Organic electroluminescent device and panel therewith

摘要

A blue organic EL device with an improved EL luminescence efficiency where an energy barrier is reduced during injection of holes or electrons from an anode or cathode to facilitate charge injection; a charge transporting layer acts as a blocking layer preventing holes or electrons from passing through a luminescent layer; and a recombination of holes and electrons is effectively performed. An organic electroluminescent device have at least two organic-compound layers selected from the group consisting of a luminescent layer emitting a blue light, an electron injection layer and an electron transporting layer between heteropolar electrodes, wherein the electron injection or electron transporting layer has an ionization potential higher than that of the luminescent layer.