| abstract |
cathode; anode; And an electron transport layer formed between the cathode and the anode, wherein the electron injection layer is formed between the cathode and the electron transport layer, and an aryl phosphine oxide-based electron injection layer material represented by Chemical Formula 1 An organic electroluminescent device having an electron injection layer comprising:n n n [Formula 1]n n n n n n n n Here, Ar 1 , Ar 2 , and Ar 3 may be the same or different, a substituted or unsubstituted aryl group of C6 to C18 or a substituted or unsubstituted heterocyclic group of C6 to C18, and Y is oxygen, sulfur Or selenium. The organic EL device of the present invention having an electron injection layer formed by using an arylphosphine oxide compound represented by Formula 1 has a conventional electron injection layer such as LiF having luminous efficiency, current density, brightness, and driving voltage characteristics. Compared with organic electroluminescent element, it improves significantly. |