Patent ID: 8580602

Claim:
A photovoltaic device, comprising: (a) a non-crystalline substrate or superstrate; (b) a first layer adjacent to said superstrate or substrate, the first layer comprising (i) tellurium (Te) and cadmium (Cd) or zinc (Zn), or (ii) Te, Cd and Zn; (c) a second layer adjacent to the first layer, the second layer comprising Cd and Te; and (d) a third layer adjacent to the second layer, the third layer comprising Cd and Te, wherein: (i) the first layer is chemically doped n-type, the second layer is chemically doped p-type, and the third layer is chemically doped p-type; or (ii) the first layer is chemically doped p-type, the second layer is chemically doped p-type, and the third layer is chemically doped n-type.