| 摘要 |
An organic EL device wherein a transparent conductive film of one of In2O3-ZnO, In2O3-SnO2, ZnO, and SnO2 is provided on the light-emitting layer side of a metal electrode of the organic EL device, the thickness of the transparent conductive film is so determined as to satisfy the formula below where L is the optical distance between an organic light-emitting layer and the metal electrode, and g is the wavelength of the emitted light and the light waves reflected from the metal electrode interfere with one another to strengthen one another. The external quantum efficiency is improved without degrading the luminance, and the contrast can be improved. An organic EL panel using the organic EL device is also disclosed. L=(2n+1) g /4(n=0, 1, 1,...). |
