# US 2013/0153883 A1 · Organic el panel, display device using same, and method for producing organic el panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153883 A1 - Document ID: US20130153883A1 - Status: Published application - Kind: A1 - Application number: 13/819,066 - Filed: 2010-11-24 - Published: 2013-06-20 - Earliest claimed: 2010-11-24 - Assignees: Panasonic Corporation - Inventors: Keiko Kurata; Noriyuki Matsusue; Kazuhiro Yoneda - Web page: https://patentgrep.com/patent/US20130153883A1 ## CPC - H10K 59/35: comprising red-green-blue [RGB] subpixels - H10K 50/131: {with spacer layers between the electroluminescent layers} - H10K 59/876: {comprising a resonant cavity structure, e.g. Bragg reflector pair} - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass - H10K 2102/3026: {Top emission} - H10K 2102/351: {Thickness} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract 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 R, G, and B 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 charge injection/transport layers of R, G, and B colors differ in film thickness, the at least one other layers of R, G, and B colors are equal in film thickness to one another, the second functional layers of R, G, and B colors are equal in film thickness to one another, and the light-emitting layers of R and G colors are equal in film thickness, and differ in film thickness from the light-emitting layer of B color. ## Claims ### Claim at position 1 1-17. (canceled) ### Claim 18 An organic EL panel comprising: a first electrode of each of R (red), G (green), and B (blue) 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 includes a charge injection/transport layer and at least one other layer, and 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 charge injection/transport layers of the R, G, and B colors differ in film thickness from one another, the respective at least one other layers of the R, G, and B colors are equal in film thickness to one another, the respective second functional layers of the R, G, and B colors are equal in film thickness to one another, and the respective organic light-emitting layers of the R and G colors are equal in film thickness to each other, and differ in film thickness from the organic light-emitting layer of the B color. ### Claim 19 (depends on 18) The organic EL panel of claim 18, wherein the film thickness of the organic light-emitting layer of each of the R, G, and B colors is adjusted so as to correspond to a local maximum of light-extraction efficiency with respect to the light of the corresponding color emitted externally after passing through the color filter of the corresponding color. ### Claim 20 (depends on 19) The organic EL panel of Claim 19, wherein a film thickness of the first functional layer of each of the R, G, and B colors is adjusted so as to correspond to a second local maximum of light-extraction efficiency with respect to the light of the corresponding color emitted externally after passing through the color filter of the corresponding color. ### Claim 21 (depends on 18) The organic EL panel of Claim 18, wherein the first functional layer of each of the R, G, and B colors includes, as the at least one other layer, a transparent conductive layer. ### Claim 22 (depends on 18) The organic EL panel of Claim 18, wherein the first functional layer of each of the R, G, and B colors includes a layer formed by a printing method and a layer formed by a physical vapor deposition method, the respective layers of the R, G, and B colors formed by the printing method differ in film thickness from one another, and the respective layers of the R, G, and B colors formed by the physical vapor deposition method are equal in film thickness to one another. ### Claim 23 (depends on 18) The organic EL panel of Claim 18, wherein the first functional layer of each of the R, G, and B colors includes, as the at least one other layer, a transparent conductive layer formed on an anode that is the first electrode of the corresponding color, the first functional layer of each of the R, G, and B colors includes, as the charge injection/transport layer, a hole injection layer formed on the transparent conductive layer and a hole transport layer formed on the hole injection layer, the respective transparent conductive layers of the R, G, and B colors each have a film thickness of 90 nm to 110 nm, the respective hole injection layers of the R, G, and B colors each have a film thickness of 36 nm to 44 nm, the respective hole transport layers of the R, G, and B colors have a film thickness of 54 nm to 66 nm, a film thickness of 36 nm to 44 nm, a film thickness of 9 nm to 11 nm, respectively, and the respective organic light-emitting layers of the R and G colors each have a film thickness of 72 nm to 88 nm, and the organic light-emitting layer of the B color has a film thickness of 54 nm to 66 nm. ### Claim 24 (depends on 23) The organic EL panel of Claim 23, wherein the first electrode of each of the R, G, and B colors is formed from aluminum or alloy of aluminum, and the transparent conductive layer of each of the R, G, and B colors is formed from IZO (Indium Zinc Oxide). ### Claim 25 (depends on 