Influence of surface passivation on optical properties of spray pyrolysis deposited Pd-F:SnO2

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dc.contributor.author Munguti, Lawrence K.
dc.contributor.author Mwathe, Patrick M.
dc.contributor.author Musembi, Robinson
dc.contributor.author Munji, Mathew
dc.contributor.author Odari, Benjamin
dc.contributor.author Ntilakigwa, Alex A.
dc.contributor.author Nguu, John
dc.contributor.author Aduda, Bernard
dc.contributor.author Muthoka, Boniface
dc.date.accessioned 2016-07-15T09:06:04Z
dc.date.available 2016-07-15T09:06:04Z
dc.date.issued 2014
dc.identifier.citation International Journal of Materials Science and Applications 2014; 3(5): 137-142 en_US
dc.identifier.issn 2327-2635
dc.identifier.issn 2327-2643
dc.identifier.uri http://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmsa.20140305.11.pdf
dc.identifier.uri http://repository.seku.ac.ke/handle/123456789/2616
dc.description doi: 10.11648/j.ijmsa.20140305.11 en_US
dc.description.abstract Pd-F:SnO2 thin films have been prepared by spray pyrolysis technique using an alcoholic precursor solution consisting of stannic chloride (SnCl4.5H20), ammonium fluoride (NH4F) and palladium chloride (PdCl2). Optimization on the deposition parameters has been done in order to obtain high quality thin films. The effect of varying the fluorine content on the optical properties of Pd-F:SnO2 thin films were studied. Data for transmittance and reflectance in the wavelength range from 300nm – 2500nm was measured using the solid spec 3700DUV spectrophotometer. The calculated optical band gap of the as prepared thin films has been found to range from 3.8eV to 4.11eV. Fluorine incorporation for Pd-F:SnO2 has been found to have a narrowing effect on the band gap, but at its higher concentration the band gap has been seen to increase. The band gap narrowing is due to the incorporation of F- ions in the crystal lattice therefore giving rise to donor levels in the SnO2 band gap which is an essential characteristic for the gas sensor applications. Both annealing and passivation have been found to have very insignificant change in optical band gap of Pd-F:SnO2. en_US
dc.language.iso en en_US
dc.publisher Science Publishing Group en_US
dc.subject Spray Pyrolysis en_US
dc.subject Fluorine Doping en_US
dc.subject Palladium Doping en_US
dc.subject Co-Doping en_US
dc.subject Palladium and Fluorine Co-Doping en_US
dc.subject Annealing en_US
dc.subject Passivation en_US
dc.subject Pd and F Co-Doped SnO2 (Pd-F:SnO2) en_US
dc.title Influence of surface passivation on optical properties of spray pyrolysis deposited Pd-F:SnO2 en_US
dc.type Article en_US


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