Light-emitting element

A light-emitting element comprising:

• a first electrode;
• a hole-injection layer over the first electrode;
• a first layer over the hole-injection layer, the first layer containing a first organic compound which has a hole-transport property;
• a light-emitting layer over the first layer, the light-emitting layer containing a phosphorescent compound, the first organic compound, and a second organic compound which has an electron-transport property;
• a second layer over the light-emitting layer, the second layer containing the second organic compound;
• an electron-injection layer over the second layer;
• and
• a second electrode over the electron-injection layer,
• wherein the first organic compound and the second organic compound are selected so that an exciplex is formed therebetween, and
• wherein the phosphorescent compound is an organometallic complex whose absorption originating from a triplet metal-to-ligand charge transfer transition overlaps with an emission of the exciplex.