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采用八乙基卟啉锌 ( 2 ,3 ,7,8,1 2 ,1 3 ,1 7,1 8 octaethyl 2 1H2 3H porphinezinc,ZnOEP)掺杂八羟基喹啉铝为发光层 ,在不同的掺杂浓度下 ,制备了结构为ITO/TPD/ZnOEP∶Alq3 /Alq3 /Mg∶Ag的多个器件 ,并测试了他们的发光光谱、亮度 -电流曲线以及亮度对时间的响应特性。结果发现 ,当ZnOEP掺杂浓度从 0 5%变化到 1 5%时 ,器件的发光光谱明显不同 ,可以分别得到从橙黄色到红色等不同发光颜色的器件 ,器件的发光效率也从 0 96cd/A变化到 0 1 4cd/A。上述现象可由ZnOEP的自吸收和浓度猝灭效应来解释。另外 ,器件的驱动特性表明 ,Alq3 和ZnOEP之间可能存在能量传递过程。
The octahydroquinolinolaluminum was doped with zinc octaethylporphyrin (2, 3, 7, 8, 12, 13, 17, 18 octaethyl 2 1H2 3H porphinezinc, ZnOEP) A series of devices with the structure of ITO / TPD / ZnOEP: Alq3 / Alq3 / Mg:Ag were prepared at different concentrations. Their luminescence spectra, brightness-current curves and the response of brightness to time were tested. The results show that when the ZnOEP doping concentration changes from 0 5% to 15%, the luminescence spectra of the devices are obviously different, and devices with different luminescence colors from orange to red can be obtained respectively. The luminescent efficiency of the device is also increased from 0 96 cd / A changes to 0 1 4cd / A. The above phenomenon can be explained by the self-absorption of ZnOEP and the effect of concentration quenching. In addition, the drive characteristics of the device indicate that there may be an energy transfer between Alq3 and ZnOEP.