Effect of Switching the Preparation Solution for CdSe Films by (CBD) Method on, Thickness, Optical and Structure Properties of the Films.

In this work, cadmium selenide (CdSe) thin films were prepared by two methods of chemical bath deposition (CBD) on glass substrate, where nitrate Cd (NO3)2 and sodium selenosulfite Na2SeSO3 used. The conditions at 70 oC temperature for 6 hours pH = 9 (during deposition). the first method solution was changed every hours, while continued without changing in second method. It found that switching affects value thickness film which increase too about double. energy gap reduced 0.2eV when switched. As (XRD) switched appeared polycrystalline, a hexagonal cubic structure growing (002) direction. A crystal with growth direction not changed. (SEM) they have spherical, sheets, flower clusters nano-shapes distributed surface.