| 초록 |
Vacuum deposited organic light emitting devices(OLEDs) have already been commercialized. In a vacuum deposition process, the usage yield of OLED materials is very low. Also, pixilation using evaporation masks limits large-size scalabilities and high-resolution applications. However, solution processes are expected to overcome the problems. Here, we demonstrate organic light emitting diodes by using red phosphorescent dye, Iridium(III) is(2-(2,4-Dimethoxy-phenyl)-5-trifluoromethyl pyridinato-N,C2`)-2-pyrazinecarboxylic acid, (dmtfmppy)2Irprz and Iridium(III) bis(2-(2,4-Dimethoxy-phenyl)-5-trifluoromethyl pyridinato-N,C2`)-5-methyl-2-pyrazinecarboxylic acid, (dmtfmppy)2IrMeprz as the guest and as the guest and blend of poly(N-vinylcarbazole) (PVK) with 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD) as the host and different cathode structures. |
