| 초록 |
Recently, a great progress has been made in the device performance of blue phosphorescent organic light-emitting diodes (Ph-OLEDs). Promising essential materials for the device performances are host materials organizing an emitting layer. Host materials typically require good compatibility in singlet and triplet energy levels with blue dopants and neighboring auxiliary transport layers. Moreover, host materials should have good bipolar charge transporting properties for improving the balance of electron and hole within the emitting layer. Among the various materials, carbazole unit has a lot of advantage for the host. Carbazole has a high triplet energy, high charge mobility and good hole transporting property. In this study, we demonstrated the synthesis of new carbazole-based host materials containing dibenzothiophene, pyridine, and phenyl moieties and we examined their thermal, photophysical, electrochemical properties. |
