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Influence of citric acid linker molecule on photovoltaic performance of CdS quantum dots-sensitized TiO2 solar cells

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dc.contributor.author Senadeera, G. K. R.
dc.contributor.author Sandamali, W. I.
dc.contributor.author Dissanayake, M. A. K. L.
dc.contributor.author Jaseetharan, T.
dc.contributor.author Perera, V. P. S.
dc.contributor.author Rajendra, J. C. N.
dc.contributor.author Karthikeyan, N.
dc.contributor.author Lahiru, A. W.
dc.date.accessioned 2022-08-26T05:24:21Z
dc.date.available 2022-08-26T05:24:21Z
dc.date.issued 2021-07-02
dc.identifier.citation Bulletin of Materials Science; (2021), pp. 1-11. en_US
dc.identifier.issn 0973-7669
dc.identifier.uri https://doi.org/10.1007/s12034-021-02497-0
dc.identifier.uri http://ir.lib.seu.ac.lk/handle/123456789/6231
dc.description.abstract Influence of citric acid on the photovoltaic properties of the CdS quantum dot-sensitized TiO2 solar cells (QDSSCs) was studied. Tethering of citric acid molecules with both TiO2 and CdS quantum dots (QDs) was confirmed by Fourier transform infrared spectroscopy technique. High-resolution transmission electron microscopic studies revealed that QDs with an average size of *4.5 nm, were tethered with TiO2 nanoparticles of diameter *40 nm. The presence of Cd, S, C, Ti, and O elements in the composite photoanode and their uniform distribution throughout the photoanode were confirmed by energy dispersive X-ray spectroscopy measurements. QDSSCs fabricated with pristine TiO2 photoanode exhibited a short circuit current density (JSC) of 5.80 mA cm-2 and an overall power conversion efficiency (g) of 1.10%, whereas solar cells made with citric acid-treated, photoanode-exhibited a JSC of 8.20 mA cm-2 with 1.50% efficiency under 100 mW cm-2 (AM 1.5) light illumination. This is an impressive 60% increase in the JSC and *a 36% enhancement in the overall power conversion efficiency. Interfacial resistance of QDSSCs is estimated by using electrochemical impedance spectroscopy revealed that citric acid treatment enhanced both the electron injection to the conduction band of the TiO2 from the CdS as well as the overall charge transfer of the device while decreasing the recombination of the photo-generated electrons with their holes in the electrolyte. en_US
dc.language.iso en_US en_US
dc.publisher Springer en_US
dc.subject CdS Capping en_US
dc.subject Quantum Dots (QDs) en_US
dc.subject Citric Acid en_US
dc.subject Sensitization en_US
dc.subject Solar Cells en_US
dc.title Influence of citric acid linker molecule on photovoltaic performance of CdS quantum dots-sensitized TiO2 solar cells en_US
dc.type Article en_US


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