| 摘要 |
PROBLEM TO BE SOLVED: To provide a cascaded organic electroluminescent device with connecting units having improved voltage stability. SOLUTION: This device comprises an anode, an cathode, 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, and a connecting unit disposed between each adjacent organic electroluminescent units, wherein the connecting unit comprises, in sequence, an n-type doped organic layer, and an interfacial layer, and a p-type doped organic layer, and wherein the interfacial layer prevents diffusion or reaction between the n-type doped organic layer and the p-type doped organic layer. COPYRIGHT: (C)2005,JPO&NCIPI
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