利用Al/MoO3作为全反射阳极、Al/LiF作为半透明阴极制备了高性能的Alq3基顶发射有机发光器件。研究了在金属阴极表面分别生长高折射率的材料Alq3和MoO3作为出光耦合层后,对器件性能的影响。经过优化后的器件,其电流效率最大值达到6.43 cd/A,并且微腔器件的角度依赖问题也基本得到了解决。这些结果将为制备高性能的顶发射器件提供了新的设计思路。

High-performance top-emitting organic light-emitting diodes (TEOLEDs) using Al/MoO3 as reflective anode and LiF/Al as semitransparent cathode and Alq3 as emitter were fabricated. At the same time, the influence of adding Alq3 and MoO3 having high refractive index as the out-coupling layer on the device performances was studied respectively. The maximum current efficiency of the optimized device reached 6.43 cd/A. Besides, the angular dependence of microcavity OLEDs was almost resolved. We believe that these results can provide new guides for device design of high-performance top-emitting OLEDs.