| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic electroluminescence element which can emit light at high luminance and high efficiency, prevents a driving voltage from increasing, an undesirable voltage rise from occurring, and a fault such as a short circuit from occurring, and has good productivity. SOLUTION: An organic electroluminescence element A is formed by laminating a plurality of light emitting layers 4 via a middle layer 3 including a metal or a metal oxide in the whole between an anode 1 and a cathode 2. The middle layer 3 is composed of a plurality of layers which include mixture layers containing a mixture of a conductive metal oxide and an inorganic insulator. A layer on the nearest side to the anode 1 in the middle layer 3 has a higher electron injection property than a layer on the nearest side to the cathode 2, and a layer on the nearest side to the cathode 2 in the middle layer 3 has a higher hole injection property than a layer on the nearest side to the anode 1. COPYRIGHT: (C)2008,JPO&INPIT
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