Thiadiazole, compound for light-emitting elements, light-emitting element, light-emitting apparatus, authentication apparatus, and electronic device
The thiadiazole represented by formula (1), when used as a light-emitting material in a light-emitting element, allows the light-emitting element to emit near-infrared light: wherein, in formula (1), each A independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl amino group, or a substituted or unsubstituted triarylamine.
1. A mixture comprising a thiadiazole represented by formula (1):
where each A independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl amino group, or a substituted or unsubstituted triarylamine; and
a compound represented by formula IRH-1:
where n represents a natural number of 1 to 12 and R represents a substituent or a functional group, and each R is independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group.
2. The mixture according to claim 1 , wherein the thiadiazole represented by formula (1) is a compound represented by any of formulae (2) to (4):
where each R independently represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, and there may be a ring formed by a carbon linkage between two adjacent R's.
3. A composition for light-emitting elements comprising the mixture according to claim 1 .
4. A light-emitting material comprising the composition for light-emitting elements according to claim 3 .
5. A light-emitting element comprising:
an anode;
a cathode; and
a light-emitting layer that is disposed between the anode and the cathode and, when electric current flows between the anode and the cathode, emits light,
wherein the light-emitting layer contains a compound represented by formula (1) as a light-emitting material and a compound represented by formula IRH-1 as a host material;
where each A independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl amino group, or a substituted or unsubstituted triarylamine;
where n represents a natural number of 1 to 12 and R represents a substituent or a functional group, and each R is independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group.
6. The light-emitting element according to claim 5 , wherein the compound represented by formula (1) is a compound represented by any of formulae (2) to (4), and
at least one of the compounds represented by formulae (2) to (4) is selected as the light-emitting material;
where each R independently represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, and there may be a ring formed by a carbon linkage between two adjacent R's.
7. The light-emitting element according to claim 5 , wherein the compound represented by formula IRH-1 is a compound represented by formula IRH-2 or IRH-3, and
at least one of the compounds represented by formulae IRH-2 and IRH-3 is selected as the host material;
where each of R 1 to R 4 independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group, with some or all of R 1 to R 4 the same or all of R 1 to R 4 different.
8. The light-emitting element according to claim 5 , further comprising an electron transport layer, which is a layer having the capability of transporting electrons, provided between the cathode and the light-emitting layer so as to be in contact with the light-emitting layer,
wherein the electron transport layer contains a compound having an azaindolizine skeleton and an anthracene skeleton in the molecule as an electron transport material.
9. A light-emitting element comprising:
an anode;
a cathode; and
a light-emitting layer that is disposed between the anode and the cathode and, when electric current flows between the anode and the cathode, emits light,
wherein the light-emitting layer contains a compound represented by formula (1) as a light-emitting material and a compound represented by formula IRH-4 as a host material;
where each A independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl amino group, or a substituted or unsubstituted triarylamine;
where n represents a natural number of 1 to 10 and R represents a substituent or a functional group, and each R is independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group.
10. The light-emitting element according to claim 9 , wherein the compound represented by formula (1) is a compound represented by any of formulae (2) to (4), and
at least one of the compounds represented by formulae (2) to (4) is selected as the light-emitting material;
where each R independently represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group, and there may be a ring formed by a carbon linkage between two adjacent R's.
11. The light-emitting element according to claim 9 , wherein the compound represented by formula IRH-4 is a compound represented by formula IRH-5, IRH-7, or IRH-8, and
at least one of the compounds represented by formulae IRH-5, IRH-7, and IRH-8 is selected as the host material;
where each of R 1 and R 2 independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group, with R 1 and R 2 the same or different.
12. The light-emitting element according to claim 9 , further comprising an electron transport layer, which is a layer having the capability of transporting electrons, provided between the cathode and the light-e ng layer so as to be in contact with the light-emitting layer,
wherein the electron transport layer contains a compound having an azaindolizine skeleton and an anthracene skeleton in the molecule as an electron transport material.
13. A light-emitting element comprising:
an anode;
a cathode;
a light-emitting layer that is disposed between the anode and the cathode and, when electric current flows between the anode and the cathode, emits light; and
an electron transport layer, which is a layer having the capability of transporting electrons, provided between the cathode and the light-emitting layer so as to be in contact with the light-emitting layer;
wherein the light-emitting layer contains a compound represented by formula (1) as a light-emitting material, and
the electron transport layer contains a compound having an azaindolizine skeleton and an anthracene skeleton in the molecule as an electron transport material;
where each A independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted aryl amino group, or a substituted or unsubstituted triarylamine.
14. A light-emitting apparatus comprising the light-emitting element according to claim 5 .
15. A light-emitting apparatus comprising the light-emitting element according to claim 9 .
16. A light-emitting apparatus comprising the light-emitting element according to claim 13 .
17. An authentication apparatus comprising the light-emitting element according to claim 5 .
18. An authentication apparatus comprising the light-emitting element according to claim 9 .
19. An authentication apparatus comprising the light-emitting element according to claim 13 .
20. An electronic device comprising the light-emitting element according to claim 5 .
21. An electronic device comprising the light-emitting element according to claim 9 .
22. An electronic device comprising the light-emitting element according to claim 13 .