Patent ID: 8040044

Claim:
An organic light emitting device comprising: a first electrode; one or more organic compound layers; and a second electrode, wherein the first electrode includes a conductive layer and an n-type organic compound layer disposed on the conductive layer, a difference in energy between the LUMO energy level of the n-type organic compound layer of the first electrode and a Fermi energy level of the conductive layer of the first electrode is 4 eV or less, one of the organic compound layers interposed between the n-type organic compound layer of the first electrode and the second electrode is a p-type organic compound layer forming an NP junction along with the n-type organic compound layer of the first electrode, a difference in energy between the LUMO energy level of the n-type organic compound layer of the first electrode and the HOMO energy level of the p-type organic compound layer is 1 eV or less, and one or more layers interposed between the conductive layer of the first electrode and the second electrode are n-doped or p-doped with an organic material or an inorganic material.