Triarylamine derivative, light-emitting substance, light-emitting element, light-emitting device, and electronic device
A triarylamine derivative represented by a general formula (G1) given below is provided. Note that in the formula, Ar represents either a substituted or unsubstituted phenyl group or a substituted or unsubstituted biphenyl group; α represents a substituted or unsubstituted naphthyl group; β represents either hydrogen or a substituted or unsubstituted naphthyl group; n and m each independently represent 1 or 2; and R 1 to R 8 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, or a phenyl group.
1. A light-emitting element comprising:
a first electrode;
a hole transporting layer comprising a triarylamine derivative over the first electrode; and
a second electrode,
wherein the triarylamine derivative is represented by a general formula (G1),
wherein Ar represents any of an unsubstituted phenyl group, an unsubstituted biphenyl group, a substituted phenyl group substituted by a phenyl group, and a substituted biphenyl group substituted by a phenyl group,
wherein α represents an unsubstituted naphthyl group or a substituted naphthyl group substituted by a phenyl group,
wherein β represents hydrogen,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent any of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a phenyl group.
2. The light-emitting element according to claim 1 wherein the triarylamine derivative is represented by a formula (31) or (32),
3. The light-emitting element according to claim 1 wherein the triarylamine derivative is represented by a formula (33) or (34),
4. The light-emitting element according to claim 1 , wherein the triarylamine derivative is represented by a formula (40) or (41),
5. The light-emitting element according to claim 1 , wherein the triarylamine derivative is represented by a formula (43) or (44),
6. The light-emitting element according to claim 1 , wherein the layer further comprises a fluorescent light-emitting substance.
7. The light-emitting element according to claim 1 , wherein the layer further comprises a phosphorescent light-emitting substance.