The present invention relates to an organic eletroluminescent element comprising an anode, an organic luminous layer, an electron-injection layer and a cathode, in which the electron-injection layer comprises a metal oxide or a metal halide, and a material different from the metal halide or metal ox...http://www.google.de/patents/US6395409?utm_source=gb-gplus-sharePatent US6395409 - Organic electroluminescent element
