NOVELTY - Solar cell device, comprises: a transparent substrate (202); a composite transparent conductive layer (212) disposed over the transparent substrate, where the composite transparent conductive layer comprises a first transparent conductive layer (206) and a second transparent conductive layer (210) sequentially stacked over the transparent substrate; a photovoltaic element formed over the composite transparent conductive layer; and an electrode layer disposed over the photovoltaic element.    USE - Used as a solar cell device.    ADVANTAGE - The solar device exhibits: efficient light trapping ability; high conductivity; and high resistance to hydrogen plasma.    DETAILED DESCRIPTION - Solar cell device, comprises: a transparent substrate (202); a composite transparent conductive layer (212) disposed over the transparent substrate; a photovoltaic element formed over the composite transparent conductive layer; and an electrode layer disposed over the photovoltaic element. The composite transparent conductive layer comprises a first (206) and second transparent conductive layers (210) sequentially stacked over the transparent substrate, where the first transparent conductive layer is made of lithium and fluorine-codoped tin oxide, and the second transparent conductive layer is made of a material comprising zinc oxide or titanium dioxide. An INDEPENDENT CLAIM is also included for fabricating the solar cell device, comprising: providing the transparent substrate; forming a first transparent conductive layer over the transparent substrate; forming a second transparent conductive layer over the first transparent conductive layer; forming a photovoltaic element over the second transparent conductive layer; and forming an electrode layer disposed over the photovoltaic element.    DESCRIPTION OF DRAWING(S) - The figure shows cross sections showing a method for fabricating the solar cell device.    Transparent substrate (202)    First transparent conductive layer (206)    Thin film deposition process (208)    Second transparent conductive layer (210)    Composite transparent conductive layer (212)