# US 10,319,936 B2 · Light-emitting device, method of manufacturing light-emitting device, and light-emitting system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,319,936 B2 - Document ID: US10319936B2 - Status: Granted - Kind: B2 - Application number: 15/686,771 - Filed: 2017-08-25 - Published: 2017-12-28 - Granted: 2019-06-11 - Earliest claimed: 2015-02-25 - Assignees: Pioneer Corporation; Tohoku Pioneer Corporation - Applicants: Pioneer Corporation; Tohoku Pioneer Corporation - Inventors: Masaki Takahashi; Hiroki Tan; Noriaki Waki - Web page: https://patentgrep.com/patent/US10319936B2 ## CPC - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 59/221: {Static displays, e.g. displaying permanent logos} - H10K 59/80521: {characterised by their shape} - H10K 59/877: {comprising scattering means} - H10K 71/211: {by selective transformation of an existing layer} - H10K 77/111: {Flexible substrates} - H10K 2102/3035: {Edge emission} - H10K 2102/311: {Flexible OLED} - H10K 2102/341: {Short-circuit prevention} - Y02E 10/549: Organic PV cells - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A substrate (100) has optical transparency, and a light-emitting unit (140) is formed on the substrate (100). The light-emitting unit (140) includes a first electrode (110), an organic layer (120), and a second electrode (130). The organic layer (120) is located between the first electrode (110) and the second electrode (130). The second electrode (130) extends outside the light-emitting unit (140). At least an end of a portion of the second electrode (130) which is located outside the light-emitting unit (140) is oxidized. ## Claims ### Claim 1 A light-emitting device comprising: a light-transmitting substrate; and a light-emitting unit on a first surface of the substrate, wherein the light-emitting unit includes a first electrode, a second electrode that is reflective, and an organic layer between the first electrode and the second electrode wherein the organic layer is in direct contact with the first electrode and the second electrode, and at least an end portion of the second electrode that is located outside the light-emitting unit is oxidized and is in direct contact with the organic layer. ### Claim 2 (depends on 1) The light-emitting device according to claim 1, wherein a film thickness of the end portion is smaller than a film thickness of the portion of the second electrode other than the end portion. ### Claim 3 (depends on 1) The light-emitting device according to any claim 1, further comprising an insulating layer that covers an edge of the first electrode, wherein the end portion is located over the insulating layer. ### Claim 4 (depends on 1) The light-emitting device according to claim 1, further comprising a light-transmitting region next to the light-emitting unit, wherein the light-transmitting region transmits visible light. ### Claim 5 (depends on 4) The light-emitting device according to claim 4, further comprising a plurality of the light-emitting units, wherein the light-transmitting region is between the plurality of light-emitting units. ### Claim 6 (depends on 1) The light-emitting device according to claim 1, wherein the second electrode contains aluminum. ### Claim 7 (depends on 1) The light-emitting device according to claim 1, further comprising a light diffusion layer on a second surface of the substrate, wherein the light diffusion layer overlaps at least the end portion of the second electrode. ### Claim 8 (depends on 1) The light-emitting device according to claim 1, wherein the end portion includes an oxidized portion, and an end of the oxidized portion toward the center of the second electrode is located outside the light-emitting unit. ### Claim 9 (depends on 3) The light-emitting device according to claim 3, wherein the end portion includes an oxidized portion, and an end of the oxidized portion toward the center of the second electrode is located over the insulating layer. ### Claim 10 (depends on 1) The light-emitting device according to claim 1, wherein the end portion includes an oxidized portion in a thickness direction, and a lower surface of the oxidized portion is not in contact with the organic layer. ### Claim 11 (depends on 1) The light-emitting device according to claim 1, wherein the end portion includes an oxidized portion, and the oxidized portion is oxidized in its entire thickness in a direction perpendicular to the substrate. ### Claim 12 (depends on 1) The light-emitting device according to claim 1, wherein the end portion of the second electrode that is oxidized has a higher visible light transmittance than a visible light transmittance of a portion of the second electrode other than the end portion. ### Claim 13 A light-emitting device comprising: a light-transmitting substrate; and a light-emitting unit on a first surface of the substrate, wherein the light-emitting unit includes a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode wherein the organic layer is in direct contact with the first electrode and the second electrode, and the second electrode extends outside the light-emitting unit into a light-transmitting region, at least an end portion of the second electrode located inside the light-transmitting region being oxidized and in direct contact with the organic layer, wherein the end portion has a higher visible light transmittance than another portion of the second electrode. ### Claim 14 A light-emitting device comprising: a light-transmitting substrate; and a light-emitting unit on a first surface of the substrate, wherein the light-emitting unit includes a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode wherein the organic layer is in direct contact with the first electrode and the second electrode, further comprising a light-transmitting region located next to the light-emitting unit, the light-transmitting region transmitting visible light, wherein the second electrode is in direct contact with the organic layer and extends outside the light-emitting unit into the light-transmitting region, at least an end portion of the second electrode located outside the light-emitting unit being oxidized, and a portion of the organic layer is formed in the light-transmitting region and transmits visible light. ### Claim 15 A method of manufacturing a light-emitting device, comprising: forming a first electrode over a light-transmitting substrate; forming an insulating layer that covers an edge of the first electrode and defines a light-emitting unit; forming an organic layer over the first electrode such that the organic layer is in direct contact with the first electrode; forming a second electrode over the organic layer such that the second electrode is in direct contact with the organic layer; and oxidizing an end portion of the second electrode located outside the light-emitting unit such that the end portion of the second electrode is in direct contact with the organic layer. ### Claim 16 (depends on 15) The method of manufacturing a light-emitting device according to claim 15, wherein the oxidizing the end portion comprises irradiating the end portion with a laser beam. ### Claim 17 (depends on 16) The method of manufacturing a light-emitting device according to claim 16, wherein the oxidizing the end portion comprises exposing the end portion to an oxidizing atmosphere. ### Claim 18 (depends on 17) The method of manufacturing a light-emitting device according to claim 17, wherein the oxidizing atmosphere contains at least one of N2O, H2O2, O2 and O3. ### Claim 19 A light-emitting system comprising: a light-transmitting partition member that partitions a space from an exterior thereof; a light-transmitting substrate on a surface of the partition member at the space; and a light-emitting unit on the substrate, wherein the light-emitting unit includes a first electrode, a second electrode that is reflective, and an organic layer between the first electrode and the second electrode wherein the organic layer is in direct contact with the first electrode and the second electrode, and at least an end portion of the second electrode located outside the light-emitting unit is oxidized and is in direct contact with the organic layer. ### Claim 20 A light emitting device comprising: a plurality of light-emitting units, each including a first electrode, an organic layer, and a second electrode having light-shielding properties, which are laminated over a first surface of a substrate, wherein the organic layer is in direct contact with the first electrode and the second electrode, and a light-transmitting region that transmits visible light, wherein an end portion of the second electrode located outside the light-emitting unit in direct contact with the organic layer includes an oxidized portion thickness direction at least at an end of the second electrode, and the light-transmitting region includes the oxidized portion and is provided between oxidized portions next to each other.