NOVELTY - Glass (A1) comprises (wt.%): silica (SiO2) (73-76), sodium oxide (Na2O) (10-20), calcium oxide (CaO) (5-15), magnesium oxide (MgO) (0-3), potassium oxide (K2O) (0-2), total iron (expressed as ferric oxide (Fe2O3)) (0.01-0.03), iron oxide (FeO) (0-0.0015), cerium oxide (0-0.07), antimony oxide (0.1-0.4), and sulfur trioxide (SO3) (0.1-0.6). The total alkali content (Na2O+CaO+MgO+K2O) of the glass is not greater than 24.35%. The glass has a density of not greater than 2.495 g/cm3, the glass has a glass redox of not greater than 0.12, and total solar transmission (ISO 9090 1.5 AM) of at least 90%.    USE - As a glass used in photovoltaic devices (claimed) such as solar cells.    ADVANTAGE - The glass has density of not greater than 2.495 (preferably not greater than 2.490, especially not greater than 2.485) g/cm3; glass redox of not greater than 0.12 (preferably not greater than 0.08); total solar transmission (ISO 9090 1.5 AM) of at least 90%; and total solar transmission of at least 91.5%. The glass is free of each of erbium oxide, nickel oxide, cerium oxide, cobalt oxide, zirconium oxide, zinc oxide, neodymium oxide, chromium oxide and selenium. The glass has positive (basterisk) color value; and has transmissive (aasterisk) color value of -1 to 1 (preferably -0.5 to 0.5), and a transmissive (basterisk) color value of 0 to 1.5 (preferably 0.1 to 1). In the photovoltaic device, at least one surface of the patterned glass substrate is patterned so as to have surface roughness of 0.5-1.5 mu m.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) photovoltaic device comprising: patterned glass substrate, where at least one surface of the patterned glass substrate has an average surface roughness of 0.1-1.5 mu m; and first and second conductive layers with at least a photoelectric film provided between them, where the glass substrate is the glass (A1), where the glass substrate has transmissive (aasterisk) color value of -1 to 1 and transmissive (basterisk) color value of 0 to 1.5; and    (2) making patterned glass involving providing a molten glass batch in a furnace or melter comprising SiO2 (73-76%), total iron (0.01-0.03%), and antimony oxide; causing batch redox of 12-52 to occur in the furnace or melter with respect to the glass batch; forwarding a glass ribbon from the furnace or melter to a nip between first and second rollers, at least one of the rollers having patter defined in its surface, where the glass ribbon reaches the nip at a temperature of 1900-2400 degrees F; at the nip, transferring the pattern from the roller(s) to the glass ribbon; the glass ribbon being at a temperature of 1100-1600 degrees F upon exiting the nip; annealing the glass ribbon at least after the ribbon exits the nip, thus providing a patterned glass having a total solar transmission of at least 91%, total iron (0.01-0.03%), and antimony oxide (0.1 to 0.4%).