Light-emitting element, compound, organic compound, display module, lighting module, light-emitting device, display device, lighting device, and electronic device
A light-emitting element having high emission efficiency is provided. A light-emitting element having a low driving voltage is provided. A novel compound which can be used for a transport layer or as a host material or a light-emitting material of a light-emitting element is provided. A novel compound with a benzofuropyrimidine skeleton is provided. Also provided is a light-emitting element which includes the compound with the benzofuropyrimidine skeleton between a pair of electrodes.
1. A mixed material comprising:
a first compound; and
a second compound comprising a carbazole skeleton,
wherein the first compound is represented by formula (G1):
wherein A 1 represents a group having 6 to 100 carbon atoms,
wherein the group comprises a heteroaryl group, or an aryl group and the heteroaryl group, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and an aryl group having 6 to 13 carbon atoms.
2. The mixed material according to claim 1 ,
wherein the first compound and the second compound form an exciplex in a light-emitting layer.
3. The mixed material according to claim 1 ,
wherein the first compound is represented by formula (G2):
wherein Ht uni represents any one of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group,
wherein α represents a phenylene group,
wherein n is an integer from 0 to 4, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and an aryl group having 6 to 13 carbon atoms.
4. The mixed material according to claim 3 ,
wherein n is 2.
5. The mixed material according to claim 1 ,
wherein the heteroaryl group comprises at least one of a dibenzothiophenyl group, a dibenzofuranyl group, a carbazolyl group, a benzimidazolyl group, a benzoxazolyl group, and a benzthiazolyl group.
6. A light-emitting device comprising:
a pair of electrodes; and
a light-emitting layer between the pair of electrodes,
wherein the light-emitting layer comprises:
a first compound; and
a second compound comprising a carbazole skeleton,
wherein the first compound is represented by formula (G1):
wherein A 1 represents a group having 6 to 100 carbon atoms,
wherein the group comprises a heteroaryl group, or an aryl group and the heteroaryl group, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and an aryl group having 6 to 13 carbon atoms.
7. The light-emitting device according to claim 6 ,
wherein the first compound and the second compound form an exciplex in the light-emitting layer.
8. The light-emitting device according to claim 6 ,
wherein the first compound is represented by formula (G2):
wherein Ht uni represents any one of a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzofuranyl group, and a substituted or unsubstituted carbazolyl group,
wherein α represents a phenylene group,
wherein n is an integer from 0 to 4, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and an aryl group having 6 to 13 carbon atoms.
9. The light-emitting device according to claim 8 ,
wherein n is 2.
10. The light-emitting device according to claim 6 ,
wherein the heteroaryl group comprises at least one of a dibenzothiophenyl group, a dibenzofuranyl group, a carbazolyl group, a benzimidazolyl group, a benzoxazolyl group, and a benzthiazolyl group.