Structural, electrical and optical properties of silver selenide thin films

We study the structural, electrical and optical properties of silver selenide thin films prepared by reactive evaporation. From the Hall effect study, at room temperature we find a mobility of 2000 cm2 V−1 s−1 and a carrier concentration of 1018 cm−3. The thermoelectric power is measured from room temperature up to 200 °C. X-ray diffraction indicates that the as-prepared films are polycrystalline in nature. The composition and morphology are determined using energy dispersive x-ray analysis and scanning electron microscopy (SEM). The optical bandgap, which is direct-allowed, is 1.58 eV.