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RODRIGO PARRA
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Volume 46 All articles Published: 28 February 2023 Article ID 0038
JACQUELINE HAHN BERNARDI SÉRGIO ANDRÉS ARGUELLO VINÍCIUS CAMPOS DE NOVAIS1 JANINE CARVALHO PADILHA RODRIGO PARRA VLADIMIR LAVAYEN JEFFERSON LUIS FERRARI MÁRCIO SOUSA GÓES
Zinc oxide (ZnO) nanoparticle suspensions were synthesized through a hydrothermal process with the addition of 3-triethylammonium-propanesulphonic acid tetrafluoroborate (TEA-PS.BF$_4$) ionic liquid (IL). Thin films prepared with the resulting suspensions were used as photoanodes for dye-sensitized solar cells (DSSCs). Rietveld refinement of X-ray diffraction patterns showed that the IL influences the anisotropy of crystallite shape, as confirmed by Raman spectroscopy, and microstrain decreases with the IL concentration. Interestingly, the IL modified the ZnO nanoparticle morphology and the average size of the pores of the film. The electrochemical characterization of DSSCs revealed improved photoanode performance with 5 wt% IL (2.23% efficiency and 7.13 mA.cm$^{–2}$ current density) compared with the film without IL (1.93% efficiency and 4.11 mA.cm$^{–2}$ current density). Electrochemical impedance spectroscopy showed that samples with IL exhibited increased resistance to charge transfer at ZnO/electrolyte interface responsible for the observed increased energy conversion.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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