Enhanced Photovoltaic Properties of Cadmium Sulfide Quantum Dot Sensitized TiO2 Solar Cells with Novel SnO2 Based Counter Electrode

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dc.contributor.authorSandamali, W.I.
dc.contributor.authorSenadeera, G.K.R.
dc.contributor.authorDissanayake, M.A.K.L.
dc.contributor.authorJaseetharan, T.
dc.contributor.authorKumari, J.M.K.W.
dc.contributor.authorUmair, K.
dc.contributor.authorPerera, V.P.S.
dc.contributor.authorRajendra, J.C.N.
dc.contributor.authorKarthikeyan, N.
dc.date.accessioned2022-10-06T06:54:53Z
dc.date.available2022-10-06T06:54:53Z
dc.date.issued2021
dc.description.abstractQuantum dot sensitized solar cells (QDSSCs) have gained increased attention due to the unique properties of the semiconductor quantum dots (QDs), as light captivating materials. QDs facilitates multiple exciton generation, tunable bandgaps, high absorption coefficient, and low power consumption. Many studies have been carried out towards producing affordable QDSSCs with high power conversion efficiencies, utilizing these properties. As a critical component of QDSSCs, counter electrodes hold significant importance among these studies. Platinum (Pt), a widely used counter electrode with QDSSCs, is being disfavored due to high cost, diminishing material supply, and reduced catalytic activity, when used with polysulfide electrolyte which is the most common electrolyte for QDSSCs, due to surface, adsorbed sulphur. Therefore, substantial investigations have been carried out in searching for an alternative, affordable and effective counter electrode in these devices. Among the suitable materials, tin oxide (SnO2), a wide bandgap semiconductor, has become a promising candidate for counter electrode due to its high chemical stability, high electron mobility, low cost and environmentally friendly nature. In this study, counter electrodes were fabricated by depositing SnO2 films on fluorine-doped tin oxide (FTO) glass substrates by using a simple spray pyrolysis technique. These counter electrodes were characterized by scanning electron microscopic and Raman techniques. Photovoltaic properties of CdS quantum dots sensitized TiO2 solar cells with polysulfide electrolyte were tested by using this novel counter electrode. QDSSCs fabricated with optimized SnO2 counter electrode showed 1.47% power conversion efficiency under the illumination of 100 mW cm-2, whereas the devices fabricated with conventional Pt coated counter electrodes showed 1.08% under the same conditions. Therefore, about 36% enhancement in power conversion efficiency could be obtained by employing this novel low-cost counter electrode in these QDSSCs. Keywords: Counter electrode; SnO2; CdS; Quantum dot sensitized solar cellen_US
dc.identifier.isbn978-624-5856-04-6
dc.identifier.urihttp://www.erepo.lib.uwu.ac.lk/bitstream/handle/123456789/9754/Page%20318%20-%20IRCUWU2021%20-%20458%20-%20W.I.%20Sandamali%20-%20Enhanced%20Photovoltaic%20Properties%20of%20Cadmium%20Sulfide%20Quantum%20Dot%20Sensitized%20TiO2%20Solar%20Cells.pdf?sequence=1&isAllowed=y
dc.language.isoenen_US
dc.publisherUva Wellassa University of Sri Lankaen_US
dc.subjectMineral Sciencesen_US
dc.subjectMaterials Sciencesen_US
dc.subjectSensitized Solar Cellen_US
dc.subjectElectronic Engineeringen_US
dc.titleEnhanced Photovoltaic Properties of Cadmium Sulfide Quantum Dot Sensitized TiO2 Solar Cells with Novel SnO2 Based Counter Electrodeen_US
dc.title.alternativeInternational Research Conference 2021en_US
dc.typeOtheren_US
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