Patent ID: 8330357

Claim:
A light-emitting element comprising: a light-emitting layer containing an organic compound provided between a first electrode layer and a second electrode layer; and a functional layer containing a mixed-valence compound on at least one of the first electrode layer side and the second electrode layer side of the light-emitting layer, wherein the mixed-valence compound includes a metal element, and the metal element has two or more different valences, and wherein the mixed-valence compound includes at least one of vanadium oxide, strontium titanate, magnetite, magnetic ferrite, nickel ferrite, rhenium oxide, europium oxide, lithium titanate, manganese oxide, cobalt oxide, antimony oxide, lead oxide, europium sulfide, copper sulfide, gallium sulfide, thallium sulfide, silver fluoride, indium halide, tantalum chloride, thallium chloride, gallium chloride, indium nitride, tin nitride, tungsten oxide, and molybdenum oxide.