Organic el device and organic el panel

An organic electroluminescent device comprising an organic electroluminescent light-emitting part including an organic light-emitting layer, between a metal electrode and a transparent electrode, the organic electroluminescent device comprising:

• a transparent electrically conductive film on a surface of the metal electrode, on the organic electroluminescent light-emitting part side thereof;
• wherein a thickness of the transparent electrically conductive film is set so as to satisfy the following equation, where L is the optical distance from the organic light-emitting layer to the metal electrode, and λ is the wavelength of light emitted by the organic light-emitting layer:
• L=(2n+1)λ/4 (n=0, 1, 2, . . . ).

An organic electroluminescent device comprising an organic electroluminescent light-emitting part including an organic light-emitting layer, between a metal electrode and a transparent electrode, the organic electroluminescent device comprising:

• a transparent electrically conductive film is provided on a surface of the metal electrode, on the organic electroluminescent light-emitting part side thereof;
• wherein
• light of wavelengths different than the wavelength of light emitted by the organic light-emitting layer is absorbed by at least one, or both, of the metal electrode and the transparent electrically conductive film, and only light of the wavelength emitted by the organic electroluminescent light-emitting layer is discharged from the transparent electrode.