The Effect of Polyvinylpyrrolidone on the Optical Properties of the Ni-Doped ZnS Nanocrystalline Thin Films Synthesized by Chemical Method

Figure 1

The X-ray diffraction spectra of samples B(5 : 0); B(5 : 1); B(5 : 4)—curves a, b, c, and respectively—and pure ZnS nanopowders (inset).