Influence of Co Transplantation SnO2 Nano Film on the Structural and Optical Properties Using Radio Frequency Magnetron Sputtering

In this research, investigated characterization of pure and Cobalt doped Tin dioxide SnO2:Co with 3, 5 and 7 wt% fabricated using radio frequency magnetron sputtering method deposited on glass surfaces. The results showed that prepared SnO2:Co were nano films and poly crystalline in form with favored reflection permanently (110) plan, and the crystallite size decreases as the Co concentration increased 9-14 nm. The optical properties represented by the transmittance of perspicuous and cobalt transplantation SnO2 layers were studied and results showed that highest transmittance obtained was 91% in the pure films and decreased to 78% as the Co concentration increased; the wavelength range was 300-900 nm due to be the increasing of the Co amount during the deposition, leading to a linear increase in mobility and carrier concentration, until a threshold of Co content was overcome and from that point onward the mobility began to decrease. Optical energy gaps of perspicuous and Co transplantation SnO2 nano layers were determined and the energy gap was reduced from 3.50 eV of perspicuous nano layers to 3.29 eV for the highest transplantation concentration.