Patent ID: 8252624

Claim:
A method of forming a solar cell device, comprising: forming a first transparent conductive oxide layer over a first surface of a substrate, wherein the first transparent conductive oxide layer comprises tin and oxygen, and the substrate comprises a glass material having an iron concentration less than about 0.03% by weight; forming a conductive contact layer disposed on the first transparent conductive oxide layer, wherein the resistivity of a combination of the first transparent conductive oxide layer and the conductive contact layer is less than about 10 Ohms per square; and forming a first p-i-n junction on the conductive contact layer, wherein forming the first p-i-n junction comprises: forming a p-doped amorphous silicon layer on the conductive contact layer; forming an interface barrier layer over the p-type amorphous silicon layer, wherein the interface barrier layer comprises silicon carbide; forming an intrinsic type amorphous silicon layer over the interface barrier layer; and forming an n-type microcrystalline silicon layer on the conductive contact layer.