Synthesis and characterisation of chemical bath deposited TiO2 thin-films

Abstract

A series of titania thin films was prepared by chemical bath deposition (CBD) of TiCl 3 on indium tin oxside (ITO) glass at room temperature, followed by calcinations at 500°C for 4 hours. The effect of cyclic deposition on phase composition, microstructure and electrical resistivity of TiO 2 thin films was characterised using X-ray diffraction, scanning electron microscopy and four-point probe respectively. Results showed that TiO 2 films produced by single deposition cycle were amorphous. In contrast, those produced by 5 and 6 deposition cycles were partly amorphous and partly crystalline with the formation of rutile. Both the film thickness and electrical resistivity increased with an increase in the number of deposition cycles.

Highly oriented and physical properties of sprayed anatase Sn-doped TiO2 thin films with an enhanced antibacterial activity

“…The film doped with 6 at.% of tin is suitable for fabrication of DSSC because it exhibits uniform distribution of spherical grains with large in size, also with the porous nature of the film. The porous films play an interesting role in DSSC in enhancing dye-sensitization when these TiO 2 films are used in solar cell application (Manurung et al 2013;Allah et al 2007). However, at higher doping concentration (8 at.%), the growth of grains is suppressed and segregated due to the presence of compressive stress in the film and it is in agreement with the XRD results.…”

“…Another importance of TiO 2 in recent years is the specialization of self-sterilizing surfaces and their implementation in hospitals because of its most reliable and stable under irradiation (Svetlana Nikobuna Pleskova et al 2012). TiO 2 thin films have been deposited in the past by many research workers using different techniques such as sputtering (Jamuna-Thevi et al 2011), sol-gel (Mechiakh et al 2011), pulse laser deposition (Fotsa Ngaffo et al 2007), chemical bath deposition (Manurung et al 2013) and spray pyrolysis technique (Weng et al 2005). Among these techniques, the spray pyrolysis technique is economic, very simple and suitable for large area thin film preparation.…”

Synthesis of Nickel-Doped TiO2 Thin Films and Their Structural and Optical Properties at Different Annealing Temperatures

“…Also the transmittance increases gradually by increase of O 2 content in (Ar+O 2 ) gas and of annealing temperature. Furthermore, the absorption edge of Ni-doped TiO 2 thin films is slightly shifted towards visible range [4][5][6][7][8]. The absorption coefficient α was calculated from the optical transmittance T using the Lambert formula, α = 1/t ln(1/T ) [9] where, t is the thickness of films.…”

“…Titanium oxide (TiO 2 ) thin films, owing to their excellent properties including, chemical stability, low cost, large optical band gap and photocatalytic activity at visible light [1][2][3][4], have attracted much attentions in recent years. Metal and nonmetal doping of TiO 2 have been used to extend the absorption edge towards the visible light range and to improve the photocatalytic activity [5][6][7][8].…”

“…Metal and nonmetal doping of TiO 2 have been used to extend the absorption edge towards the visible light range and to improve the photocatalytic activity [5][6][7][8]. Several physical and chemical methods have been reported for growth of TiO 2 and doped-TiO 2 thin films [1][2][3][4][5][6][7][8]. In this work, nickel doped TiO 2 thin films were grown on glass substrates by means of DC reactive magnetron sputtering.…”