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Sudhagar P, Asokan K, Jung JH, et al. Efficient Performance of Electrostatic Spray-Deposited TiO2 Blocking Layers in Dye-Sensitized Solar Cells after Swift Heavy Ion Beam Irradiation. Nanoscale Res Lett. 2010;6(1):30doi: 10.1007/s11671-010-9763-2.
Sudhagar, P., Asokan, K., Jung, J. H., Lee, Y. G., Park, S., & Kang, Y. S. (2011). Efficient Performance of Electrostatic Spray-Deposited TiO2 Blocking Layers in Dye-Sensitized Solar Cells after Swift Heavy Ion Beam Irradiation. Nanoscale research letters, 6(1), 30. https://doi.org/10.1007/s11671-010-9763-2
Sudhagar, P, et al. "Efficient Performance of Electrostatic Spray-Deposited TiO2 Blocking Layers in Dye-Sensitized Solar Cells after Swift Heavy Ion Beam Irradiation." Nanoscale research letters vol. 6,1 (2011): 30. doi: https://doi.org/10.1007/s11671-010-9763-2
Sudhagar P, Asokan K, Jung JH, Lee YG, Park S, Kang YS. Efficient Performance of Electrostatic Spray-Deposited TiO2 Blocking Layers in Dye-Sensitized Solar Cells after Swift Heavy Ion Beam Irradiation. Nanoscale Res Lett. 2011 Dec;6(1):30. doi: 10.1007/s11671-010-9763-2. Epub 2010 Sep 16. PMID: 27502653; PMCID: PMC3211366.
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Nanoscale Res Lett. 2011 Dec;6(1):30. doi: 10.1007/s11671-010-9763-2. Epub 2010 Sep 16.

Efficient Performance of Electrostatic Spray-Deposited TiO2 Blocking Layers in Dye-Sensitized Solar Cells after Swift Heavy Ion Beam Irradiation.

Nanoscale research letters

P Sudhagar, K Asokan, June Hyuk Jung, Yong-Gun Lee, Suil Park, Yong Soo Kang

Affiliations

  1. Center for Next Generation Dye-Sensitized Solar Cells, WCU Program, Department of Energy Engineering, Hanyang University, Seoul, 133-791, South Korea.
  2. Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi, 110 067, India.
  3. School of Chemical and Biological Engineering, Seoul National University, Seoul, South Korea.
  4. Center for Next Generation Dye-Sensitized Solar Cells, WCU Program, Department of Energy Engineering, Hanyang University, Seoul, 133-791, South Korea. [email protected].

PMID: 27502653 PMCID: PMC3211366 DOI: 10.1007/s11671-010-9763-2

Abstract

A compact TiO2 layer (~1.1 μm) prepared by electrostatic spray deposition (ESD) and swift heavy ion beam (SHI) irradiation using oxygen ions onto a fluorinated tin oxide (FTO) conducting substrate showed enhancement of photovoltaic performance in dye-sensitized solar cells (DSSCs). The short circuit current density (Jsc = 12.2 mA cm(-2)) of DSSCs was found to increase significantly when an ESD technique was applied for fabrication of the TiO2 blocking layer, compared to a conventional spin-coated layer (Jsc = 8.9 mA cm(-2)). When SHI irradiation of oxygen ions of fluence 1 × 10(13) ions/cm(2) was carried out on the ESD TiO2, it was found that the energy conversion efficiency improved mainly due to the increase in open circuit voltage of DSSCs. This increased energy conversion efficiency seems to be associated with improved electronic energy transfer by increasing the densification of the blocking layer and improving the adhesion between the blocking layer and the FTO substrate. The adhesion results from instantaneous local melting of the TiO2 particles. An increase in the electron transport from the blocking layer may also retard the electron recombination process due to the oxidized species present in the electrolyte. These findings from novel treatments using ESD and SHI irradiation techniques may provide a new tool to improve the photovoltaic performance of DSSCs.

Keywords: Dye-sensitized solar cells; Impedance spectroscopy; Interfaces; Ion beam irradiation; Titanium oxide

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