# US 12,193,251 B2 · Quantum dot composition, method of manufacturing display device including the same, and display device manufactured by the display device manufacturing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,251 B2 - Document ID: US12193251B2 - Status: Granted - Kind: B2 - Application number: 17/741,373 - Filed: 2022-05-10 - Published: 2023-02-16 - Granted: 2025-01-07 - Earliest claimed: 2021-08-12 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd - Inventors: Soodong Kim; Woo-Man Ji - Web page: https://patentgrep.com/patent/US12193251B2 ## CPC - H10K 50/115: comprising active inorganic nanostructures, e.g. luminescent quantum dots - H10K 59/877: {comprising scattering means} - G02B 5/201: {in the form of arrays} - G02B 5/206: {comprising particles embedded in a solid matrix} - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 85/10: Organic polymers or oligomers - B82Y 15/00: Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors - B82Y 20/00: Nanooptics, e.g. quantum optics or photonic crystals - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - H10K 59/12: Active-matrix OLED [AMOLED] displays - H10K 59/8792: {comprising light absorbing layers, e.g. black layers} - H10K 2102/00: Constructional details relating to the organic devices covered by this subclass - H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES ## Abstract A quantum dot composition includes a scatterer containing an inorganic material, a quantum dot containing a core and a shell surrounding the core, a ligand binding to the quantum dot, a polymer resin in which the quantum dot and the scatterer are dispersed, and a dispersant containing at least one of an acidic substituent or a basic substituent. At least one of the polymer resin or the dispersant includes a same material as the shell and the ligand binds to the polymer resin or dispersant that includes the same material as a shell. ## Claims ### Claim 1 A quantum dot composition comprising: a scatterer that includes an inorganic material; a quantum dot that includes a core and a shell surrounding the core; a ligand binding to the quantum dot; a polymer resin in which the quantum dot and the scatterer are dispersed; and a dispersant that includes at least one of an acidic substituent or a basic substituent, wherein at least one of the polymer resin or the dispersant comprises a same material as the shell. ### Claim 2 (depends on 1) The quantum dot composition of claim 1, wherein the dispersant comprises the same material as the shell; and the ligand is detached from the quantum dot due to at least one of heat or light to bind to the dispersant. ### Claim 3 (depends on 1) The quantum dot composition of claim 1, wherein the polymer resin comprises the same material as the shell; and the ligand is detached from the quantum dot due to at least one of heat or light to bind to the polymer resin. ### Claim 4 (depends on 1) The quantum dot composition of claim 1, further comprising an inorganic particle that includes the same material as the shell and dispersed in the polymer resin, wherein the ligand is detached from the quantum dot due to at least one of heat or light to bind to the inorganic particle. ### Claim 5 (depends on 4) The quantum dot composition of claim 4, further comprising a sub dispersant configured to disperse the inorganic particle. ### Claim 6 (depends on 1) The quantum dot composition of claim 1, wherein the polymer resin comprises an acrylate-based compound, a diacrylate-based compound, or a methacrylate-based compound. ### Claim 7 (depends on 1) The quantum dot composition of claim 1, wherein the polymer resin has a vapor pressure of 10−3 mmHg or less. ### Claim 8 (depends on 1) The quantum dot composition of claim 1, wherein the shell comprises at least one of SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, or AlSb. ### Claim 9 A display device manufacturing method comprising forming a light control layer, the forming of the light control layer including: forming a plurality of partition walls spaced apart from each other; and forming a light control part by providing a quantum dot composition between the partition walls, wherein the quantum dot composition includes: a scatterer that includes an inorganic material, a quantum dot that includes a core and a shell surrounding the core, a ligand binding to the quantum dot, a polymer resin in which the quantum dot and the scatterer are dispersed, and a dispersant that includes at least one of an acidic substituent or a basic substituent, wherein at least one of the polymer resin, the dispersant, or the partition walls comprises a same material as the shell. ### Claim 10 (depends on 9) The method of claim 9, wherein the forming of the light control part comprises supplying at least one of heat or light to the quantum dot composition; and the ligand is detached from the quantum dot due to at least one of the heat or the light to bind to at least one of the polymer resin, the dispersant, or the partition walls. ### Claim 11 (depends on 9) The method of claim 9, further comprising, before the forming of the light control part, forming a cover layer that comprises the same material as the shell and covers side surfaces of the partition walls. ### Claim 12 (depends on 9) The method of claim 9, further comprising, before or after the forming of the light control layer, forming a coating layer that comprises the same material as the shell and is disposed on one surface of the light control layer. ### Claim 13 (depends on 12) The method of claim 12, further comprising, before the forming of the coating layer, polishing the one surface of the light control layer. ### Claim 14 A display device comprising: a display element layer; a color filter layer disposed on the display element layer; and a light control layer disposed between the display element layer and the color filter layer, the light control layer including: a plurality of partition walls spaced apart from each other, and a light control part disposed between the partition walls, the light control part including: a quantum dot containing a core and a shell surrounding the core, a scatterer containing an inorganic material, a polymer resin in which the quantum dot and the scatterer are dispersed, a dispersant containing at least one of an acidic substituent or a basic substituent, and a plurality of ligands binding to the surface of the shell or detached from the surface of the shell, wherein at least one of the polymer resin, the dispersant, or the partition walls comprises a same material as the shell, and at least one of the ligands binds to the polymer resin, dispersant, or partition walls including the same material as the shell. ### Claim 15 (depends on 14) The display device of claim 14, wherein the light control part further comprises an inorganic particle that includes the same material as the shell and dispersed in the polymer resin; and at least one of the ligands binds to the inorganic particle. ### Claim 16 (depends on 14) The display device of claim 14, wherein the light control layer further comprises a cover layer that includes the same material as the shell and covers side surfaces of the partition walls adjacent to the light control parts; and at least one of the ligands binds to the cover layer. ### Claim 17 (depends on 16) The display device of claim 16, wherein the light control layer further comprises a sub cover layer that includes the same material as the shell and covers one surface of the light control parts adjacent to the display element layer; and at least one of the ligands binds to the sub cover layer. ### Claim 18 (depends on 17) The display device of claim 17, wherein the sub cover layer does not overlap the partition walls. ### Claim 19 (depends on 14) The display device of claim 14, further comprising a coating layer that includes the same material as the shell and is disposed on an upper surface or a lower surface of the light control layer, wherein at least one of the ligands binds to the coating layer. ### Claim 20 (depends on 14) The display device of claim 14, wherein the partition walls comprise an inorganic particle formed of the same material as the shell, or the partition walls comprise a compound formed of the same material as the shell; and at least one of the ligands binds to the inorganic particle or the compound.