Oxadiazole derivative, and light-emitting element, light-emitting device, electronic device, and lighting device using the oxadiazole derivative
An object of one embodiment of the present invention is to provide a novel oxadiazole derivative as a substance having high excitation energy, in particular, a substance having high triplet excitation energy. One embodiment of the present invention is an oxadiazole derivative represented by General Formula (G1) below. In General Formula (G1), R 1 represents either an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), R 21 to R 27 separately represent any one of a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms. In General Formula (G1), α represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms. In General Formula (G1), Z represents either a sulfur atom or an oxygen atom.
1. An oxadiazole derivative represented by General Formula (G1),
wherein:
R 1 represents an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms;
R 21 to R 27 separately represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms;
α represents a substituted or unsubstituted arylene group having 6 to 13 carbon atoms; and
Z represents a sulfur atom or an oxygen atom.
2. The oxadiazole derivative according to claim 1 , wherein α represents a substituted or unsubstituted biphenyldiyl group.
3. The oxadiazole derivative according to claim 1 , wherein α represents a substituted phenylene group.
4. The oxadiazole derivative according to claim 1 , wherein α represents any one of structures represented by Structural Formulae (1-1) to (1-15),
5. A light-emitting element comprising the oxadiazole derivative according to claim 1 .
6. A light-emitting device comprising the light-emitting element according to claim 5 .
7. A lighting device comprising the light-emitting device according to claim 6 .
8. An electronic device comprising the light-emitting device according to claim 6 .
9. An oxadiazole derivative represented by General Formula (G1-1),
wherein:
R 1 represents an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms;
R 21 to R 27 separately represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms; and
Z represents a sulfur atom or an oxygen atom.
10. A light-emitting element comprising the oxadiazole derivative according to claim 9 .
11. A light-emitting device comprising the light-emitting element according to claim 10 .
12. A lighting device comprising the light-emitting device according to claim 11 .
13. An electronic device comprising the light-emitting device according to claim 11 .