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中文摘要：
利用紫外．可见光吸收光谱和荧光发射光谱，比较了共轭结构芴类小分子有机材料2，3-bis（9，9．dihexyl-9H-fluoren-2-y1）quinoxaline（Py），2，3-bis（9，9-dihexyl-9H-fluoren-2-y1）-6，7-difluoroquinoxaline（F2Py）和2，3．bis（9，9．dihexyl．9H-fluoren．2．y1）．5，6，7，8-tetrafluoroquinoxa—line（F4Py）的光谱特性；选用N，N＇-Di-【（1-naphthalenyl）-N，N＇-diphenyl]-（1，1＇-biphenyl）-4，4’-diamine（NPB）材料作为空穴传输层，利用真空蒸镀方法制备了双层有机电致发光器件（organiclight-emittingdevice，OLED），研究了其电致发光特性，进而讨论了增加氟助色团对芴类有机小分子光电性能的影响．结果表明，随着氟取代基的增加，材料薄膜状态的吸收谱和荧光光谱均发生了红移．器件方面，Pv在5V驱动电压下发出508nm的蓝绿光，色坐标为（0．23，0．43），半峰宽为100nm；器件启动电压（定义为当亮度达到1cd／m2的驱动电压）为4．8V；在10v驱动电压下，亮度达到129cd／m2，电流密度为59mA／cm2；在5．4v电压下具有最大流明效率0．18／m／W．F2ey和F4Py在5v驱动电压下分别发出544nm的绿光和570nm的黄光，色坐标分别为（0．38，0．56）和（0．44，0．49），半峰宽分别为103和117nm；器件启动电压分别为4和2v：在10V电压下，亮度分别为557和3300cd／m2，电流密度分别为100和880mA／cm2，分别在7．6V电压下具有最大流明效率0．221m／W和在2v电压下具有最大流明效率0．531m／W．
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