| 초록 |
In this work, 2,8-bis(pyrido[2,3,-b]indol-9-yl)dibenzofuran (DBFCb) was synthesized as an electron transport type host material for blue phosphorescent organic light-emitting diodes (OLEDs). HOMO and LUMO energy levels of DBFCb are -6.13 eV and -2.58 eV, respectively. The triplet energy of DBFCb can be assumed to be 2.88 eV and iridium (III) bis((3,5-difluorophenyl)pyridine)picolinate (FIrpic) was used as a blue triplet emitter in the DBFCb emitting layer. A maximum quantum efficiency of DBFCb device is 21.3% at a low doping concentration of 3% and the color coordinate of the device is (0.14, 0.30) at 1000 cd/m2. |
