Patent ID: 8253126

Claim:
An electronic device, comprising: a first electrode to inject or extract holes, the first electrode including a conductive layer and an n-type organic compound layer disposed on the conductive layer; a second electrode to inject or extract electrons; and a p-type organic compound layer that is interposed between the n-type organic compound layer of the first electrode and the second electrode and forms an NP junction together with the n-type organic compound layer of the first electrode, wherein energy levels of the layers satisfy the following Expressions (1) and (2): 2 eV< EnL−EF 1≦4 eV (1) EpH−EnL≦ 1 eV (2) where EF1 is a Fermi energy level of the conductive layer of the first electrode, EnL is an LUMO energy level of the n-type organic compound layer of the first electrode, and EpH is an HOMO energy level of the p-type organic compound layer forming the NP junction together with the n-type organic compound layer of the first electrode, and the conductive layer of the first electrode, and the conductive layer of the first electrode is formed of a material selected from a group consisting of calcium, Ca—Ag; Ca-IZO; and Mg—Ag.