Optical properties of in vacuo lithiated nanoporous WO3:Mo thin films as determined by spectroscopic ellipsometry
نویسندگان
چکیده
Incorporation of Mo into pure WO3 thin films is interest for electrochromic devices, as it improves colour neutrality in the dark state. Existing literature still lacks reliable quantitative data on complex dielectric function such coatings. In this study, we deposited and MoxW1?xO3 by magnetron sputtering subsequently characterised them X-ray photoelectron spectrometry (XPS), grazing incidence diffraction (GIXRD) scanning electron microscopy (SEM). vacuo-lithiation was performed to incorporate lithium inside films. The lithiated were evaluated with variable-angle spectroscopic ellipsometry (VASE) from 340 990 nm transmission measurements 330 2100 nm. ellipsometric analysed a straightforward model composed sum Tauc-Lorentz Lorentz oscillators dispersion laws. One oscillator positioned around 1.3 eV associated reduction W6+ W5+ incorporation. 2.3 additional states band-gap due presence film. proposed allows better comprehension involved electronic transitions determine refractive index extinction coefficient materials precisely.
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ژورنال
عنوان ژورنال: Optical Materials
سال: 2021
ISSN: ['1873-1252', '0925-3467']
DOI: https://doi.org/10.1016/j.optmat.2021.111091