ORGANIC ELECTROLUMINESCENCE DEVICE

摘要

An organic EL device having a good durability against pulse drive and an excellent heat resistance and comprising a luminescent layer and a hole injection layer between the anode and cathode, wherein the hole injection layer is made of an oligomer which has a phenylenediamine structure and the glass transition temperature of which is 110 DEG C or more, and an intermediate layer is provided between the hole injection layer and the anode to suppress chemical reactions at the interface between the anode and the hole injection layer. Hence the heat resistance of the device is greatly improved, an excellent durability against severe driving conditions is ensured, and the life is long.