Structural, optical and electrical characterization of Ag doped lead chalcogenide (PbSe) thin films

► (PbSe)100−xAgx thin films has been investigated. ► Polycrystalline nature has been verified by X-ray diffraction. ► Optical absorption data showed the rules of direct transitions predominate. ► Dc conductivity increases with an increase of Ag content in PbSe system. ► Increase of Ag concentration causes a decrease in Eg and ΔEc.