Light-emitting elements comprising iridium organometallic complexes comprising 4-arylpyrimidines

摘要

Provided is a novel substance that can emit phosphorescence. Alternatively, provided is a novel substance with high emission efficiency. An organometallic complex in which a 4-arylpyrimidine derivative is a ligand and iridium is a central metal is provided. Specifically, an organometallic complex having a structure represented by a general formula (G1) is provided. In the general formula (G1), R1 represents a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 10 carbon atoms, R2 represents any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted phenyl group, R3 represents hydrogen or a substituted or unsubstituted alkyl group having 1 to 4 carbon atoms, and Ar1 represents a substituted or unsubstituted arylene group having 6 to 10 carbon atoms.;

主权项

1. A light-emitting element comprising an organometallic complex between a pair of electrodes, wherein the organometallic complex comprises a structure represented by a formula (G1), wherein R1 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 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, wherein R2 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 R3 represents hydrogen or an alkyl group having 1to 4 carbon atoms, wherein Ar1 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.