Material for light-emitting element, light-emitting element, light-emitting device, electronic device, and lighting device

A light-emitting device comprising:

• a first electrode;
• a first light-emitting unit over the first electrode;
• a charge generation layer over the first light-emitting unit;
• a second light-emitting unit over the charge generation layer;
• and
• a second electrode over the second light-emitting unit,
• wherein the first light-emitting unit comprises a material represented by a general formula (G1), and
• wherein:
• Ar1 represents a substituted or unsubstituted aryl group having 6 to 13 carbon atoms;
• Ar2, Ar3, and Ar4 each independently represent a substituted or unsubstituted arylene group having 6 to 13 carbon atoms;
• R1 to R8 independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms;
• R11 represents an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms;
• and
• R12 represents an alkyl group having 1 to 4 carbon atoms or a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.