Heraeus Precious Metals North America Conshohocken LLC

Other

Cuiwen Guo

Lei Wang

Weiming Zhang

Li Yan

Raymond Michael Cosimano

Lixin Song

Chilong Chen

Brenton Yancey

The invention provides an electroconductive paste comprising metallic particles, an inorganic reaction system, and an organic vehicle. The inorganic reaction system includes a lead-tellurium-magnesium composition of Formula (II): Pb&#x2014;Te&#x2014;(Mg&#x2014;Ca&#x2014;Sr&#x2014;Ba)-M-Oe, wherein 0&#x3c;a, b, or d&#x2264;1, 0&#x2264;w, x, y, z&#x2264;1, w+x+y+z=c, at least one of w, x, y and z is greater than zero, the sum of a, b, c and d is 1, 0&#x3c;c&#x2264;0.2, 0&#x2264;d&#x2264;0.5, a:b is between about 10:90 and about 90:10, (a+c+d):b is between about 10:90 and about 90:10, M is one or more elements, and e is a number sufficient to balance the Pb, Te, Mg&#x2014;Ca&#x2014;Sr&#x2014;Ba and M components.

Lead-tellurium inorganic reaction systems

An organic vehicle used in the manufacture of electroconductive silver paste. The organic vehicle comprises an organic binder, a surfactant, and an organic solvent. The preferred embodiment of the invention utilizes at least one of PVP, PMMA, or PVB as the organic binder, allowing for high compatibility with the metallic particles and resulting in an electroconductive paste with low viscosity for fine line printability. Another aspect of the invention relates to an electroconductive paste composition. The preferred embodiment utilizes metallic particles, glass frit, and an organic vehicle comprising a binder, namely at least one of PVP, PMMA, or PVB, a surfactant, and an organic solvent.

Organic vehicle for electroconductive paste

An inorganic reaction system comprising a lead-bismuth-tellurium-silicate composition of Formula (I): Pb&#x2014;Bi&#x2014;Te&#x2014;Si-M-O, wherein 0&#x3c;a, b, c, d, or g&#x2264;1, 0&#x2264;d, e&#x2264;1, and the sum of a, b, c, d and g is 1, 0&#x3c;a&#x2264;0.05, 0.2&#x3c;b&#x2264;0.95, 0&#x3c;c&#x2264;0.5, 0&#x3c;d&#x2264;0.2, 0&#x3c;g&#x2264;0.5, a:b is between about 0.1:99.9 to about 5:95, b:c is between about 50:50 to 99:1, a:c is between about 1:99 to about 10:90, b:g is between about 50:50 to about 98:2, M is one or more elements, and e is a number sufficient to balance the Pb, Bi, Te, Si, and M components.

Lead-bismuth-tellurium-silicate inorganic reaction system having improved adhesion properties

The invention provides an inorganic reaction system for the preparation of electroconductive paste. Particularly, an inorganic reaction system comprises conductive glass. The inorganic reaction system may comprise a silver containing matrix forming composition. The silver containing matrix composition may comprise at least one of silver oxide or silver halide, or both. The invention also provides solar cells manufactured utilizing an electroconductive paste comprising an inorganic reaction system comprising conductive glass, and methods of manufacturing solar cells utilizing an electroconductive paste comprising an inorganic reaction system comprising conductive glass.

Inorganic reaction system for electroconductive paste composition

The invention relates to an inorganic reaction system used in the manufacture of electroconductive pastes. The inorganic reaction system comprises a lead containing composition and elemental tellurium, where in the lead containing composition is between 5-95 wt. % of the inorganic reaction system, and the elemental tellurium is between 5-95 wt. % of the inorganic reaction system. More preferably, the lead containing composition is between 40-90 wt. % of the inorganic reaction system, and the elemental tellurium is between 10-40 wt. % of the inorganic reaction system. The lead containing composition can be a glass frit and can further comprise lead oxide. Another aspect of the invention relates to an electroconductive paste composition that comprises metallic particles, an inorganic reaction system as disclosed, and an organic vehicle. Another aspect of the invention relates to an organic vehicle that comprises a binder, a surfactant, a solvent, and a thixatropic agent. Another aspect of the invention relates to a solar cell printed with an electroconductive paste composition as disclosed, as well as an assembled solar cell module. Another aspect of the invention relates to a method of producing a solar cell.

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Horsham, PA, United States of America

Cuiwen Guo