Influence of Pore Size on the Optical and Electrical Properties of Screen Printed TiO2 Thin Films

Citation:
Simiyu J, Domtau DL, Ayieta EO, Asiimwe GM, Mwabora JM. "Influence of Pore Size on the Optical and Electrical Properties of Screen Printed TiO2 Thin Films." Advances in Materials Science and Engineering. 2016;2016. copy at http://profiles.uonbi.ac.ke/simiyuj/publications/influence-pore-size-optical-and-electrical-properties-screen-printed-tio2-thin-

Abstract:

Influence of pore size on the optical and electrical properties of TiO2 thin films were studied. TiO2 thin films with different weight percentages (wt %) of carbon black were deposited by screen method on fluorine doped tin oxide (FTO) coated on glass substrate. Carbon black decomposed on annealing and artificial pores were created in the films. All the films were 3.2 ┬Ám thick as measured by a surface profiler. UV-VIS-NIR spectrophotometer was used to study transmittance and reflectance spectra of the films in the photon wavelength of 300-1500 nm while absorbance was studied in the range of 350-900 nm. Band gaps and refractive index of the films were studied using the spectra. Reflectance, absorbance and refractive index were found to increase with concentrations of carbon black. There was no significant variation in band gaps of films with change in carbon black concentrations. Transmittance reduced as the concentration of carbon black in TiO2 increased. Currents and voltages (I-V) characteristics of the films were measured by a 4 point-probe. Resistivity (

UoN Websites Search