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: wherein 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 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 any of formulae (2) to (4) as a light-emitting material and a compound represented by formula IRH-2 as a host material for the light-emitting material;
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;
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.
2. The light-emitting element according to claim 1 , wherein the compound represented by formula IRH-2, 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.
3. 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 any of formulae (2) to (4) as a light-emitting material as a light-emitting material and a compound represented by formula IRH-5 as a host material for the light-emitting material;
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;
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.
4. 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 any of formulae (2) to (4) as a light-emitting material as a light-emitting material and a compound represented by formula IRH-7 as a host material for the light-emitting material;
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;
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.
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 any of formulae (2) to (4) as a light-emitting material as a light-emitting material and a compound represented by formula IRH-8 as a host material for the light-emitting material;
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;
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.
6. A light-emitting apparatus comprising the light-emitting element according to claim 1 .
7. An electronic device comprising the light-emitting apparatus according to claim 6 .
8. A light-emitting apparatus comprising the light-emitting element according to claim 2 .
9. A light-emitting apparatus comprising the light-emitting element according to claim 3 .
10. A light-emitting apparatus comprising the light-emitting element according to claim 4 .
11. A light-emitting apparatus comprising the light-emitting element according to claim 5 .