Patent ID: 6262433
Filing Date: 2001-07-17
Classification: H01L

Abstract:
An organic EL device which comprises:a hole injecting electrode, an electron injecting electrode and an organic layer interleaved between these electrodes and including at least a light emitting layer,a high-resistance inorganic electron transporting layer interleaved between said light emitting layer and said electron injecting electrode,said high-resistance inorganic electron transporting layer being capable of blocking holes and having a conductive path for carrying electrons, andan organic electron injecting layer interleaved between said high-resistance inorganic electron transporting layer and said electron injecting electrode, wherein said high-resistance inorganic electron transporting layer comprises as a first component at least one oxide having a work function of 4 eV or lower and selected from the group consisting of oxides of an alkali metal element, an alkaline earth metal element, and a lanthanide element, and as a second component at least one metal or oxide thereof selected from the group consisting of metals and oxides thereof having a work function of 3 to 5 eV.