NOVELTY - Processing (M1) a photovoltaic material using a sputtering process involves: (A) providing at least one transparent substrate having overlying first electrode layer; (B) forming an overlying copper and gallium layer from a first target including a copper and a gallium species; (C) forming an indium layer overlying the copper and the gallium layer from a second target including indium species; (D) forming a sodium bearing layer overlying the indium layer, to form a composite film; and (E) subjecting composite film to at least a thermal treatment to form a chalcopyrite absorber layer.    USE - For producing a chalcopyrite absorber layer photovoltaic material composite film (claimed), useful for fabricating thin film solar cells or photovoltaic cells.    ADVANTAGE - The process provides efficient in-chamber sputtering process to perform the sodium doping to achieve a well controlled sodium concentration in the formed absorber precursor layer. The method simplifies the doping process with optional interchangeable order to perform sputtering processes that leads to the formation of the composite film.    DETAILED DESCRIPTION - Processing (M1) a photovoltaic material using a sputtering process involves:    (A) providing at least one transparent substrate having an overlying first electrode layer;    (B) forming, using a first sputtering process within a first chamber, an overlying copper and gallium layer from a first target including a copper species and a gallium species;    (C) forming, using a second sputtering process within the first chamber, an indium layer overlying the copper and the gallium layer from a second target including an indium species;    (D) forming, using a third sputtering process within the first chamber, a sodium bearing layer overlying the indium layer, to form a composite film including the copper and gallium layer, the indium layer, and the sodium bearing layer; and    (E) subjecting the composite film to at least a thermal treatment to form a chalcopyrite absorber layer comprising copper, indium, gallium, and sodium.