Conductive pastes for solar cells

• Main Authors: SUTTON, PATRICIA ANN, CELA, BEATRIZ, BOOTH, JONATHAN, KATZBACH, ROLAND, ARAPOV, KIRILL, JOHNSON, SIMON
• Format: Patent
• Language: Chinese; English
• Published: 01.12.2021
• Subjects: ADHESIVES; BASIC ELECTRIC ELEMENTS; CABLES; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; CONDUCTORS; CORRECTING FLUIDS; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FILLING PASTES; GLASS; INKS; INSULATORS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SEMICONDUCTOR DEVICES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; USE OF MATERIALS THEREFOR; WOODSTAINS

A conductive paste comprising: a solids portion comprising a silver powder and a crystalline metal compound powder; and an organic carrier medium in which the silver powder and crystalline metal compound powder are dispersed, wherein the solids portion has a glass content less than 1 wt%, wherein the crystalline metal compound powder has a lead content less than 0.5 wt% calculated as PbO; wherein the crystalline metal compound powder has a particle size with a D90 ≤ 5 [mu]m and a D50 ≤ 2 [mu]m, and wherein the crystalline metal compound powder has a composition comprising at least: 40 to 60 wt% Te calculated as TeO2; 12 to 25 wt% Bi calculated as Bi2O3; and 10 to 25 wt% Zn calculated as ZnO, expressed as percentage weights (wt%) relative to a total weight of the crystalline metal compound powder in the conductive paste excluding any silver compounds, and/or wherein the crystalline metal compound powder has a composition comprising at least: 20 to 40 mol% Te calculated as TeO2; 2 to 6 mol% Bi calculated as Bi2