Organic Compound, Light-Emitting Element, Light-Emitting Device, Electronic Device, Display Device, and Lighting Device

A light-emitting element comprising:

• a first electrode;
• a hole-injection layer over the first electrode, the hole-injection layer comprising an organic compound having one of a halogen group and a cyano group;
• a first hole-transport layer over the hole-injection layer, the first hole-transport layer comprising a triarylamine compound;
• a second hole-transport layer over and in contact with the first hole-transport layer;
• a light-emitting layer over and in contact with the second hole-transport layer, the light-emitting layer comprising a first host compound and a second host compound;
• and
• a second electrode over the light-emitting layer,
• wherein the first host compound and the second host compound are configured to form an exciplex,
• wherein the triarylamine compound comprises:
• a nitrogen atom;
• a first aryl group comprising a first benzene ring, a first naphthalene ring and a second naphthalene ring;
• a second aryl group bonding to the nitrogen atom;
• and
• a third aryl group bonding to the nitrogen atom,
• wherein the first naphthalene ring and the second naphthalene ring bond to each other, and
• wherein each of the first naphthalene ring and the nitrogen atom bonds to the first benzene ring.