| 摘要 |
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element emitting yellow-red- colored light with stable light emitting property for long time. SOLUTION: The organic electroluminescent element has a light emitting layer 3 in which, naphthacene derivative shown by the formula (1) is contained. In the formula (1), X<SP>1</SP>, X<SP>2</SP>represent oxygen atom, sulfur atom, NH group, or the like, R<SP>1</SP>-R<SP>18</SP>represent hydrogen atom, halogen atom, or phenyl group. COPYRIGHT: (C)2003,JPO
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