An OLED device comprises a cathode, an anode, and having therebetween a light emitting layer, the device further comprising a layer on the cathode side of the emitting layer containing an anthracene compound bearing a diarylamine group; provided either (1) there is present an organic layer contiguous to the cathode that is substantially free of an anthracene compound bearing a diarylamine group, or (2) there are present independently selected diarylamine groups in both the 9- and 10-positions of the anthracene. The invention provides an improved combination of efficiency, operational lifetime, and lower operational voltage.
一种OLED器件包括阴极、阳极和介于其之间的发光层,该器件还包括在发光层阴极侧的层,其含有一个带有二芳胺基团的
蒽醌化合物;提供(1)与阴极相接触的有机层基本上不含有带有二芳胺基团的
蒽醌化合物,或(2)在
蒽醌中的9-和10-位置分别存在独立选择的二芳胺基团。该发明提供了更高的效率、操作寿命和更低的操作电压的改进组合。