基于N-苯基咔唑的红色有机电致发光材料

N-phenyl-carbazole derivative as red dopant in organic electroluminescent device

摘要: 设计合成了一种N-苯基咔唑的衍生物:3-2-(3,3-二腈基亚甲基-5,5-二甲基-1-环己烯基)乙烯基-N-苯基-咔唑(PNCa-2CN)。PNCa-2CN的甲醇溶液光致发光光谱和固体膜光致发光光谱峰值分别位于598nm和660nm。以PNCa-2CN作为红色发光材料掺杂在Alq₃中,制备了结构为ITO/NPB/Alq₃:PNCa-2CN(5%)/Alq₃/Mg:Ag/Ag的具有较高发光效率的红色有机电致发光器件,器件的发光峰值为600nm,在外加20V直流电压时达到2372cd·m^-2的发光亮度,100mA·cm^-2和20mA·cm^-2其亮度分别为323cd·m^-2和64cd·m^-2,器件最大流明效率达到1.3 lm·W^-1。

Abstract: A New N-phenyl-carbazole based red dopant 3-2-（3,3-dicyanomethylene-5,5-dimethyl-1-cyclohexylidene）vinyl-N-phenyl-carbazole（PNCa-2CN） was designed and synthesized for use in red OLED.The photoluminescence and electroluminescence properties were examined.PNCa-2CN shows red photoluminescence with a peak wavelength at 660nm in the solid film and 598nm in solution.Red organic light emitting device（OLED） with PNCa-2CN was fabricated.OLED has a configuration of ITO/NPB/ Alq₃: PNCa-2CN（5%）/ Alq₃/Mg: Ag/Ag.The electrical and optical properties of the devices were studied.