Studying the optical properties of CdO and CdO : bi thin films

Abstract EN

Cadmium Oxide and Bi doped Cadmium Oxide thin films are prepared by using the chemical spray pyrolysis technique a glass substrate at a temperature of (400C) with volumetric concentration (2,4)%.

The thickness of all prepared films is about (400±20) nm.

Transmittance and Absorbance spectra are recorded in the wave length ranged (400-800) nm.

The nature of electronic transitions is determined, it is found out that these films have directly allowed transition with an optical energy gap of (2.37( eV for CdO and ) 2.59, 2.62) eV for (2% ,4%) Bi doped CdO respectively.

The optical constants have been evaluated before and after doping.