基于迭层结构的高效红色有机电致发光器件

Highly Efficient Red Organic Light Emitting Diodes Based on Tandem Structure

为了提高红色有机电致发光器件的亮度和效率,引入Alq3∶Mg/WO3作连接层制备了红色迭层有机电致发光器件。通过调节WO3的厚度得到了最佳器件,其效率和亮度达到了普通器件的三倍和四倍。利用铕配合物[Eu(DBM)3bath]和小分子染料器件(DCJTI)单元进行组合制备迭层器件,结构为ITO/TPD/DCJTI∶CBP/BCP/Alq3/Alq3∶Mg/WO3/TPD/Eu(DBM)3bath∶TPD/Eu(DBM)3bath/LiF/Al,器件的最大亮度达8609 cd/m2,最大效率达10.2 cd/A。

In order to improve brightness and efficiency of red organic light emitting devices （OLEDs）, highly efficient red tandem OLEDs have been fabricated by using AlQ3 ： Mg/WO3 as interconnecting layer. The optimal device whose efficiency and luminance reach three times efficiency and four time of that of a conventional single-unit device respectively, is obtained by controling WO3 thickness. The device is fabricated by Eu（DBM）3bath and DCJTI units, with a structure of ITO/TPD/DCJTI ： CBP/BCP/Alq3/Alq3 ： Mg/WO3/TPD/Eu （DgM）3bath ： TPD/Eu （DBM）3bath/LiF/AI and the maximum luminance of 8609 cd/m^2 and the maximum efficiency of 10. 2 cd/A are achieved.