Electrode laminate and organic light emitting device element

An organic light emitting device comprising:

• a substrate;
• a first electrode provided on the substrate;
• a second electrode provided opposite to the first electrode;
• an organic material layer provided between the first electrode and the second electrode, wherein the first electrode is provided between the substrate and the organic material layer;
• an auxiliary electrode of the first electrode;
• and
• an internal light extraction layer between the first electrode and the substrate,
• wherein the auxiliary electrode of the first electrode has a laminated structure of a first layer having reflectivity of 80% or greater at a wavelength of 550 nm and a second layer having a higher etching rate compared to the first layer,
• wherein the auxiliary electrode of the first electrode is provided so that a part, not the whole, of the lateral surface of the first layer of the auxiliary electrode contacts the lateral surface of the first electrode, and the first layer of the auxiliary electrode contacts the lateral surface of the first electrode without contacting any other parts of the first electrode,
• wherein a lower surface line width (b) of the second layer is smaller than an upper surface line width (a′) of the first layer,
• wherein the lower surface line width (b) of the second layer is a line width of a surface which meets an upper surface of the first layer,
• wherein the organic material layer is vertically on the second layer of the auxiliary electrode, and,
• wherein the first electrode is a transparent electrode.