Physical properties of Mg doped ZnS thin films via spray pyrolysis

Abstract

Chemical spray pyrolysis (CSP) was utilized to create pure Zinc Sulfide (ZnS) and magnesium (Mg) doped thin films on a clean glass substrate at a temperature equal to 400°C. X-ray diffraction test revealed a cubic wurtzite crystal structure with average crystallite sizes of 10.99 and 12.27 nm for ZnS and ZnS: Mg, respectively. XRD analysis of the doped films revealed a polycrystalline structure with a predominant peak along the (220) plane and additional peaks along the (111), (200), and (222) planes. The grain size raised from 10.99 to 12.27 nm as a result of the XRD patterns. The increase in Mg content from 0% to 3%, affect the bandgap that fell from 3.52 to 3.42 eV. As the Mg content increased, the transmittance and refractive index of the films was lowered.

Cation exchange doping by transition and non-transition metals: embracing luminescence for band gap tunability in a ZnS lattice

“…Because MgS has a wider band gap than ZnS (3.72 eV), the Mg dopant can also enlarge the band gap in ZnS QDs. [45][46][47] In nanocrystalline Zn 1Àx Mg x O thin films, Sandeep et al found that by altering the Mg content, the optical energy gap could be adjusted between 3.40-3.83 eV. For applications like optical windows and transparent conducting oxides in the UV spectral range, Zn 1Àx Mg x O is a viable contender.…”