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制备了以芳香族二胺类衍生物TPD为空穴传输层、8 羟基喹啉铝Alq3掺杂红光染料DCJTB作为发光层、LiF/Al为复合电极的红色发光二极管。研究了不同掺杂质量分数对器件发光光谱、亮度电流电压特性的影响。发现由于DCJTB的自极化作用 ,发光峰值位置有 30nm的移动。当掺杂质量分数为 0 2 %和 3 %时 ,器件的最高亮度分别为 1740 0cd/m2 和 2 90 0cd/m2 ,2 0mA/cm2 时其亮度又分别为 10 80cd/m2 和 15 0cd/m2 ,量子效率分别为 2 %和 0 5 %。
The red light-emitting diode with the aromatic diamine derivative TPD as the hole transport layer, the 8-hydroxyquinoline aluminum Alq3-doped red dye DCJTB as the light-emitting layer and the LiF / Al as the composite electrode was prepared. The influence of different doping mass fraction on the luminescence spectra and brightness current-voltage characteristics of the devices was studied. It is found that due to the self-polarization of DCJTB, the emission peak position has a movement of 30 nm. When the doping content is 0 2% and 3%, the maximum brightness of the device is 1740 0 cd / m2 and 2 90 0 cd / m2 respectively, and the brightness of the device is 10 80 cd / m2 and 150 cd / m2 respectively at 20 mA / cm2 The quantum efficiencies were 2% and 0.5% respectively.