| 초록 |
Silicon atoms are used in blue host materials due to their many advantages, such as conjugation blocking for a wide band gap and a tetrahedral geometry for morphology. In this regard, a series of electron-transport materials for deep blue phosphorescent organic light-emitting diode (OLED) were developed employing the tetrahedral structural motif of the silicon atom, MeSiL3, which functioned further to connect triazole, imidazole, triazine, bipyridine, and oxadiazole units in its periphery. Low temperature PL study showed relatively high triplet energy levels for all prepared materials. Furthermore, they have high thermal stability above 100°C. Finally, prepared ETL materials were conducted to the blue phosphorescence OLEDs device and they showed high external quantum efficiency and power efficiency. |
