A comparative investigation on thermal, structural and optical properties of W and Nb-doped VO2-based thermochromic thin films

In the present study, a simple sol-gel method was applied using different precursors to comparatively investigate thermal, structural and optical properties of W and Nb-doped VO2-based thin films using differential scanning calorimetry, X-ray diffraction (XRD), scanning electron microscopy and temperature-controlled ultraviolet–visible–near infrared spectroscopy techniques. For this purpose, vanadium precursors with different valence states were...