ORGANIC ELECTROLUMINESCENCE ELEMENT AND METHOD OF MANUFACTURING THEREOF

摘要

Provided is an organic electroluminescence element that has adopted a hole injection layer with which a favorable hole-conducting efficiency can be achieved. The organic electroluminescence element is provided with: a functional layer (6) composed of 1 or more layers, arranged between an anode (2) and a cathode (8), and comprises a light-emitting layer (6B) constituted by using an organic material; a hole injection layer (4) arranged between the anode (2) and the functional layer (6); and banks (5) that prescribe the light-emitting layer (6B). The hole injection layer (4) contains tungsten oxide therein, and the tungsten element constituting the tungsten oxide is contained in the hole injection layer (4) in hexavalent state, or in a state having ionic valence lower than the hexavalent state, and the hole injection layer (4) also contains therein tungsten oxide crystals the particle diameter of which is in the order of nanometers. The hole injection layer (4) is formed to have, in a section prescribed by the banks (5), a reentrant structure wherein a portion of the surface of the functional layer (6) side thereof is positioned more to the anode (2) side than the other portions, and the inner faces of the recess section in this reentrant structure are in contact with the functional layer (6).