NOVELTY - A silicon thin film solar cell (10) comprises: glass substrate (12); undercoating (16) on a portion of substrate, and comprises first layer (18) of tin oxide/titania and second layer (20) having compositional (non)uniform mixture of oxides comprising at least two of tin, phosphorus, silicon, titanium, aluminum and zirconium; and conductive coating (22) on a portion of undercoating and containing oxides of at least one of zinc, iron, manganese, aluminum, cerium, tin, antimony, hafnium, zirconium, nickel, bismuth, titanium, cobalt, chromium, silicon, indium or their alloys.    USE - As a silicon thin film solar cell (claimed).    ADVANTAGE - The present solar cell has a specific coating configuration which enhances electron flow through the transparent conductive oxide, while also enhancing the light scattering and transparency characteristics of the solar cell.    DETAILED DESCRIPTION - A silicon thin film solar cell (10) comprises: a glass substrate (12); an undercoating (16) formed over at least a portion of the substrate, and comprises first layer (18) of tin oxide/titania and second layer (20) having a compositional (non)uniform mixture of oxides comprising oxides of at least two of tin, phosphorus, silicon, titanium, aluminum and zirconium; and a conductive coating (22) formed over at least a portion of the undercoating. The conductive coating comprises oxides of at least one of zinc, iron, manganese, aluminum, cerium, tin, antimony, hafnium, zirconium, nickel, bismuth, titanium, cobalt, chromium, silicon, indium or their alloys. The first layer comprises tin oxide or titania having a thickness of 10-25 nm. The second layer comprises (vol.%) silica (30-80), phosphorus oxide (1-15) and titania (5-69), and has tin oxide (1-40 mole.%) or titania (less than 25 mole.%); and has a thickness of 10-120 (preferably 20-40) nm. The conductive coating comprises at least one dopant. An INDEPENDENT CLAIM is included for a coated article, comprising: a substrate; a dielectric layer comprising a mixture of oxides comprising oxides of at least two of tin, phosphorus, silicon, and titanium, where the dielectric layer is a gradient layer; and a conductive coating over the dielectric coating and comprising fluorine doped tin oxide.    DESCRIPTION OF DRAWING(S) - The figure shows a side sectional view of a solar cell.    Solar cell (10)    Substrate (12)    Undercoating (16)    First layer (18)    Second layer (20)    Transparent conductive oxide coating (22)    Amorphous silicon layer (24)    Metal-containing layer (26)