Organic EL panel, display device using same, and method for producing organic EL panel

摘要

An organic EL panel includes reflective electrodes, a transparent electrode, organic light-emitting layers, and functional layers that are each provided between a corresponding one of the reflective electrodes and a corresponding one of the respective organic light-emitting layers. The film thicknesses of the respective functional layers of R, G, and B colors are each 60 nm or less such that a local maximum of light-emitting efficiency for a corresponding color is exhibited, and are substantially equal to each other. The optical distances between the respective organic light-emitting layers of the R, G, and B colors and the respective reflective electrodes are each 100 nm or less, and are substantially equal to each other.

主权项

1. An organic electro luminescence (EL) panel, comprising:
first electrodes that reflect incident light; a second electrode that faces the first electrodes, and transmits incident light therethrough; an organic light-emitting layer of each of red (R), green (G), and blue (B) colors that is disposed between a corresponding one of the first electrodes and the second electrode, and emits light of a corresponding color due to voltage application between the corresponding first electrode and the second electrode; a functional layer of each of the R, G, and B colors that is composed of one or more layers, and is disposed between a corresponding one of the first electrodes and the organic light-emitting layer of the corresponding color; and a color filter of each of the R, G, and B colors that is disposed above the organic light-emitting layer of the corresponding color, with the second electrode being interposed therebetween, wherein a first portion of light of each of the R, G, and B colors emitted from the organic light-emitting layer of the corresponding color travels through the second electrode instead of towards the corresponding first electrode, and is emitted externally after passing through the second electrode and the color filter of the corresponding color, a second portion of the light of each of the R, G, and B colors travels through the functional layer of the corresponding color towards the corresponding first electrode, strikes and is reflected by the corresponding first electrode, and is emitted externally after passing through the functional layer of the corresponding color, the organic light-emitting layer of the corresponding color, the second electrode, and the color filter of the corresponding color, the respective functional layers of the R, G, and B colors each have a different film thickness of 60 nm or less that falls within substantially a same range, the film thickness of each of the respective functional layers of the R, G, and B colors corresponds to a local maximum of light-emitting efficiency with respect to the light of the corresponding color emitted externally through the color filter of the corresponding color, respective optical distances between the respective organic light-emitting layers of the R, G, and B colors and the respective first electrodes are each 100 nm or less and are different within substantially a same range, and with respect to at least the B color, a film thickness of the functional layer is within a first optimal film thickness range that corresponds to a local maximum of light-emitting efficiency with respect to the light emitted externally from the color filter, the first optimal film thickness range being different than a second optimal film thickness range which corresponds to a local maximum of light-emitting efficiency with respect to the light emitted internally to the color filter.