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有机电致发光器件(Organic Light-Emitting Device,OLED)已成为当今最热门的研究领域之一。以钛酸锶(100)作为基底,采用RF磁控溅射镀膜系统制成磁性电极La1-xSrxMn O3(LSMO)薄膜,为了增加钛酸锶基底LSMO薄膜的透光率,对该基底进行了双面光学抛光。在此基础上,以LSMO为衬底,制作了结构为LSMO/NPB/Alq3/Cs F/Mg:Ag的有机电致发光器件。器件大约在14 V时启亮,在25 V时,器件达到最大亮度。在磁场作用下,研究了器件的亮度-电压-电流特性。在大约150 m T磁场下,器件的发光亮度增大10%。研究结果表明:由于经LSMO注入发光层内部的电子和空穴自旋方向被部分极化,发光层单线态与三线态激子的形成比率增加。由于发光材料Alq3是单线态有机材料,因而,器件发光亮度增大。
Organic Light-Emitting Device (OLED) has become one of the hottest fields of research today. The strontium titanate (100) substrate was used to fabricate a La1-xSrxMnO3 (LSMO) magnetic film with RF magnetron sputtering system. In order to increase the transmittance of strontium titanate LSMO film, Optical polishing. On this basis, an LSMO / NPB / Alq3 / Cs F / Mg: Ag organic electroluminescent device was fabricated using LSMO as substrate. The device turns on at approximately 14 V, and at 25 V the device reaches its maximum brightness. Under the action of magnetic field, the brightness-voltage-current characteristics of the device are studied. At about 150 mT magnetic field, the brightness of the device increased by 10%. The results show that the formation ratio of singlet state to triplet exciton increases with the partial polarization of the electron and hole spin directions injected into the luminescent layer through LSMO. Since the light-emitting material Alq3 is a singlet organic material, the luminance of the device is increased.