Patent ID: 8066863

Claim:
A process of electrodepositing a layered Group VIA material structure on a front side of a solar cell workpiece, comprising: providing the solar cell workpiece, the workpiece containing at least one of a Group IB and Group IIIA material; forming a first high resistivity material layer having a thickness of less than about 200 nm directly on the front side of the solar cell workpiece by electrodepositing a first amorphous Group VIA material; transforming the first high resistivity material layer into a first conductive material layer by low temperature heating and crystallizing, wherein the low temperature is selected so that the first conductive material layer does not substantially react with any of the Group IB and Group IIIA materials of the solar cell workpiece during the transforming of the first high resistivity material layer; forming a second high resistivity material layer having a thickness of less than about 200 nm directly on the first conductive material layer by electrodepositing a second amorphous Group VIA material; and transforming the second resistivity material layer into a second conductive material layer by low temperature heating and crystallizing, wherein the low temperature is selected so that the second conductive material layer does not substantially react with any of the Group IB and Group IIIA materials of the solar cell workpiece during the transforming of the second high resistivity material layer.