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dc.contributor.authorMosiori, Cliff Orori
dc.contributor.authorMaera, John
dc.contributor.authorNjoroge, Kamande W.
dc.contributor.authorShikambe, Reuben T.
dc.contributor.authorMunji, M. K.
dc.contributor.authorMagare, Robert
dc.date.accessioned2016-06-27T13:33:31Z
dc.date.available2016-06-27T13:33:31Z
dc.date.issued2015
dc.identifier.citationEngineering International, Volume 3, No.1, 2015en_US
dc.identifier.issn24093629
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/14807
dc.description.abstractA number of models have been developed to describe electron transfer between electrolytes and group II–VI binary semiconductors. In this report, a study was conducted to describe and model electron transfer between an inorganic semiconductor, (i.e. CdS) and a ferric oxidizing/reducing agent [i.e. K3Fe(CN)6/K4Fe(CN)6]. We describe the interfacial electron transfer using the semi-classical theory approaches as described by Marcus and later developed by Gerischer and therefore called Gerischer model as it is applied to heterogeneous electron transfer in a semiconductor - electrolyte interface. CdS thin films were grown by electro-deposition method on the indium tin oxide (ITO) substrates and were used as electrodes. The data collected was used to determine the kinetic constant rates and re-orientation energies as measured in the solutions with different concentration of redox system, Fe+3/ Fe+2. Experiments showed that when concentration of oxidized species increased and causing an increase in 2 F, redox E f activity, the kinetic constant rates decreases inversely. Equally light induced current at 0.0V/Ag was higher when the ratio of the oxidant-reductant (i.e. 2/0.02 and 0.2/0.02) was high. EIS studies revealed that for the two ratios of. 2/0.02 and 0.2/0.02, the difference of current density was comparable to the transfer of the charge carriers for the oxidant-reductant electrolyte at 2/0.02 with respect to 0.2/0.02. Key words Fe+3/ Fe+2 Oxidant-Reductant electrolyte; cadmium sulfide; Gerischer model; Indium tin oxide, ITO, ITO/CdS interface, Marcusen_US
dc.language.isoenen_US
dc.publisherABC Journalsen_US
dc.subjectFe+3/ Fe+2 Oxidant-Reductant electrolyteen_US
dc.subjectCadmium sulfideen_US
dc.subjectGerischer modelen_US
dc.subjectIndium tin oxideen_US
dc.subjectITOen_US
dc.subjectITO/CdS interfaceen_US
dc.subjectMarcusen_US
dc.titleModeling transfer of electrons between energy states of an electrolyte and CdS thin films using Gerischer Modelen_US
dc.typeArticleen_US


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