Patent ID: 7943963

Claim:
An organic light-emitting display device comprising: an organic light-emitting layer; an upper electrode and a lower electrode between which the organic light-emitting layer is sandwiched, wherein a light emitted from the organic light-emitting layer is taken out from the upper electrode side; and an insulating film covering an edge of the lower electrode, wherein the organic light-emitting layer and a buffer layer are formed on the insulating film, said buffer layer is mainly composed of an oxide having a Gibbs free energy generated at a melting point being lower than Gibbs free energy of the upper electrode material, said buffer layer comprises at least one component selected from the group consisting of an oxide of vanadium, an oxide of tungsten and an oxide of molybdenum, said buffer layer is provided between said organic light-emitting layer and said upper electrode, and the upper electrode is a transparent electrode of an oxide.