2,3-Di(pyridine-2-yl)-7-(4-triphenylsilyl)phenyl)pyrido[2,3-b]pyrazine (DPPP) containing pyridopyrazine was designed and synthesized as a new electron-transporting material for organic lightemitting devices (OLEDs). The obtained material forms homogeneous and stable amorphous film. The new synthesized showed the reversible cathodic reduction for hole blocking material and the low reduction potential for electron transporting material in organic EL devices. The molecule possess excellent thermal stability with glass transition temperature (Tg ) of 115 °C in nitrogen. DNTPD (60 nm)/NPD (30 nm)/CBP:Irppy 6% (40 nm)/BAlq (10 nm)/ETL (30 nm)/LiF (0.5 nm)/Al structured device were fabricated using DPPP as electron transport material. The maximum luminance reached at 25000 cd/m2. The current efficiency was 10.9 cd/A even high current.
设计并合成了含有
吡啶并
吡嗪的 2,3-二(
吡啶-2-基)-7-(4-三苯基
硅基)苯基
吡啶并[2,3-b]
吡嗪(
DPPP),作为有机发光器件(OLED)的新型电子传输材料。)所获得的材料形成了均匀稳定的无定形薄膜。合成的新材料在有机发光器件中作为空穴阻滞材料具有可逆的阴极还原性,而作为电子传输材料则具有较低的还原电位。该分子具有优异的热稳定性,在氮气中的
玻璃化转变温度(Tg)为 115 ℃。使用
DPPP 作为电子传输材料,制备了 DN
TPD (60 nm)/NPD (30 nm)/CBP:Irppy 6% (40 nm)/BAlq (10 nm)/ETL (30 nm)/
LiF (0.5 nm)/Al 结构器件。最大亮度达到 25000 cd/m2。即使在高电流下,电流效率也达到了 10.9 cd/A。