Concentration Dependent Optical and Structural Properties of Mo doped ZnTe Thin Films Prepared by e-beam Evaporation Method

ZnTe doped with different concentrations of Molybdenum (Mo) thin films were prepared by e- beam evaporation method and the effect of doping on Optical and Structural properties of the thin films were studied. XRD results confirmed the doping of Mo through its signature peaks at 27.6° for MoTe2 (011) and 38.40° for Mo (220) along with the ZnTe (111) peak at 25.3°. AFM images indicated the crystalline nature of ZnTe:Mo. The optical response observed through UV-VIS spectrometer revealed the transmittance was decreased from 50% (undoped) to 8% (doped with 25wt%). Similarly, the optical energy gap was also decreased from 2.27eV (undoped) to 1.7eV (doped with 25wt%). The results of the present study elucidate that ZnTe:Mo thin films can be considered as a good back contacts for photovoltaic (PV) applications, optical devices in general and CdTe based thin films solar cells in particular.