| http://www.w3.org/ns/prov#value | - Third Embodiment In the third embodiment of the present invention, an organic metal complex containing rare earth metal ions such as an europium complex of tri(1,3-phenyl -1,3-propanedionato)mono(bathophenanthroline) (hereinafter, referred to as ???Eu(DBM)3.BPEHEN???) represented by the following formula: in which one of the ligands is a compound which shows the electron-accepting (-transporting)
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