Patent ID: 7880378

Claim:
A luminous device comprising: an anode; a cathode; an organic compound layer provided between said anode and said cathode; and a conductive film comprising an inorganic compound provided between said organic compound layer and said cathode, wherein said conductive film comprises a material having a smaller work function than said cathode and an electric conductivity of 1×10 −10 S/m or more, wherein said cathode has a thickness of 1 to 20 nm, wherein said conductive film has a thickness of 1 to 20 nm, wherein said conductive film comprises a boride containing a rare earth element, wherein said cathode is one selected from conductive materials having light-shading property and a high reflectivity, wherein said conductive film is in contact with said cathode, and wherein said cathode is one selected from aluminum, titanium, tungsten or a lamination thereof.