Composition containing polymer compound and light-emitting device using the same

A polymer compound wherein:

• the polymer compound substantially consisting of constitutional units that are selected from among a constitutional unit represented by Formula (1)-1, a constitutional unit represented by Formula (1)-2, a constitutional unit represented by Formula (2)-1, a constitutional unit represented by Formula (2)-2, and a constitutional unit derived from a phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm;
• and
• the polymer compound containing at least the constitutional unit represented by Formula (1)-1, the constitutional unit represented by Formula (1)-2, and the constitutional unit derived from the phosphorescent light-emitting compound that has a light-emitting spectrum peak at smaller than 480 nm;
• wherein
• R1 represents an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, or a cyano group, and two or more R1s that are present in the polymer compound may be the same as or different from each other;
• R2 represents a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an alkoxy group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, a fluorine atom, or a cyano group, and two or more R2s that are present in the polymer compound may be the same as or different from each other;
• R3 represents an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, or an aralkyl group, and when two or more R3s are present in the polymer compound, R3s may be the same as or different from each other;
• R4 and R5 each independently represent a hydrogen atom, an alkyl group, an aryl group, a monovalent aromatic heterocyclic group, an alkoxy group, an aryloxy group, an aralkyl group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, a fluorine atom, or a cyano group, and when two or more R4s are present in the polymer compound, R4s may be the same as or different from each other, and two or more R5s that are present in the polymer compound may be the same as or different from each other;
• R6 represents a hydrogen atom, an alkoxy group, or a fluorine atom, and two or more R6s that are present in the polymer compound may be the same as or different from each other;
• and
• R7 represents a hydrogen atom, an alkoxy group, an aryloxy group, an arylalkoxy group, a substituted amino group, a substituted carbonyl group, a formyl group, a substituted carboxyl group, or a fluorine atom and when two or more R7s are present in the polymer compound, R7s may be the same as or different from each other.