Patent ID: 8921548

Claim:
An organometallic complex comprising a structure represented by formula (G1), wherein R 1 represents an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms, wherein the substituted aryl group having 6to 10 carbon atoms is substituted by one or more alkyl groups each having 1 to 4 carbon atoms, one or more alkoxy groups each having 1 to 4 carbon atoms, one or more alkylthio groups each having 1 to 4 carbon atoms, one or more aryl groups each having 6 to 10 carbon atoms, one or more halogen groups, or one or more haloalkyl groups each having 1 to 4 carbon atoms, wherein R 2 represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted phenyl group, wherein the substituted phenyl group is substituted by one or more alkyl groups each having 1 to 4 carbon atoms, one or more alkoxy groups each having 1 to 4 carbon atoms, one or more alkylthio groups each having 1 to 4 carbon atoms, one or more aryl groups each having 6 to 10 carbon atoms, one or more halogen groups, or one or more haloalkyl groups each having 1 to 4 carbon atoms, wherein R 3 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, wherein Ar 1 represents a substituted or unsubstituted arylene group having 6 to 10 carbon atoms, and wherein the substituted arylene group having 6 to 10 carbon atoms is substituted by one or more alkyl groups each having 1 to 4 carbon atoms, one or more alkoxy groups each having 1 to 4 carbon atoms, one or more alkylthio groups each having 1 to 4 carbon atoms, one or more aryl groups each having 6 to 10 carbon atoms, one or more halogen groups, or one or more haloalkyl groups each having 1 to 4 carbon atoms.