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Nanomaterials 2016, 6(3), 35; doi:10.3390/nano6030035

Influence of Nitrogen Doping on Device Operation for TiO2-Based Solid-State Dye-Sensitized Solar Cells: Photo-Physics from Materials to Devices

1
IRAMIS/NIMBE/LEDNA, UMR 3685, CEA Saclay, 91191 Gif sur Yvette, France
2
Nanoscience Center, Department of Physics, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
3
Laboratoire de Chimie Physique, UMR8000, Université Paris-Sud, 91405 Orsay, France
4
XLIM UMR 7252, Université de Limoges/CNRS, 87060 Limoges Cedex, France
5
National Institute for Lasers Plasma and Radiation Physics, P.O. Box MG 36, R-077125 Bucharest, Romania
*
Authors to whom correspondence should be addressed.
Academic Editors: Guanying Chen, Zhijun Ning and Hans Agren
Received: 19 December 2015 / Revised: 28 January 2016 / Accepted: 13 February 2016 / Published: 23 February 2016
(This article belongs to the Special Issue Nanostructured Solar Cells)
View Full-Text   |   Download PDF [2760 KB, uploaded 23 February 2016]   |  

Abstract

Solid-state dye-sensitized solar cells (ssDSSC) constitute a major approach to photovoltaic energy conversion with efficiencies over 8% reported thanks to the rational design of efficient porous metal oxide electrodes, organic chromophores, and hole transporters. Among the various strategies used to push the performance ahead, doping of the nanocrystalline titanium dioxide (TiO2) electrode is regularly proposed to extend the photo-activity of the materials into the visible range. However, although various beneficial effects for device performance have been observed in the literature, they remain strongly dependent on the method used for the production of the metal oxide, and the influence of nitrogen atoms on charge kinetics remains unclear. To shed light on this open question, we synthesized a set of N-doped TiO2 nanopowders with various nitrogen contents, and exploited them for the fabrication of ssDSSC. Particularly, we carefully analyzed the localization of the dopants using X-ray photo-electron spectroscopy (XPS) and monitored their influence on the photo-induced charge kinetics probed both at the material and device levels. We demonstrate a strong correlation between the kinetics of photo-induced charge carriers probed both at the level of the nanopowders and at the level of working solar cells, illustrating a direct transposition of the photo-physic properties from materials to devices. View Full-Text
Keywords: solid-state dye-sensitized solar cells; TiO2; nitrogen doping; photo-physics; photo-response; spiro-OMeTAD solid-state dye-sensitized solar cells; TiO2; nitrogen doping; photo-physics; photo-response; spiro-OMeTAD
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, J.; Tapio, K.; Habert, A.; Sorgues, S.; Colbeau-Justin, C.; Ratier, B.; Scarisoreanu, M.; Toppari, J.; Herlin-Boime, N.; Bouclé, J. Influence of Nitrogen Doping on Device Operation for TiO2-Based Solid-State Dye-Sensitized Solar Cells: Photo-Physics from Materials to Devices. Nanomaterials 2016, 6, 35.

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