Abstract
Evaporated films of MocW1-cO3 including MoO3 and WO3 have been prepared, and the electrochromic absorption spectra have been analyzed on the basis of the small polaron absorption model. Thermomodulation spectroscopy measurements are performed in order to make the analysis precisely. The polaron and phonon energies are determined in the case of the MoO3 and WO3 films. In the mixed films, low energy region of the spectra is represented well by either spectrum of WO3 or MoO3 film. Peak photon energy of the absorption band in the mixed film depends on both the Mo fraction and the amount of injected charges.
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