Light-emitting device, light-emitting apparatus, electronic device, and lighting device

A light-emitting device comprising:

• an EL layer between a pair of electrodes,
• wherein the EL layer comprises a light-emitting layer, and
• wherein the light-emitting layer comprises:
• an organic compound comprising a naphtho[2′,1′:4,5]furo[2,3-b]pyrazine skeleton;
• and
• an organometallic complex comprising a diazine skeleton.

A light-emitting device comprising:

• an EL layer between a pair of electrodes,
• wherein the EL layer comprises a light-emitting layer,
• wherein the light-emitting layer comprises an organic compound represented by a general formula (G1) and a phosphorescent substance,
• wherein a T1 level of the phosphorescent substance (TG) is lower than or equal to 2.5 eV,
• wherein the TG is a T1 level derived from an absorption edge of an absorption spectrum of the phosphorescent substance, and
• wherein:
• Q represents oxygen or sulfur;
• A represents a group with a molecular weight lower than or equal to 1000;
• and
• R1 to R6 independently represent any one of hydrogen, a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 7 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 30 carbon atoms.