# US 2020/0287166 A1 · Borosilicate light extraction region > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0287166 A1 - Document ID: US20200287166A1 - Status: Published application - Kind: A1 - Application number: 16/295,566 - Filed: 2019-03-07 - Published: 2020-09-10 - Earliest claimed: 2019-03-07 - Assignees: Vitro Flat Glass LLC - Applicants: Vitro Flat Glass LLC - Inventors: Cheng-Hung HUNG - Web page: https://patentgrep.com/patent/US20200287166A1 ## CPC - G02B 5/0268: {characterized by the fabrication or manufacturing method} - C03B 18/12: Making multilayer, coloured or armoured glass (chemical aspects C03C) - C03B 18/20: Composition of the atmosphere above the float bath; Treating or purifying the atmosphere above the float bath - C03C 3/064: containing boron - C03C 17/002: {for flat glass, e.g. float glass} - C03C 17/007: {containing a dispersed phase, e.g. particles, fibres or flakes, in a continuous phase} - G02B 5/0242: {by means of dispersed particles} - H10K 50/854: comprising scattering means - H10K 77/10: Substrates, e.g. flexible substrates - C03C 2217/452: Glass - C03C 2217/477: Titanium oxide - H10K 2102/00: Constructional details relating to the organic devices covered by this subclass - H10K 2102/101: {comprising transparent conductive oxides [TCO]} - H10K 2102/102: {comprising tin oxides, e.g. fluorine-doped SnO2} - H10K 2102/331: {Nanoparticles used in non-emissive layers, e.g. in packaging layer} - H10K 2102/351: {Thickness} - H10K 2102/361: {Temperature} - Y02E 10/549: Organic PV cells - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - C03B: MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES - C03C: CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The invention relates to a light extraction substrate having a light extraction layer. The light extraction layer includes boron, boroate, and/or borosilicate as well as nanoparticles. ## Claims ### Claim 1 A light extraction substrate comprising a glass, the glass comprising a first surface and a second surface; and a light extraction layer over the first surface, wherein the light extraction layer comprises borosilicate and nanoparticles, and wherein the light extraction layer is at least partially embedded into the glass such that at least a portion of the borosilicate and the nanoparticles are integrated into the glass below the first surface. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The light extraction substrate of claim 1 wherein the nanoparticles are formed from a material having a higher refractive index than a refractive index of the glass of the light extraction substrate. ### Claim 4 (depends on 1) The light extraction substrate of claim 1 wherein the light extraction layer has a thickness of at most 2.25 μm. ### Claim 5 (depends on 1) The light extraction substrate of claim 1 further comprising a second light extraction layer on or adjacent the second surface, the second light extraction layer having a surface roughness of 50 nm to 500 nm. ### Claim 6 (depends on 5) The light extraction substrate of claim 5, wherein the surface roughness of the second light extraction layer is at least 150 nm and at most 200 nm. ### Claim 7 (depends on 1) The light extraction substrate of claim 1 further comprising a haze of at least 20%. ### Claim 8 (depends on 1) The light extraction substrate of claim 1 further comprising an anode deposited over the light extraction layer of the glass. ### Claim 9 (depends on 1) The light extraction substrate of claim 1 further comprising an underlayer coating stack deposited over the first surface of the glass. ### Claim 10 An organic light emitting device comprising: a substrate having a first surface and a second surface; a light extraction layer over the first surface of the substrate, wherein the light extraction layer comprises a borosilicate layer; a transparent conductive oxide over the light extraction layer; an emissive layer; and a cathode. ### Claim 11 (depends on 10) The organic light emitting device of claim 10 wherein the light extraction layer further comprises a nanoparticle. ### Claim 12 (depends on 11) The organic light emitting device of claim 11 wherein the nanoparticle is titania. ### Claim 13 (depends on 10) The organic light emitting device of claim 10 wherein the light extraction layer has a thickness of at most 2.25 μm. ### Claim 14 (depends on 10) The organic light emitting device of claim 10 further comprising an external light extraction layer positioned over the second surface of the substrate having an average surface roughness of at least 50 nm. ### Claim 15 (depends on 14) The organic light emitting device of claim 14, wherein the surface roughness of the second light extraction layer is at least 50 nm and at most 500 nm. ### Claim 16 (canceled) ### Claim 17 (depends on 10) The organic light emitting device of claim 10 further comprising an anode deposited over the first surface of the glass. ### Claim 18 (canceled) ### Claim 19 A method of making a light extraction substrate comprising: pouring a glass melt onto a molten metal bath; and applying a boron precursor over the glass melt while the glass melt has a temperature of at least 600° C. ### Claim 20 (canceled) ### Claim 21 (depends on 1) The light extraction substrate of claim 1, wherein the borosilicate is a non-alkali metal borosilicate. ### Claim 22 (depends on 2) The light extraction substrate of claim 2, wherein the nanoparticles comprise alumina, titania, cerium oxide, zinc oxide, tin oxide, silica, zirconia, mixtures thereof, or alloys thereof. ### Claim 23 (depends on 22) The light extraction substrate of claim 22, wherein the nanoparticles comprise titania.