JP2006074023A5 - - Google Patents

Claims (21)

And an anode, between the cathode, the first layer including a luminescent substance, a second layer containing an N-type semiconductor, a third layer composed of a transparent conductive film, a fourth containing a hole-transporting medium have of a layer, the,
The cathode has a layer comprising a reflective metal;
Emitting element, characterized in that the first layer and the second layer the third layer the the fourth layer and the cathode are provided in this order. The light-emitting element according to claim 1 , wherein the N-type semiconductor included in the second layer is a metal oxide. 3. The N-type semiconductor contained in the second layer according to claim 1 , wherein the N-type semiconductor is one or more compounds selected from the group consisting of zinc oxide, tin oxide, and titanium oxide. A light emitting element. And an anode, between the cathode, the first layer including a luminescent substance, a second layer comprising a material of an organic compound and an electron donative, a third layer composed of a transparent conductive film, Hall a fourth layer including a transport medium, and
The cathode has a layer comprising a reflective metal;
Emitting element, characterized in that the first layer and the second layer the third layer the the fourth layer and the cathode are provided in this order. According to claim 4, wherein the organic compound contained in the second layer emitting element characterized in that an organic compound having an electron transporting property. 5. The light-emitting element according to claim 4 , wherein the organic compound included in the second layer is a metal complex having a ligand including a π-conjugated skeleton. In the claims 4 to any one of claims 6, substances showing the electron donating, light emitting element, characterized in that an alkali metal or alkaline earth metal or rare earth metal. In the claims 4 to any one of claims 6, substances showing the electron donating, Li, Cs, Mg, Ca , Ba, Er, any one or two or more metals selected from the group consisting of Yb A light emitting element characterized by the above. 9. The light-emitting element according to claim 1 , wherein the reflective metal is aluminum, silver, an alloy containing aluminum, or an alloy containing silver. In any one of claims 1 to 9, wherein the transparent conductive film, indium tin oxide, or silicon indium tin oxide containing, or indium oxide containing 2 to 20% of zinc oxide one A light emitting element characterized by the above. In any one of claims 1 to 10, hole-transporting medium contained in the fourth layer is the light emitting device characterized and Turkey, such an inorganic compound. 12. The light-emitting element according to claim 11 , wherein the inorganic compound is one or more compounds selected from the group consisting of vanadium oxide, chromium oxide, molybdenum oxide, cobalt oxide, and nickel oxide. In any one of claims 1 to 10, wherein the fourth hole-transporting medium in the layer of the light emitting element characterized and Turkey, such an organic compound. According to claim 13, wherein the organic compound, the light emitting device characterized and Turkey which have a aromatic amine skeleton. In any one of claims 1 to 10, the light emitting element, characterized in that the hole-transporting medium contained in the fourth layer is a material doped with a substance showing an electron accepting property to the organic compound. The light-emitting element according to claim 15 , wherein the organic compound is a hole transporting material. According to claim 15 or claim 16, wherein the organic compound, the light emitting device characterized and Turkey which have a aromatic amine skeleton. In any one of claims 15 to 17, materials showing the electron accepting property, the light-emitting element which is a metal oxide. In any one of claims 15 to 17, and wherein the substance exhibiting the electron accepting property is any one or more compounds selected from the group consisting of molybdenum oxide, vanadium oxide, rhenium Light emitting element. A light-emitting device using the light-emitting element according to claim 1 . An electric device using the light-emitting device according to claim 20 for a display portion.