Patent ID: 7838763
Filing Date: 2010-11-23
Classification: C23C,H01L,Y02E,Y02P

Abstract:
1. A method of manufacturing a solar cell, comprising: depositing a p-type semiconductor absorber layer comprising a copper indium diselenide (CIS) based alloy material by sputtering from a first conductive target and a second conductive target, such that the deposited p-type semiconductor absorber layer is copper deficient; wherein: the CIS based alloy material comprises a copper indium gallium diselenide (CIGS) alloy material in which an atomic ratio of copper to indium and gallium is less than one; the first target is a substantially metal target and the second target is a substantially metal target; the first target comprises the mixture of copper, indium and gallium, such that the atomic ratio of copper to indium and gallium is less than one; the second target comprises the mixture of copper, indium and gallium, such that the atomic ratio of copper to indium and gallium is less than one; and the first target and the second target have an identical composition.