Optical constants of cobalt chloride doped poly (vinyl alcohol) thin films
Abstract
The investigation on variation of the optical band energy gap Eg of a polymer doped with colored mineral salt has been receiving increasing attention. In recent study, Eg and other optical properties of poly vinyl alcohol PVA doped with cobalt chloride CoCl2 were studied in wavelength range of (400-900) nm. thin films (PVA-CoCl2) were prepared through the blending solution method routine. Allowed direct transition results Eg showed that decreasing in its value with increasing the concentration of CoCl2.