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

Oxygenated multi-walled carbon nanotubes (OMWNTs) were employed as additives in conventional TiO 2 -based photoanodes and platinum-free conducting polymer-based photocathodes. The OMWNTs were induced to form covalent bonds with TiO 2 nanoparticles (NPs) and were successfully intercalated into a poly...

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Bibliographic Details
Published in:The Korean journal of chemical engineering 2021, 38(10), 259, pp.2129-2133
Main Authors: Song, Min-Jung, Jin, Joon-Hyung
Format: Article
Language:English
Subjects:
Additives
Anatase
Biotechnology
Catalysis
Chemistry
Chemistry and Materials Science
Conducting polymers
Covalent bonds
Dye-sensitized solar cells
Dyes
Efficiency
Electronic
Energy conversion efficiency
Industrial Chemistry/Chemical Engineering
Inorganic
Materials (Organic
Materials Science
Multi wall carbon nanotubes
Nanoparticles
Oxygenation
Photoanodes
Photocathodes
Photoelectrochemical devices
Photovoltaic cells
Polystyrene resins
Recombination reactions
Synergistic effect
Thin Films
Titanium dioxide
화학공학
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Summary:Oxygenated multi-walled carbon nanotubes (OMWNTs) were employed as additives in conventional TiO 2 -based photoanodes and platinum-free conducting polymer-based photocathodes. The OMWNTs were induced to form covalent bonds with TiO 2 nanoparticles (NPs) and were successfully intercalated into a poly (3, 4-ethylenedioxy-thiophene)-polystyrene sulfonate (PEDOT:PSS) network. Furthermore, a dye-sensitized TiO 2 -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/TiO 2 /N719//Pt/FTO. Similarly, a 25.6% increase in efficiency was observed by a spray-coated TiO 2 -OMWNT layer as the photoanode instead of simple anatase TiO 2 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.
ISSN:0256-1115
1975-7220
DOI:10.1007/s11814-021-0859-4