| abstract |
A composition which is useful for providing a light emitting device having excellent light emission efficiency contains a compound represented by formula (C-1) and a phosphorescent compound represented by formula (1): n n n n n n n n n n Ring R 1C to Ring R 4C each represents an aromatic hydrocarbon ring or an aromatic hetero ring, R C represents a carbon, silicon, germanium, tin, or lead atom, and M represents a rhodium, palladium, iridium, or a platinum atom. n 1 represents an integer of 1 or more, and n 2 represents an integer of 0 or more. n 1 +n 2 is 2 or 3. Ring R 1A represents a triazole ring, Ring R 2 represents an aromatic hydrocarbon ring or an aromatic hetero ring, E 1 , E 2 and E 11A to E 13A represent a nitrogen atom or a carbon atom, R 11A to R 13A represent a hydrogen atom, an alkyl group, an aryl group, and A 1 -G 1 -A 2 represents an anionic bidentate ligand. |