# US 2022/0285658 A1 · Display device and method of manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2022/0285658 A1 - Document ID: US20220285658A1 - Status: Published application - Kind: A1 - Application number: 17/454,775 - Filed: 2021-11-12 - Published: 2022-09-08 - Earliest claimed: 2021-03-04 - Assignees: Samsung Display Co., Ltd.; Ajou University Industry-Academic Cooperation Foundation - Applicants: Samsung Display Co., Ltd.; Ajou University Industry-Academic Cooperation Foundation - Inventors: Dong Seop PARK; Jae Hyun LEE; Sung Ho CHO - Web page: https://patentgrep.com/patent/US20220285658A1 ## CPC - H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers} - H10K 50/81: Anodes - H10K 50/844: Encapsulations - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 71/00: Manufacture or treatment specially adapted for the organic devices covered by this subclass - H10K 71/80: using temporary substrates - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The display device comprises a substrate, a first electrode on the substrate, a pixel defining layer on the first electrode, the pixel defining layer exposing the first electrode, a light emitting layer on the first electrode exposed by the pixel defining layer, a second electrode on the light emitting layer, and an encapsulation layer on the second electrode, the encapsulation layer including a two-dimensional material. A slope of a 2D-peak position to a G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1.7 to 2.7. ## Claims ### Claim 1 A display device comprising: a substrate; a first electrode on the substrate; a pixel defining layer on the first electrode, the pixel defining layer exposing the first electrode; a light emitting layer on the first electrode exposed by the pixel defining layer; a second electrode on the light emitting layer; and an encapsulation layer on the second electrode, the encapsulation layer comprising a two-dimensional material, wherein a slope of a 2D-peak position to a G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1.7 to 2.7. ### Claim 2 (depends on 1) The display device of claim 1, wherein the 2D-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 2650 cm−1 to 2675 cm−1. ### Claim 3 (depends on 2) The display device of claim 2, wherein the G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1575 cm−1 to 1585.5 cm−1. ### Claim 4 (depends on 1) The display device of claim 1, wherein the encapsulation layer comprises a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer that are sequentially stacked, and at least one of the first encapsulation layer or the third encapsulation layer comprises the two-dimensional material. ### Claim 5 (depends on 4) The display device of claim 4, wherein the second encapsulation layer comprises an organic material. ### Claim 6 (depends on 1) The display device of claim 1, wherein the two-dimensional material of the encapsulation layer is graphene. ### Claim 7 (depends on 1) The display device of claim 1, wherein the first electrode comprises a two-dimensional material. ### Claim 8 (depends on 7) The display device of claim 7, wherein the first electrode comprises a first stacked conductive layer, a second stacked conductive layer, and a third stacked conductive layer that are sequentially stacked, and wherein the first stacked conductive layer and the third stacked conductive layer comprise the two-dimensional material of the first electrode. ### Claim 9 (depends on 8) The display device of claim 8, wherein the two-dimensional material of the first electrode is graphene. ### Claim 10 (depends on 1) The display device of claim 1, further comprising a thin film transistor electrically connected to the first electrode, wherein a channel region of the thin film transistor comprises a two-dimensional material. ### Claim 11 (depends on 10) The display device of claim 10, wherein the two-dimensional material of the thin film transistor comprises transition metal dichalogenides (TMDC). ### Claim 12 A display device comprising: a substrate; a first electrode on the substrate, the first electrode comprising a two-dimensional material; a pixel defining layer on the first electrode, the pixel defining layer exposing the first electrode; a light emitting layer on the first electrode exposed by the pixel defining layer; a second electrode on the light emitting layer; and an encapsulation layer on the second electrode, wherein a slope of a 2D-peak position to a G-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 1.7 to 2.7. ### Claim 13 (depends on 12) The display device of claim 12, wherein the first electrode comprises a first stacked conductive layer, a second stacked conductive layer, and a third stacked conductive layer that are sequentially stacked, and wherein the first stacked conductive layer and the third stacked conductive layer comprise the two-dimensional material of the first electrode. ### Claim 14 (depends on 13) The display device of claim 13, wherein the two-dimensional material of the first electrode is graphene. ### Claim 15 (depends on 12) The display device of claim 12, wherein the 2D-peak position of the two-dimensional material measured by Raman spectroscopy is within a range of 2650 cm−1 to 2675 cm−1. ### Claim 16 A method of manufacturing a display device, the method comprising: preparing a two-dimensional material member comprising a multi-layer structure in which each layer comprises a two-dimensional material, a metal layer on the two-dimensional material member, and a thermal release tape on the metal layer; and exfoliating at least one layer of the multi-layer structure of the two-dimensional material member utilizing the thermal release tape. ### Claim 17 (depends on 16) The method of claim 16, wherein a slope of a 2D-peak position to a G-peak position of the two-dimensional material exfoliated from the two-dimensional material member is within a range of 1.7 to 2.7, and wherein the G-peak position and the 2D-peak position are measured by Raman spectroscopy. ### Claim 18 (depends on 16) The method of claim 16, wherein when binding energy between the metal layer and an uppermost layer of the two-dimensional material member is 1 to 1.5 times bonding energy between each layer of the two-dimensional material member, the exfoliating of the at least one layer of the multi-layer structure of the two-dimensional material member comprises exfoliating only the uppermost layer of the two-dimensional material member. ### Claim 19 (depends on 16) The method of claim 16, further comprising exfoliating at least one layer of the two-dimensional material from the two-dimensional material member from which at least a portion of the multi-layer structure is exfoliated. ### Claim 20 (depends on 16) The method of claim 16, wherein the metal layer comprises at least one selected from gold (Au), palladium (Pd), nickel (Ni), and cobalt (Co).