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Synergistic effect of photoanode and photocathode modified with oxygenated multi-walled carbon nanotubes in dye-sensitized solar cells

  • Materials (Organic, Inorganic, Electronic, Thin Films)
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Abstract

Oxygenated multi-walled carbon nanotubes (OMWNTs) were employed as additives in conventional TiO2-based photoanodes and platinum-free conducting polymer-based photocathodes. The OMWNTs were induced to form covalent bonds with TiO2 nanoparticles (NPs) and were successfully intercalated into a poly (3, 4-ethylenedioxy-thiophene)-polystyrene sulfonate (PEDOT:PSS) network. Furthermore, a dye-sensitized TiO2-OMWNT-based photoanode and a PEDOT:PSS-OMWNT-based electrocatalytic photocathode were both assembled into a photoelectrochemical cell. Replacing the typical platinized photocathode with PEDOT:PSS-OMWNTs enhances the energy conversion efficiency by approximately 13.9% when compared to a typical dye-sensitized solar cell composed of FTO/TiO2/N719//Pt/FTO. Similarly, a 25.6% increase in efficiency was observed by a spray-coated TiO2-OMWNT layer as the photoanode instead of simple anatase TiO2 NPs. In addition, 42.9% higher efficiency was achieved by utilizing the two OMWNT-modified electrodes together. This excellent performance is attributed to the synergistic effect of the OMWNT-modified photoanode and photocathode. This may be related to the effective suppression of unwanted back transport and recombination reactions.

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Correspondence to Joon-Hyung Jin.

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11814_2021_859_MOESM1_ESM.pdf

Synergistic effect of photoanode and photocathode modified with oxygenated multi-walled carbon nanotubes in dye-sensitized solar cells

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Song, MJ., Jin, JH. Synergistic effect of photoanode and photocathode modified with oxygenated multi-walled carbon nanotubes in dye-sensitized solar cells. Korean J. Chem. Eng. 38, 2129–2133 (2021). https://doi.org/10.1007/s11814-021-0859-4

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  • DOI: https://doi.org/10.1007/s11814-021-0859-4

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