Patent ID: 8142908

Claim:
A polymer light emitting material consisting essentially of a compound exhibiting light emission from the triplet excited state and either (a) a polymer compound consisting essentially of a repeating unit represented by the formula (4) and having a polystyrene-reduced number-average molecular weight of 10 3 to 10 8 , or (b) a polymer compound consisting essentially of a repeating unit represented by the formula (4) and a repeating unit selected from the group consisting of groups (5), (6), (7) or (8) and having a polystyrene-reduced number-average molecular weight of 10 3 to 10 8 —[—wherein R 11 and R 12 each independently represent a hydrogen atom, halogen atom, alkyl group, aryl group, arylalkyl group or monovalent heterocyclic group; R 11 and R 12 may mutually be connected to form a ring; and X 5 represents O; R 13 , R 14 , R 15 , R 16 , R 17 and R 18 each independently represent a hydrogen atom, halogen atom, alkyl group, alkyloxy group, alkylthio group, aryl group, aryloxy group, arylthio group, arylalkyl group, arylalkyloxy group, arylalkylthio group, acyl group, acyloxy group, amide group, acid imide group, imine residue, amino group, substituted amino group, substituted silyl group, substituted silyloxy group, substituted silylthio group, substituted silylamino group, monovalent heterocyclic group, heteroaryloxy group, heteroarylthio group, arylalkenyl group, arylethynyl group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, arylalkyloxycarbonyl group, heteroaryloxycarbonyl group or cyano group; and (R 14 and R 15 ) or (R 16 and R 17 ) may mutually be connected to form a ring—]—; —Ar 5 — (5) —Ar 5 —X 6 —(Ar 6 —X 7 ) a —Ar 7 — (6) —Ar 5 —X 7 — (7) —X 7 — (8) —[—wherein Ar 5 , Ar 6 and Ar 7 each independently represent an arylene group selected from the group consisting of phenylene group, biphenylene group, fluorene-diyl group and stilbene-diyl group; X 6 represents —C≡C—, —N(R 21 )—or —(SiR 22 R 23 ) b —; X 7 represents —CR 19 ═CR 20 —, —C≡C—, —N(R 21 )—or —(SiR 22 R 23 ) b —; R 19 and R 20 each independently represent a hydrogen atom, alkyl group, aryl group, monovalent heterocyclic group, carboxyl group, alkoxycarbonyl group, aryloxycarbonyl group, arylalkyloxycarbonyl group, heteroaryloxycarbonyl group or cyano group; R 21 , R 22 and R 23 each independently represent a hydrogen atom, alkyl group, aryl group, monovalent heterocyclic group or arylalkyl group; and a represents an integer of 0 or 1 and b represents an integer of 1 to 12—]—.