Tungsten Trioxide Film Transmittance (1)

Using WGZ-8 double-beam UV - visible spectrophotometer to analysis transmittance of film, the incident light wavelength range of 200 ~ 800nm, light transmission rate of 0% to 150%. Using sol-gel method produce tungsten trioxide films and the transmission spectra showed maximum light transmittance and wavelength corresponding respectively: 85.3%, 556nm, peaks and troughs in the 350 ~ 600nm wavelength range, light transmittance difference at the peaks and valleys value of 4.4%, the wavelength range which is less than 300nm the light transmittance almost all zeros.

And use magnetron sputtering method produce tungsten trioxide films found maximum light transmittance and the corresponding wavelength ranges were: 90.1%, 572 ~ 582nm which peaks and valleys within the 350 to 650nm wavelength and the difference between the peaks and troughs in the light transmittance is about 21.2%. Comparison two lines of transmittance spectra will know the light transmittance difference is not big which produced by sol-gel method and magnetron sputtering method.

When films produce by magnetron sputtering at 450 ℃ the transmittance of the films dropped by an average of about 8% to 10%, peak shape and position almost unchanged. When the annealing temperature at 500 ℃, the light transmittance films dropped by an average of about 8%, the peak position and peak shape has not changed much.

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