Patent ID: 8093491

Claim:
A solar cell contact comprising, prior to firing: A silicon semiconductor wafer; A composition deposited on the silicon semiconductor wafer, the composition comprising: a. A solids portion and b. An organics portion, c. Wherein the solids portion comprises i. From about 85 to about 99 wt % of a conductive metal component silver, and ii. From about 1 to about 15 wt % of a glass component, wherein the glass component is lead-free and cadmium-free, the glass component including from 50 to 80 mol % Bi 2 O 3 , from 15 to 35 mol % SiO 2 , from 1 to 15 mol % ZnO and from 1 to 15 mol % V 2 O 5 ; wherein the glass component includes a second-phase crystalline material selected from the group consisting of alumino-silicates, bismuth borates, bismuth silicates, bismuth titanates, vanadates, bismuth vanadates, bismuth vanadium titanates, zinc borates, zinc titanates, zinc silicates, zirconium silicates, and reactions products thereof and combinations thereof.