4, 6-Bis[3-(dibenzothiophen-2-yl)phenyl] pyrimidine bipolar host for bright, efficient and low efficiency roll-off phosphorescent organic light-emitting devices
作者:Jing Yu、Chunxiu Zang、Ziwei Yu、Hui Wang、Shihao Liu、Letian Zhang、Wenfa Xie、Hongyu Zhao
DOI:10.1016/j.orgel.2016.09.002
日期:2016.11
and dopants are fabricated. Compared to other hosts, the DBTPhPm-based PHOLEDs exhibited high brightness, high efficiency and low efficiency roll-off. The maximum power efficiency of the DBTPhPm-based red (R), green (G), blue (B), yellow (Y), and orange (O) PHOLEDs are 12.2, 47.2, 17.6, 42.6 and 15.1 lm/W, respectively. The current efficiency roll-off of the R, G, B, Y, and O PHOLEDs are 29.8%, 8.6%
合成了具有小单线态-三重态分裂的双极性主体4,6-双[3-(二苯并噻吩-2-基)苯基]嘧啶(DBTPhPm),并通过一系列光物理和电化学性质对其进行了确认。基于不同主体的单色磷光有机发光器件(PHOLED)[(4,4'- N,N制备了′-二咔唑)联苯,2,7-双(二苯基磷酰基)-9- [4-(N,N二苯基氨基)苯基] -9-苯基芴,(3,3′-联咔唑)苯基和DBTPhPm]和掺杂剂。与其他主机相比,基于DBTPhPm的PHOLED表现出高亮度,高效率和低效率滚降。基于DBTPhPm的红色(R),绿色(G),蓝色(B),黄色(Y)和橙色(O)PHOLED的最大功率效率分别为12.2、47.2、17.6、42.6和15.1 lm / W。 。从最大电流效率到5000 cd / m 2的高亮度,R,G,B,Y和O PHOLED的电流效率下降分别为29.8%,8.6%,18.2%,5.9%和22.