Abstract
Black Ag-Mo alloy films were formed spontaneously on silver (Ag) sheets/targets by composite target sputtering. The morphology, composition, phase, crystal structure and reflectivity of black Ag-Mo alloy films were characterized by SEM, EDS, XRD, TEM and UV spectrophotometer. Results show that Ag-Mo alloy films with conical particle arrays are spontaneously formed on sputtered Ag sheets, and the Ag-Mo alloy films exhibit strong light trapping effect in the visible wavelength range, resulting in a black appearance of the Ag sheets. The strong light-trapping properties can be ascribed to the conical particle arrays closely arranged on the Ag-Mo alloy films, which caused the reflectivity of the Ag sheets to reduce substantially from 90% down to 10%. The Ag-Mo alloy films prepared by magnetron sputtering methods provide a new idea for fabrication of high light trapping materials.
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