Light-Emitting Element, Light-Emitting Device, Display Device, Electronic Appliance, and Lighting Device

A light-emitting element comprising:

• a first electrode,
• a second electrode, and
• an electroluminescence layer interposed between the first electrode and the second electrode,
• wherein the electroluminescence layer comprises a light-emitting layer including a first light-emitting layer and a second light-emitting layer over the first light-emitting layer,
• wherein the first light-emitting layer contains a first organic compound, a second organic compound, and a fluorescent substance,
• wherein the second light-emitting layer contains a third organic compound and a phosphorescent substance,
• wherein a combination of the first organic compound and the second organic compound forms a first exciplex, and
• wherein the first organic compound and the second organic compound are mixed in the first light-emitting layer to form a single light-emitting layer.

A light-emitting element comprising:

• a first electrode,
• a second electrode, and
• an electroluminescence layer interposed between the first electrode and the second electrode,
• wherein the electroluminescence layer comprises a light-emitting layer including a first light-emitting layer and a second light-emitting layer over the first light-emitting layer,
• wherein the first light-emitting layer contains a first organic compound, a second organic compound, and a fluorescent substance,
• wherein the second light-emitting layer contains a third organic compound, a fourth organic compound, and a phosphorescent substance,
• wherein a combination of the first organic compound and the second organic compound fours a first exciplex, and
• wherein a combination of the third organic compound and the fourth organic compound forms a second exciplex.

A light-emitting element comprising:

• a first electrode,
• a second electrode, and
• an electroluminescence layer interposed between the first electrode and the second electrode,
• wherein the electroluminescence layer comprises a light-emitting layer including a first light-emitting layer and a second light-emitting layer over the first light-emitting layer,
• wherein the first light-emitting layer contains a first organic compound, a second organic compound, and a fluorescent substance including a substance exhibiting delayed, fluorescence,
• wherein the second light-emitting layer contains a third organic compound and a phosphorescent substance,
• wherein a combination of the first organic compound and the second organic compound forms a first exciplex, and
• wherein the first organic compound and the second organic compound are mixed in the first light-emitting layer to fot it a single light-emitting layer.