Patent ID: 9490445
Filing Date: 2016-11-08
CPC Classification: H01L,H05B

Claim Text:
1. An organic EL element, comprising: an anode; a cathode; a functional layer, containing an organic material, between the anode and the cathode; and a hole injection layer, for injecting holes to the functional layer, between the anode and the functional layer, wherein the hole injection layer is a metal oxide film composed of only a metal oxide, metal atoms constituting the metal oxide include both metal atoms at a maximum valence thereof and metal atoms at a valence less than the maximum valence, the metal oxide film includes crystals of the metal oxide, a particle diameter of the crystals being on an order of nanometers, grain boundaries of the crystals of the metal oxide are continuously connected between two surfaces of the metal oxide film in at least one location in a thickness direction of the metal oxide film, and the metal oxide is tungsten oxide, so that the metal oxide film is a tungsten oxide film.