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Article

Thin Film Fabrication by Pulsed Laser Deposition from TiO2 Targets in O2, N2, He, or Ar for Dye-Sensitized Solar Cells

1
Faculty of Physics, University of Bucharest, 077125 Magurele, Romania
2
Department of Physics, Ovidius University of Constanta, 900527 Constanta, Romania
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Lasers Department, National Institute for Lasers, Plasma and Radiation Physics, 077125 Magurele, Romania
4
Laboratory of Optical Processes in Nanostructured Materials, National Institute of Materials Physics, 077125 Magurele, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Latini
Coatings 2022, 12(3), 293; https://doi.org/10.3390/coatings12030293
Received: 13 December 2021 / Revised: 17 February 2022 / Accepted: 19 February 2022 / Published: 22 February 2022
Active semiconductor layers of TiO2 were synthesized via pulsed laser deposition in He, N2, O2, or Ar to manufacture DSSC structures. As-prepared nanostructured TiO2 coatings grown on FTO were photosensitized by the natural absorption of the N719 (Ruthenium 535-bis TBA) dye to fabricate photovoltaic structures. TiO2 photoanode nanostructures with increased adsorption areas of the photosensitizer (a combination with voluminous media) were grown under different deposition conditions. Systematic SEM, AFM, and XRD investigations were carried out to study the morphological and structural characteristics of the TiO2 nanostructures. It was shown that the gas nature acts as a key parameter of the architecture and the overall performance of the deposited films. The best electro-optical performance was reached for photovoltaic structures based on TiO2 coatings grown in He, as was demonstrated by the short-circuit current (Isc) of 5.40 mA, which corresponds to the higher recorded roughness (of 44 ± 2.9 nm RMS). The higher roughness is thus reflected in a more efficient and deeper penetration of the dye inside the nanostructured TiO2 coatings. The photovoltaic conversion efficiency (η) was 1.18 and 2.32% for the DSSCs when the TiO2 coatings were deposited in O2 and He, respectively. The results point to a direct correlation between the electro-optical performance of the prepared PV cells, the morphology of the TiO2 deposited layers, and the crystallinity features, respectively. View Full-Text
Keywords: dye-sensitized solar cells; PLD; TiO2; photovoltaic conversion efficiency; SEM; XRD; AFM dye-sensitized solar cells; PLD; TiO2; photovoltaic conversion efficiency; SEM; XRD; AFM
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MDPI and ACS Style

Albu, D.F.; Lungu, J.; Popescu-Pelin, G.; Mihăilescu, C.N.; Socol, G.; Georgescu, A.; Socol, M.; Bănică, A.; Ciupina, V.; Mihailescu, I.N. Thin Film Fabrication by Pulsed Laser Deposition from TiO2 Targets in O2, N2, He, or Ar for Dye-Sensitized Solar Cells. Coatings 2022, 12, 293. https://doi.org/10.3390/coatings12030293

AMA Style

Albu DF, Lungu J, Popescu-Pelin G, Mihăilescu CN, Socol G, Georgescu A, Socol M, Bănică A, Ciupina V, Mihailescu IN. Thin Film Fabrication by Pulsed Laser Deposition from TiO2 Targets in O2, N2, He, or Ar for Dye-Sensitized Solar Cells. Coatings. 2022; 12(3):293. https://doi.org/10.3390/coatings12030293

Chicago/Turabian Style

Albu, Dorel F., Jeanina Lungu, Gianina Popescu-Pelin, Cristian N. Mihăilescu, Gabriel Socol, Adrian Georgescu, Marcela Socol, Alexandra Bănică, Victor Ciupina, and Ion N. Mihailescu. 2022. "Thin Film Fabrication by Pulsed Laser Deposition from TiO2 Targets in O2, N2, He, or Ar for Dye-Sensitized Solar Cells" Coatings 12, no. 3: 293. https://doi.org/10.3390/coatings12030293

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