An electroluminescence device having a layer containing a specific metal coordination
compound is provided. The metal coordination compound is represented by formula
(1) below:
wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L are mutually
different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso
that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown
below and a partial structure MLn is represented by formula
(3) or (4) shown below:
##STR1##
- at least one of the optional substituent(s) of the cyclic groups, and
the cyclic groups CyC1 and CyC2 include an aromatic group capable of
having a substituent represented by the following formula (5):
##STR2##
The metal coordination compound having the aromatic group is effective in providing
high-efficiency luminescence and long-term high luminance.
