| 초록 |
A bipolar material DBTO-IN/ CAR (2-(5-phenylindolo[3,2-a]carbazol-12(5H)-yl)dibenzothiophene 5,5-dioxide) was designed and synthesized. The material revealed an excellent glass transition temperature (Tg) of 156 °C. We have fabricated two different devices, namely a non-doped bipolar fluorescent emitter and a green phosphorescent OLED with DBTO-IN/CAR as host material. The DBTO-IN/CAR host material-based device exhibited excellent maximum current and power efficiencies of 51.98 cd/A and 45.36 lm/W, respectively. The DBTO-IN/CAR-based host device revealed a good external quantum efficiency of 19.03%. Moreover, a non-doped DBTO-IN/CAR fluorescent emitter related device showed better current and external quantum efficiencies of 4.30 cd/A and 2.47%, respectively, with the cyan emission. |
