Abstract
Cadmium tin oxide Cd2SnO4 thin films with a thickness of 228.5 nm were prepared by RF magnetron sputtering technique on glass substrates at room temperature. AFM has been utilized to study the morphology of these films as a function of annealing temperature at the nanoscale. The optical properties of these films, such as the transmittance, T(λ), and reflectance, R(λ), have been studied as a function of annealing temperature. The optical constants, such as optical energy gap, width of the band tails of the localized states, refractive index, oscillatory energy, dispersion energy, real and imaginary parts of both dielectric constant and optical conductivity have been found to be affected by changing the annealing temperature of the films.
Highlights
Tin oxide SnO2, Indium oxide InO3, and Zink oxide ZnO are good examples of degenerate semiconductors which are highly transparent and conducting in the family of binary transparent conducting oxides (TCOs)
It is clear that the change in the transmittance increases with increasing annealing temperature may be due to some improvements in film properties
The transmittance increases with increasing the incident photon wavelength in the optical spectra range, after that it continued increasing till wavelength of 900 nm and it seems to be independent on photon wavelength
Summary
Tin oxide SnO2, Indium oxide InO3, and Zink oxide ZnO are good examples of degenerate semiconductors which are highly transparent and conducting in the family of binary transparent conducting oxides (TCOs). It is found that it has wide applications as transparent electrode, flat panel display, heat reflective coatings on energy-efficient windows, and electrochromics in smart windows [7]-[9] solar cells [10] [11], abrasion resistance coatings [12], corrosion resistant coatings [13], gas sensors [14], ohmic contacts to surface-emitting lasers [15] [16], ohmic contacts to photodetectors [17] [18], Shottky contacts to photodetectors [19]-[23], and heat mirrors for energy efficient windows and light bulbs [24] The properties of these films are highly dependent on the technique of deposition and the substrate upon which they are deposited. The obtained thin films have been studied under various conditions especially as a function of annealing temperature that to our knowledge has been paid a little attention
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