A cascaded organic electroluminescent device includes an anode, a cathode, and a plurality of organic electroluminescent units disposed between the anode and the cathode, wherein the organic electroluminescent units comprise at least a hole-transporting layer and an electron-transporting layer. The device also includes a connecting unit disposed between each adjacent organic electroluminescent unit, wherein the connecting unit comprises, in sequence, an n-type doped organic layer, and a p-type doped organic layer wherein the p-type doped organic layer includes a dihydrophenazine derivative compound.
级联有机电致发光器件包括阳极、阴极和多个有机电致发光单元,这些单元位于阳极和阴极之间,其中有机电致发光单元至少包括一个空穴传输层和一个电子传输层。该器件还包括连接单元,该连接单元位于相邻的有机电致发光单元之间,其中连接单元依次包括n型掺杂有机层和p型掺杂有机层,其中p型掺杂有机层包括二氢苯并咔啉衍
生物化合物。