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利用紫外-可见吸收光谱和电化学方法表征了三个系列新型的1,3,4-噁二唑类化合物的能级结构.设计并制备了以噁二唑衍生物与MEH-PPV的共混物作为发光层的电致发光器件(LED),比较了不同结构噁二唑引入发光层后对器件性能的影响.研究结果表明,以共混物为发光层的LED,其最大亮度可达到11810cd/m2(8.5V),最大流明效率为1.1cd/A.与纯MEH-PPV单层发光器件相比,最大亮度提高了约40倍.结果表明,噁二唑类衍生物具有优良的电子传输特性,将其引入发光层能有效地提高LED的性能.
The energy structure of three series of 1,3,4-oxadiazole compounds was characterized by UV-Vis absorption spectroscopy and electrochemical methods. The blends of oxadiazole derivatives and MEH-PPV were designed and prepared As the light-emitting layer electroluminescent device (LED), compared the different structure of oxadiazoles into the light-emitting layer after the device performance.The results show that the blends as the light-emitting layer of the LED, the maximum brightness of up to 11810cd /m2(8.5V), the maximum lumen efficiency of 1.1cd / A. Compared with pure MEH-PPV single-layer light-emitting devices, the maximum brightness increased by about 40 times.The results show that the oxadiazole derivatives have excellent electron transport Characteristics, the introduction of light-emitting layer can effectively improve the performance of LED.