| 초록 |
An Al based complex, tris((2-(1H-pyrazol-1-yl)pyridin-3-yl)oxy)aluminum (Al(pypy)3), was synthesized as the host material for blue phosphorescent organic light-emitting diodes (PHOLEDs). The Al(pypy)3 host material showed a high triplet energy of 2.88 eV for efficient energy transfer to blue emitting iridium (III) bis((4,6-difluorophenyl)-pyridine) picolinate (FIrpic) triplet emitter. A maximum quantum efficiency of 20.5% was obtained in the blue PHOLEDs fabricated using the Al(pypy)3 host material at a Firpic doping concentration of 10%. It was revealed that Al complex can be used as triplet host material for blue PHOLEDs for the first time. |
