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

摘要

To increase light-extraction efficiency and simplify manufacturing process. An organic EL panel includes: first electrode reflecting incident light; second electrode transmitting incident light therethrough; organic light-emitting layer emitting light of corresponding color among RGB colors; first functional layer including charge injection/transport layer and at least one other layer, and disposed between the first electrode and the light-emitting layer; and second functional layer disposed between the second electrode and the light-emitting layer. The first functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the first electrode, the second functional layers of the RGB colors are equal in film thickness, the organic light-emitting layers of the RGB colors are equal in optical distance from the second electrode, and the organic light-emitting layers of the RGB colors differ in film thickness.

主权项

1. An organic electro luminescence (EL) panel, comprising:
a first electrode of each of red (R), green (G), and blue (B) colors that reflects incident light; a second electrode that faces the first electrode of each of the R, G, and B colors, and transmits incident light therethrough; an organic light-emitting layer of each of the R, G, and B colors that is disposed between the first electrode of a corresponding color and the second electrode, and emits light of a corresponding color due to voltage application between the first electrode of the corresponding color and the second electrode; a first functional layer of each of the R, G, and B colors that is disposed between the first electrode of a corresponding color and the organic light-emitting layer of a corresponding color; a second functional layer of each of the R, G, and B colors that is disposed between the second electrode and the organic light-emitting layer of a corresponding color; and a color filter of each of the R, G, and B colors for chromaticity correction that is disposed opposite the organic light-emitting layer of a 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 a corresponding color travels through the first functional layer of a corresponding color towards the first electrode of a corresponding color, strikes and is reflected by the first electrode of the corresponding color, and then is emitted externally after passing through the first functional layer of the corresponding color, the organic light-emitting layer of the corresponding color, the second functional layer of a corresponding color, the second electrode, and the color filter of a corresponding color, a second portion of the light of each of the R, G, and B colors travels through the second functional layer of the corresponding color towards the second electrode instead of towards the first electrode of the corresponding color, and is emitted externally after passing through the second electrode and the color filter of the corresponding color, the respective first functional layers of the R, G, and B colors are equal in film thickness to one another, the respective organic light-emitting layers of the R, G, and B colors are equal to one another in optical distance from the first electrode of the corresponding color, the respective second functional layers of the R, G, and B colors are equal in film thickness to one another, the respective organic light-emitting layers of the R, G, and B colors are equal to one another in optical distance from the second electrode, the respective organic light-emitting layers of the R, G, and B colors differ in film thickness from one another, and the film thickness of the organic light-emitting layer of the B color is not close to a film thickness at which maximum light-extraction efficiency occurs when the color filter of the B color is not provided, and is close to a film thickness at which maximum light-extraction efficiency occurs when the color filter of the B color is provided.