| abstract |
A composition is provided containing a phosphorescent compound and a polymer compound having a constitutional unit represented by the formula (Y): n Ar Y1 (Y)n n wherein Ar Y1 represents an arylene group, a divalent heterocyclic group or the like; and at least one constitutional unit selected from the constitutional units represented by the formulas (Ia) to (Id): n n n n n n n n n n wherein m represents an integer of 0 to 4, n represents an integer of 0 to 3, R T1 represents an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, R x represents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, a monovalent heterocyclic group or the like, Ar represents an aromatic hydrocarbon group or a heterocyclic group, nA and nB represent an integer of 0 to 3, and L A and L B represent an alkylene group, a cycloalkylene group, an arylene group or a divalent heterocyclic group. |