In an alternative aspect, the XsunX Process provides a solar cell structure that is transparent. The structure includes a transparent substrate, which can be selected from glass, crystal, plastic, Mylar, and other substrates, including those that have low melting points. A conductive layer is formed overlying the transparent substrate. A first polycrystalline silicon layer from a first amorphous silicon layer of a first dopant type is formed overlying the first conductive layer. The structure also includes a second polycrystalline silicon layer from a second amorphous silicon layer of a second dopant type overlying the first polycrystalline silicon layer, and a second conductive layer overlying the second polycrystalline silicon layer. The combination of these layers forms a transparent structure.

In a further aspect, the XsunX Process provides a method for fabricating a structure comprising a transparent solar cell structure. The method includes forming a first conductive layer overlying a transparent substrate, and forming a first amorphous silicon layer overlying the first conductive layer. The method also includes converting the first amorphous silicon layer into a first polycrystalline silicon, and forming a second amorphous silicon layer overlying the first amorphous silicon layer. A step of converting the second amorphous silicon layer into a second polycrystalline silicon is included. The method also includes forming a second conductive layer overlying the second amorphous silicon layer. The combination of these steps forms a transparent solar cell structure overlying the substrate.

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