24) The organic EL panel of Claim 24, wherein the respective second functional layers of the R, G, and B colors each have a film thickness of 27 nm to 33 nm. ### Claim 26 (depends on 25) The organic EL panel of Claim 25, wherein the second functional layer of each of the R, G, and B colors includes an electron transport layer having a film thickness of 27 nm to 33 nm. ### Claim 27 (depends on 18) The organic EL panel of claim 18, wherein the first functional layer of each of the R, G, and B colors includes, as the at least one other layer, a transparent conductive layer formed on an anode that is the first electrode of the corresponding color, the first functional layer of each of the R, G, and B colors includes, as the charge injection/transport layer, a hole injection layer formed on the transparent conductive layer and a hole transport layer formed on the hole injection layer, the respective transparent conductive layers of the R, G, and B colors each have a film thickness of 90 nm to 110 nm, the respective hole injection layers of the R, G, and B colors each have a film thickness of 36 nm to 44 nm, the respective hole transport layers of the R, G, and B colors have a film thickness of 45 nm to 55 nm, a film thickness of 27 nm to 33 nm, a film thickness of 9 nm to 11 nm, respectively, and the respective organic light-emitting layers of the R and G colors each have a film thickness of 72 nm to 88 nm, and the organic light-emitting layer of the B color has a film thickness of 36 nm to 44 nm. ### Claim 28 (depends on 27) The organic EL panel of Claim 27, wherein the first electrode of each of the R, G, and B colors is formed from silver or alloy of silver, and the transparent conductive layer of each of the R, G, and B colors is formed from ITO (Indium Tin Oxide). ### Claim 29 (depends on 28) The organic EL panel of Claim 28, wherein the respective second functional layers of the R, G, and B colors each have a film thickness of 27 nm to 33 nm. ### Claim 30 (depends on 29) The organic EL panel of Claim 29, wherein the second functional layer of each of the R, G, and B colors includes an electron transport layer having a film thickness of 27 nm to 33 nm. ### Claim 31 (depends on 18) The organic EL panel of Claim 18, wherein the organic light-emitting layer of each of the R, G, and B colors contains an organic material, and is formed by a printing method. ### Claim 32 (depends on 18) The organic EL panel of Claim 18, wherein the first functional layer of each of the R, G, and B colors includes, as the at least one other layer, a transparent conductive layer formed on an anode that is the first electrode of the corresponding color, the first functional layer of each of the R, G, and B colors includes, as the charge injection/transport layer, a hole injection layer formed on the transparent conductive layer and a hole transport layer formed on the hole injection layer, the transparent conductive layer of each of the R, G, and B colors and the hole injection layer of each of the R, G, and B colors are formed by a physical vapor deposition method, and the hole transport layer of each of the R, G, and B colors is formed by a printing method. ### Claim 33 (depends on 18) A display device with use of the organic EL panel of Claim 18. ### Claim 34 A method of manufacturing an organic EL panel, comprising: a first step of preparing a first electrode of each of R (red), G (green), and B (blue) colors that reflects incident light; a second step of disposing a first functional layer of each of the R, G, and B colors including a charge injection/transport layer and at least one other layer on the first electrode of a corresponding color; a third step of disposing an organic light-emitting layer that emits light of each of the R, G, and B colors on the first functional layer of a corresponding color; a fourth step of disposing a second functional layer of each of the R, G, and B colors on the organic light-emitting layer of a corresponding color; a fifth step of disposing a second electrode that transmits incident light therethrough on the respective second functional layers of the R, G, and B colors so as to face the respective first electrodes of the R, G, and B colors; and a sixth step of disposing a color filter of each of the R, G, and B colors for chromaticity correction so as to be opposite the organic light-emitting layer of a corresponding color with the second electrode being interposed therebetween, wherein in the second step, the first functional layer is disposed such that the respective charge injection/transport layers of the R, G, and B colors differ in film thickness from one another, and the respective at least one other layers of the R, G, and B colors are equal in film thickness to one another, in the third step, the organic light-emitting layer is disposed such that the respective organic light-emitting layers of the R and G colors are equal in film thickness to each other, and differ in film thickness from the organic light-emitting layer of the B color, and in the fourth step, the second functional layer is disposed such that the respective second functional layers of the R, G, and B colors are equal in film thickness to one another.