In this study, TiO2 films were grown at room temperature by sol-gel process using titanium (IV)-isopropylat
as precursor. XRD, EDS and MEB analyses proved that an eventual annealing treatment caused the TiO2
amorphous phase to shift to a crystalline anatase phase. Optical measurements were carried out via absorbance
spectra in 500–2500 nm wavelength domain. From these optical measurements, the temperature-dependent conjoint
optical and thermal properties were deduced using the Amlouk-Boubaker opto-thermal expansivity ψAB.