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 device comprising:
a first electrode;
a second electrode;
a light-emitting layer between the first electrode and the second electrode; and
a layer comprising a compound between the first electrode and the light-emitting layer,
wherein the light-emitting layer comprises a fluorescent light-emitting substance having an emission wavelength of 450 nm or more,
wherein the layer is in contact with the light-emitting layer,
wherein the compound is represented by a general formula (G1),
wherein Ar represents any one of substituents represented by structural formulae (Ar-1) to (Ar-4),
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a phenyl group.
2 . A light-emitting device comprising:
a first electrode;
a second electrode;
a light-emitting layer between the first electrode and the second electrode; and
a layer comprising a compound between the first electrode and the light-emitting layer,
wherein the light-emitting layer comprises a phosphorescent light-emitting substance having an emission wavelength of 470 nm or more,
wherein the layer is in contact with the light-emitting layer,
wherein the compound is represented by a general formula (G1),
wherein Ar represents any one of substituents represented by structural formulae (Ar-1) to (Ar-4),
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a phenyl group.
3 . A light-emitting device comprising:
a first electrode;
a second electrode;
a light-emitting layer between the first electrode and the second electrode; and
a layer comprising a compound between the first electrode and the light-emitting layer,
wherein the light-emitting layer comprises a light-emitting substance comprising iridium,
wherein the layer is in contact with the light-emitting layer,
wherein the compound is represented by a general formula (G1),
wherein Ar represents any one of substituents represented by structural formulae (Ar-1) to (Ar-4),
wherein α represents a first naphthyl group,
wherein when the first naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein β represents hydrogen or a second naphthyl group,
wherein when the second naphthyl group has a substituent, the substituent is an alkyl group having 1 to 6 carbon atoms or a phenyl group,
wherein n and m each independently represent 1 or 2, and
wherein R 1 to R 8 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, and a phenyl group.
4 . The light-emitting device according to claim 1 , wherein the first naphthyl group is represented by structural formulae (x-1) or (a-2),
5 . The light-emitting device according to claim 1 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3),
6 . The light-emitting device according to claim 1 , wherein each of n and m in the general formula (G1) represents 1.
7 . The light-emitting device according to claim 1 , wherein the light-emitting layer further comprises a host material.
8 . The light-emitting device according to claim 7 , wherein the host material comprises an anthracene derivative.
9 . The light-emitting device according to claim 2 , wherein the first naphthyl group is represented by structural formulae (x-1) or (a-2),
10 . The light-emitting device according to claim 2 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3),
11 . The light-emitting device according to claim 2 , wherein each of n and m in the general formula (G1) represents 1.
12 . The light-emitting device according to claim 2 , wherein the light-emitting layer further comprises a host material.
13 . The light-emitting device according to claim 12 , wherein the host material comprises an anthracene derivative.
14 . The light-emitting device according to claim 3 , wherein the first naphthyl group is represented by structural formulae (a-1) or (a-2),
15 . The light-emitting device according to claim 3 , wherein the second naphthyl group is represented by structural formulae (β-2) or (β-3),
16 . The light-emitting device according to claim 3 , wherein each of n and m in the general formula (G1) represents 1.
17 . The light-emitting device according to claim 3 , wherein the light-emitting layer further comprises a host material.
18 . The light-emitting device according to claim 17 , wherein the host material comprises an anthracene derivative.