| 摘要 |
The present invention provides an organic EL device, which is long-life and has high performance, by optimizing the hole transport layer. An organic electroluminescence device including at least a first electrode 102, an organic electroluminescence medium layer 103 having a hole transport layer 103 a and an organic luminescent layer 103 b, and a second electrode 104 in this order, wherein the hole transport layer 103 a includes associates of a donating molecule and an accepting molecule, and the hole transport layer 103 a has different component ratios of the donating molecule and the accepting molecule between the side of the first electrode 102 and the side of the organic luminescent layer 103 b.
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