Patent ID: 8492007

Claim:
A polymeric light-emitting substance wherein said light-emitting substance has an iridium complex structure showing light emission from triplet excited state in the main chain or side chain, and has a monovalent group represented by the following general formula (1) or (2): wherein A is a single bond or a divalent group derived from conjugate system, R 1 and R 2 each independently represent a halogen atom, alkyl group, alkoxy group, alkylthio group, alkylamino group, alkylsilyl group, aryl group, aryloxy group, arylthio group, arylamino group, arylsilyl group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkylamino group, arylalkyl silyl group, acyl group, acyloxy group, imino group, amide group, arylalkenyl group, arylalkynyl group, cyano group, or a monovalent heterocyclic group, R 3 represents alkyl group, aryl group, arylalkyl group, arylalkenyl group, arylalkynyl group, or a monovalent heterocyclic group, a represents an integer of 0 to 3, b represents an integer of 0 to 4, and when a is two or more, a plurality of R 1 s may be the same or different and when b is two or more, a plurality of R 2 s may be the same or different; wherein D is a single bond or a divalent group derived from conjugate system, R 4 and R 5 each independently represent a halogen atom, alkyl group, alkoxy group, alkylthio group, alkylamino group, alkylsilyl group, aryl group, aryloxy group, arylthio group, arylamino group, arylsilyl group, arylalkyl group, arylalkoxy group, arylalkylthio group, arylalkylamino group, arylalkylsilyl group, acyl group, acyloxy group, imino group, amide group, arylalkenyl group, arylalkynyl group, cyano group, or a monovalent heterocyclic group, c and d each independently represent an integer of 0 to 4, and when c is two or more, a plurality of R 4 s may be the same or different; when d is two or more, a plurality of R 5 s may be the same or different; wherein the main chain of said light-emitting substance is a conjugated type polymeric light-emitting substance, and contains a repeating unit represented by the following general formula (14), —Ar 6 CR 20 ═CR 21 n (14) wherein Ar 6 represents an arylene group or a divalent heterocyclic group, n is 0 or 1, R 20 and R 21 each independently represent a hydrogen atom, alkyl group, aryl group, arylalkyl group, arylalkenyl group, arylalkynyl group, monovalent heterocyclic group, or cyano group, and at least one of R 20 , R 21 , or a substituent on Ar 6 , represents a group represented by the above formula (1) or (2).