Nanostructured Fe 2 O 3 /TiO 2 thick films prepared by screen printing #

Nanostructured single layered (pure TiO 2 , pure α-Fe 2 O 3 and mixed Fe 2 O 3 /TiO 2 with two different oxide ratios, 2 : 3 and 3 : 2) and double layered (TiO 2 layer over a Fe 2 O 3 layer) thick films have been fabricated by screen printing technology on a glass substrate. The pastes used for film preparation were obtained by adding an organic vehicle to the oxide powders together with a small percentage of binding glass frit. Samples were dried up to 100 °C and sintered at 650 °C/60 minutes. Structural, morphological and optical studies have been carried out using XRD, SEM analyses and UV/Vis spectroscopy. The prepared pure and mixed Fe 2 O 3 /TiO 2 thick films had a homogenous nanostructure without secondary phases. Indirect band gaps were determined from the measured transmission spectra and the obtained values are in the range of literature data.