DBF) moieties with bis(4-bromophenyl)diphenylsilane. These two compounds show high triplet energy states, high glass transition temperature (Tg) and high decomposition temperature (Td). Therefore, they can serve as hosts in organic light-emitting diodes. Consequently, (2-phenylpyridine) iridium(III) (Ir(ppy)3) based phosphorescence organic light-emitting diodes (PHOLEDs) with green emission were studied with DBTSiDBT and DBFSiDBF as host materials. The champion external quantum efficiency (EQE) and maximum luminance of the devices were 24.5% and over 27000 cd/m2 respectively.



中文翻译:

基于四苯基硅衍生物主体材料的高效绿色磷光有机发光二极管

我们在这里报告两个新颖的四苯基硅衍生物,双(4-(二苯并[b,d]噻吩-4-基)苯基)二苯基硅烷(DBTSiDBT)和双(4-(二苯并[b,d]呋喃-4-基)苯基)二苯基硅烷(DBFSiDBF)是通过将二苯并噻吩(DBT)和二苯并呋喃(DBF)部分与双(4-溴苯基)二苯硅烷偶联而实现的。这两种化合物显示出高三重态能态,高玻璃化转变温度(Tg)和高分解温度(Td)。因此,它们可以用作有机发光二极管的主体。因此,使用DBTSiDBTFTIR研究了具有绿色发射的基于(2-苯基吡啶)铱(III)(Ir(ppy)3)的磷光有机发光二极管(PHOLED)。DBFSiDBF作为宿主材料。器件的最佳外部量子效率(EQE)和最大亮度分别为24.5%和27000 cd / m 2以上

更新日期:2019-12-09
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