Light-emitting element, compound, organic compound, display module, lighting module, light-emitting device, display device, lighting device, and electronic device
Alight-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 for a light-emitting element comprising:
a first compound comprising a benzofuropyrimidine skeleton; and
a second compound comprising a carbazolyl group,
wherein the first compound and the second compound form an exciplex in a light-emitting layer of the light-emitting element.
2 . A mixed material for a light-emitting element comprising:
a first compound comprising a benzofuropyrimidine skeleton and a dibenzothiophenyl group, a dibenzofuranyl group, or a carbazolyl group; and
a second compound comprising a carbazolyl group,
wherein the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group is bonded to a pyrimidine skeleton side of the benzofuropyrimidine skeleton.
3 . 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 light-emitting substance;
a first compound comprising a benzofuropyrimidine skeleton and a dibenzothiophenyl group, a dibenzofuranyl group, or a carbazolyl group; and
a second compound comprising a carbazolyl group, and
wherein the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group is bonded to a pyrimidine skeleton side of the benzofuropyrimidine skeleton.
4 . The mixed material for the light-emitting element according to claim 1 ,
wherein the first compound further comprises a dibenzothiophenyl group, a dibenzofuranyl group, or a carbazolyl group, and
wherein the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group is bonded to a pyrimidine skeleton side of the benzofuropyrimidine skeleton.
5 . The light-emitting device according to claim 3 , wherein the first compound and the second compound form an exciplex.
6 . The mixed material for the light-emitting element according to claim 4 ,
wherein the first compound is represented by formula (G1):
wherein A 1 represents a group having 6 to 100 carbon atoms, the group comprising the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a substituted or unsubstituted polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
7 . The mixed material for the light-emitting element according to claim 2 ,
wherein the first compound is represented by formula (G1):
wherein A 1 represents a group having 6 to 100 carbon atoms, the group comprising the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a substituted or unsubstituted polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
8 . The light-emitting device according to claim 3 ,
wherein the first compound is represented by formula (G1):
wherein A 1 represents a group having 6 to 100 carbon atoms, the group comprising the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group, and
wherein R 1 to R 5 separately represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted monocyclic saturated hydrocarbon having 5 to 7 carbon atoms, a substituted or unsubstituted polycyclic saturated hydrocarbon having 7 to 10 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.
9 . The mixed material for the light-emitting element according to claim 4 ,
wherein the first compound further comprises a phenylene group on the pyrimidine skeleton side of the benzofuropyrimidine skeleton.
10 . The mixed material for the light-emitting element according to claim 2 ,
wherein the first compound further comprises a phenylene group on the pyrimidine skeleton side of the benzofuropyrimidine skeleton.
11 . The light-emitting device according to claim 3 ,
wherein the first compound further comprises a phenylene group on the pyrimidine skeleton side of the benzofuropyrimidine skeleton.
12 . The mixed material for the light-emitting element according to claim 4 ,
wherein the first compound further comprises a phenylene group between the benzofuropyrimidine skeleton and the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group.
13 . The mixed material for the light-emitting element according to claim 2 ,
wherein the first compound further comprises a phenylene group between the benzofuropyrimidine skeleton and the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group.
14 . The light-emitting device according to claim 3 ,
wherein the first compound further comprises a phenylene group between the benzofuropyrimidine skeleton and the dibenzothiophenyl group, the dibenzofuranyl group, or the carbazolyl group.
15 . The light-emitting device according to claim 3 ,
wherein the light-emitting substance is a fluorescent substance.
16 . The light-emitting device according to claim 3 ,
wherein the light-emitting substance is a phosphorescent substance.