| 초록 |
Novel 1-position of carbazole based host materials were synthesized, and applied in blue phosphorescent organic light-emitting diodes (PHOLEDs). The 1-position of the phenyl carbazole was connected via different positions of another carbazole to build 1-position of the carbazole based bicarbazole moiety, and diphenyltriazine moiety was introduced to control charge transport property. The highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) were approximately -6.1 and -3.3 eV, respectively. The maximum external quantum efficiency of the green PHOLEDs was obtained to be 24.5 %. |
