| 摘要 |
PROBLEM TO BE SOLVED: To provide a light emission element having high-efficient light emission, capable of keeping high luminance for a long time and little in current passing deterioration. SOLUTION: The light emission element has an organic-compound layer containing a metal coordination compound of general formula (1) (wherein, M is Ir, Pt, Rh or Pd; n=2 or 3; R1 and R2 are each independently H or a 1-20C normal or branched alkyl; and the ring A is a cyclic group having a nitrogen atom linked to M, and it may have a substituent).
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