Design of Thermally Activated Delayed Fluorescent Assistant Dopants to Suppress the Nonradiative Component in Red Fluorescent Organic Light‐Emitting Diodes
作者:Ji Han Kim、Kyung Hyung Lee、Jun Yeob Lee
DOI:10.1002/chem.201901135
日期:2019.7.5
Organic light‐emitting diodes are currently under research to achieve high efficiency and long life by using thermally activated delayed fluorescence (TADF) materials. In particular, many studies have focused on ensuring high efficiency in fluorescent devices by introducing TADF materials. Herein, four kinds of orange‐colored TADF materials were synthesized and introduced into 5,10,15,20‐tetraphenylbisbenz[5
目前正在研究有机发光二极管,以通过使用热激活延迟荧光(TADF)材料来实现高效率和长寿命。特别地,许多研究集中在通过引入TADF材料来确保荧光装置的高效率上。在此,合成了四种橙色的TADF材料,并将其引入到5,10,15,20-四苯基双苯并[5,6]茚并[1,2,3- cd:1',2',3'-lm]中ylene(DBP)红色荧光器件作为辅助掺杂剂。这些TADF材料通过减少Dexter能量转移的非辐射过程以及通过Förster共振能量转移过程收集单重态激子来帮助在DBP设备中实现高效率。在四个TADF材料,2-(3,5-二-叔-丁基苯基)-6-(9,9-二苯基ac啶-10(9 H)-基)-1 H-苯并[ de ]异喹啉-1,3(2 H)-二酮(DtBIQAP)显示出更高的反向系统间交叉速率并且非辐射速率常数小于其他两种材料,可以减少激子损失过程。结果,DtBIQAP辅助的DBP器件在红色荧光有机发光二极管中显示出18