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01 December 2008
Effects of the Morphology of the Electrode Nanostructures on the Performance of Dye-Sensitized Solar Cells
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This article reports the performances of dye-sensitized solar cells based on different working electrode structures, namely (1) highly ordered arrays of TiO2 nanorods, (2) highly ordered arrays of TiO2 nanotubules of different wall thicknesses, and (3) sintered TiO2 nanoparticles. Even though highest short-circuit current density was achieved with systems based on TiO2 nanotubules, the most efficient cells were those based on ordered arrays of TiO2 nanorods. This is probably due to the higher open-circuit photovoltage values attained with TiO2 nanorods compared with TiO2 nanotubules. The nanorods are thicker than the nanotubules and therefore the injected electrons, stored in the trap states of the inner TiO2 particles, are shielded from recombination with holes in the redox electrolyte at open-circuit. The high short-circuit photocurrent densities seen in the ordered TiO2 systems can be explained by the fact that, in contrast to the sintered nanoparticles, the parallel and vertical orientation of the ordered nanostructures provide well defined electron percolation paths and thus significantly reduce the diffusion distance and time constant.
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Effects of the Morphology of the Electrode Nanostructures on the Performance of Dye-Sensitized Solar Cells
Abstract
This article reports the performances of dye-sensitized solar cells based on different working electrode structures, namely (1) highly ordered arrays of TiO2 nanorods, (2) highly ordered arrays of TiO2 nanotubules of different wall thicknesses, and (3) sintered TiO2 nanoparticles. Even though highest short-circuit current density was achieved with systems based on TiO2 nanotubules, the most efficient cells were those based on ordered arrays of TiO2 nanorods. This is probably due to the higher open-circuit photovoltage values attained with TiO2 nanorods compared with TiO2 nanotubules. The nanorods are thicker than the nanotubules and therefore the injected electrons, stored in the trap states of the inner TiO2 particles, are shielded from recombination with holes in the redox electrolyte at open-circuit. The high short-circuit photocurrent densities seen in the ordered TiO2 systems can be explained by the fact that, in contrast to the sintered nanoparticles, the parallel and vertical orientation of the ordered nanostructures provide well defined electron percolation paths and thus significantly reduce the diffusion distance and time constant.
References(19)
O'Regan, B.; Grätzel, M. A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films. Nature 1991, 353, 737–740
Grätzel, M. Solar energy conversion by dye-sensitized photovoltaic cells. Inorg. Chem. 2005, 44, 6841–6851
Mor, G. K.; Shankar, K.; Paulose, M.; Varghese, O. K.; Grimes, C. A. Use of highly-ordered TiO2 nanotube arrays in dye-sensitized solar cells. Nano Lett. 2006, 6, 215–218.
Park, N. G.; Schlichthrol, G.; van de Lagemaat, J.; Cheong, H. M.; Mascarenhas, A.; Frank, A. J. Dye-sensitized TiO2 solar cells: Structural and photo-electrochemical characterization of nanocrystalline electrodes formed from hydrolysis of TiCl4. J. Phys. Chem. B 1999, 103, 3308–3314
Grünwald, R.; Trbutsch, H. Mechanisms of instability in Ru-based dye sensitization solar cells. J. Phys. Chem. B 1997, 101, 2564–2575
Kay, A.; Grätzel, M. Low cost photovoltaic modules based on dye sensitized nanocrystalline titanium dioxide and carbon powder. Sol. Energy Mater. Sol. Cells 1996, 44, 99–117
Suzuki, K.; Yamaguchi, M.; Kumagai, M.; Yanagida, S. Application of carbon nanotubes to counter electrodes of dye-sensitized solar cells. Chem. Lett. 2003, 32, 28–29
Oskam, G.; Bergeron, B. V.; Meyer, G. J.; Searson, P. C. Pseudohalogens for dye-sensitized TiO2 photo-electrochemical cells. J. Phys. Chem. B 2001, 105, 6867–6873
Nusbaumer, H.; Moser, J. E; Zakeeruddin, S. M.; Nazeeruddin, M. K.; Grätzel, M. CoII(dbbip)22+ complex rivals tri-iodide/iodide redox mediator in dye-sensitized photovoltaic cells. J. Phys. Chem. B 2001, 105, 10461–10464
Ferrere, S.; Gregg, B. A. Photosensitization of TiO2 by [FeII(2, 2′-bipyridine-4, 4′-dicarboxylic acid)2(CN)2]: Band selective electron injection from ultra-short-lived excited states. J. Am. Chem. Soc. 1998, 120, 843–844
Hou, Y. J.; Xie, P. H.; Zhang, B. W.; Cao, Y.; Xiao, X. R.; Wang, W. B. Influence of the attaching group and substituted position in the photosensitization behavior of ruthenium polypyridyl complexes. Inorg. Chem. 1999, 38, 6320–6322
Kumara, G. R. A.; Kaneko, S.; Okuya, M.; Tennakone, K. Fabrication of dye-sensitized solar cells using triethylamine hydrothiocyanate as a Cul crystal growth inhibitor. Langmuir 2002, 18, 10493–10495
O'Regan, B.; Lenzmann, F.; Muis, R.; Wienke, J. A solid-state dye-sensitized solar cell fabricated with pressure-treated P25-TiO2 and CuSCN: Analysis of pore filling and I–V characteristics. Chem. Mater. 2002, 14, 5023–5029
Nazeeruddin, M. K.; Péchy, P.; Renouard, T.; Zakeeruddin, S. M.; Humphrey-Baker, R.; Comte, P.; Liska, P.; Cevey, L.; Costa, E.; Shklover, V.; Spiccia, L.; Deacon, G. B.; Bignozzi, C. A.; Grätzel, M.; Engineering of efficient panchromatic sensitizers for nanocrystalline TiO2-based solar cells. J. Am. Chem. Soc. 2001, 123, 1613–1624
Hulteen, J. C.; Martin, C. R. A general template-based method for the preparation of nanomaterials. J. Mater. Chem. 1997, 7, 1075–1087
Tenne, R.; Rao, C. N. R. Inorganic nanotubes. Phil. Trans. R. Soc. Lond. A Math. Phys. Eng. Sci. 2004, 362, 2099–2125
Grätzel, M. Conversion of sunlight to electric power by nanocrystalline dye-sensitized solar cells. J. Photochem. Photobiol. A: Chem. 2004, 164, 3–14
Adachi, M.; Murata, Y.; Okada, I.; Yoshikawa, S. Formation of titania nanotubes and applications for dye-sensitized solar cells. J. Electrochem. Soc. 2003, 150, G488–G493
de Jong, P. E.; Vanmaekelbergh, D. Investigation of the electronic transport properties of nanocrystalline particulate TiO2 electrodes by intensity-modulated photocurrent spectroscopy. J. Phys. Chem. B 1997, 101, 2716–2722
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