Patent ID: 8362465

Claim:
An organic EL light-emitting material comprising at least one kind of metal pyrazole complex represented by one of general formulae (1) and (2): wherein at least one of R 1 , R 2 , and R 3 represents a branched alkyl group having 1 to 18carbon atoms, and any remaining ones of R 1 , R 2 , and R 3 independently represent a hydrogen atom, a branched or linear alkyl group having 1 to 18 carbon atoms, a branched or linear halogen-substituted alkyl group having 1 to 18 carbon atoms, a phenyl group, a halogen-substituted phenyl group, a halogen atom, an ester group having 1 to 12 carbon atoms, an alkyl sulfide group, an ether group or an amide group; n represents an integer of 3 to 6; and M is selected from Au, Ag and Cu, wherein at least one of R 1 , R 2 , and R 3 represents a branched alkyl group having 1 to 18 carbon atoms, and any remaining ones of R 1 , R 2 , and R 3 independently represent a hydrogen atom, a branched or linear alkyl group having 1 to 18 carbon atoms, a branched or linear halogen-substituted alkyl group having 1 to 18 carbon atoms, a phenyl group, a halogen-substituted phenyl group, a halogen atom, an ester group having 1 to 12 carbon atoms, an alkyl sulfide group, an ether group or an amide group; n represents a positive integer; and M is selected from Au, Ag and Cu.