Thiadiazole, light-emitting element, light-emitting apparatus, authentication apparatus, and electronic device
The thiadiazole represented by formula (2) or (4), when used as a light-emitting material in a light-emitting element, allows the light-emitting element to emit near-infrared light: in formulae (2) and (4), each R independently represents a hydrogen atom, an alkyl group, or a substituted or unsubstituted aryl group. There may be a ring formed by a carbon linkage between two adjacent R's.
1. A thiadiazole represented by formula D-1 or (4):
wherein each R independently represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a ring group, wherein the ring group includes two adjacent carbon atoms that bond to each other.
2. 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 the thiadiazole according to claim 1 .
3. 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 electron transport layer contains a compound having an azaindolizine skeleton and an anthracene skeleton in the molecule as an electron transport material, and
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 for the light-emitting 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 is independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group.
4. The light-emitting element according to claim 3 , wherein the compound 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, a substituted or unsubstituted aryl group, or a ring group, wherein the ring group includes two adjacent carbon atoms that bond to each other.
5. The light-emitting element according to claim 3 , wherein the compound represented by formula IRH-1, the host material, is a compound represented by formula IRH-2;
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.
6. The light-emitting element according to claim 3 , wherein the compound represented by formula IRH-1, the host material, is a compound represented by formula IRH-3;
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.
7. 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.
8. The light-emitting element according to claim 7 , wherein the compound 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, a substituted or unsubstituted aryl group, or a ring group, wherein the ring group includes two adjacent carbon atoms that bond to each other.
9. The light-emitting element according to claim 7 , wherein the light-emitting layer contains a compound represented by formula IRH-4 as a host material for the light-emitting material;
where n represents a natural number of 1 to 10 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. 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 electron transport layer contains a compound having an azaindolizine skeleton and an anthracene skeleton in the molecule as an electron transport material, and
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 for the light-emitting 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 each R is independently a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aryl amino group.
11. The light-emitting element according to claim 10 , wherein the compound 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, a substituted or unsubstituted aryl group, or a ring group, wherein the ring group includes two adjacent carbon atoms that bond to each other.
12. The light-emitting element according to claim 10 , wherein the compound represented by formula IRH-4, the host material, is a compound represented by formula IRH-5;
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.
13. The light-emitting element according to claim 10 , wherein the compound represented by formula IRH-4, the host material, is a compound represented by formula IRH-7;
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.
14. The light-emitting element according to claim 10 , wherein the compound represented by formula IRH-4, the host material, is a compound represented by formula IRH-8;
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.
15. A light-emitting apparatus comprising the light-emitting element according to claim 3 .
16. An authentication apparatus comprising the light-emitting element according to claim 3 .
17. An authentication apparatus comprising the light-emitting element according to claim 7 .
18. An authentication apparatus comprising the light-emitting element according to claim 10 .
19. An electronic device comprising the light-emitting element according to claim 3 .