Patent ID: 7700869

Claim:
A photovoltaic device comprising: a patterned glass substrate, wherein at least one surface of the patterned glass substrate has a surface roughness of from about 0.1 to 1.5 μm; first and second conductive layers with at least a photoelectric film provided therebetween; wherein the glass substrate is of a composition comprising: Ingredient wt. % SiO 2 67-75% Na 2 O 10-20% CaO 5-15% total iron (expressed as Fe 2 O 3 ) 0.001 to 0.06% cerium oxide 0 to 0.30% wherein the glass substrate has visible transmission of at least 90%, a transmissive a* color value of −1.0 to +1.0 and a transmissive b* color value of from 0 to +1.5, and wherein colorant portion of said composition consists essentially of 0.001 to 0.06% total iron (expressed as Fe 2 O 3 ) and 0 to 0.30% cerium oxide.