Influence of Doping on Optical Properties of (CdS:Fe+3)Thin Films Prepared by Chemical Spray pyrolysis

Abstract

In the present work, undoped CdS and doped with iron CdS:Fe+3 thin films have been prepared by chemical spray pyrolysis method on glass substrate with different temperature from cadmium nitrate solution with constant thickness(450 ± 5 nm), and study the effect of the percentage of doping with iron on optical properties of prepared films.
 The optical properties have been studied from transmittance and absorbance spectral within wavelengths range (380-900 nm). The results showed that all the prepared films has direct electronic transitions and optical energy gap between (2.31-2.44 eV). They also showed that the transmittance and optical energy gap of films prepared from nitrate solution increase with increasing of substrate temperature, then transmittance start downward with the continued increase in temperature (400, 450 oC), and a decrease in the optical energy gap with increasing doping percentage with iron.

Effect of laser energy on grain size of cadmium oxide nanoparticles in ethanol by PLD method

“…The Z axis represents surface thickness which means the highest peak of crystalline crystals on the surface. By comparing the three-dimensional images of the CdO samples according to the different deposition energies, it is proved that the higher the deposition energy is the less the thickness, which ensures the regularity and crystalline growth in addition to the even spread of grains, thus reducing the defects in the sample [8]. The values of grain particle size and distribution of grain aggregates obtained by surface growth are illustrated in Figures (1c), (2c), (3c), (4c), (5c) The diagram shows percentage of grain particle size distributions on the surface of the samples.…”