Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2783477
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Electron transport and recombination time constants in dye-sensitized solar cells made from TiO2 nanowires were determined using transient photocurrent and photovoltage measurements. The magnitude of the electron transport time (10(-2) to 10(-3) s) and its dependence on the illumination intensity were similar to those reported for dye-sensitized solar cells made from TiO2 nanoparticles indicating that electron capture and release by surface traps determine transport times even in nanowires. However, the ratio of the electron recombination time to the electron collection time in nanowire solar cells was similar to 150, larger than those observed in nanoparticle dye-sensitized solar cells. (c) 2007 American Institute of Physics.
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