| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic EL element of simple structure which can maintain light emission efficiency. SOLUTION: The organic EL element comprises a first electrode, an organic material layer stacked to contain at least an organic light emitting layer, and a second electrode, stacked in this order. The organic EL element comprises a light scattering layer containing a rough interface which constitutes a rough surface and is arranged at least on one outside of the first and second electrodes so that the light emitted from the organic light emitting layer penetrates. The organic material layer has such film thickness as satisfies the relationship of d≥5×Ra (where, d is average film thickness of organic material layer, and Ra is average roughness of a rough interface). COPYRIGHT: (C)2008,JPO&INPIT
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