Organometallic complex, light-emitting element, light-emitting device, electronic device, and lighting device

摘要

As a novel substance having a novel skeleton, an organometallic complex with high emission efficiency which achieves improved color purity by a reduction of half width of an emission spectrum is provided. One embodiment of the present invention is an organometallic complex in which a β-diketone and a six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom are ligands. In General Formula (G1), X represents a substituted or unsubstituted six-membered heteroaromatic ring including two or more nitrogen atoms inclusive of a nitrogen atom that is a coordinating atom. Further, R1 to R4 each represent a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms.;

主权项

1. A light-emitting device comprising:
a pair of electrodes; and a layer between the pair of electrodes, the layer containing an organometallic complex represented by formula G1: wherein: X represents any of formulae X1 to X3: R1 to R4 each represent a substituted or unsubstituted alkyl group having 1 to 6 carbons; and R5 to R13 each represent any of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbons, and a substituted or unsubstituted phenyl group.