Charge transport properties in dye-sensitized nanostructured TiO2 thin film electrodes studied by photoinduced current transients

The charge transport in dye-sensitized nanostructured TiO2 was studied by laser pulse induced photocurrent transients. The exptl. curves were compared to simulations using a diffusion model with an initial electron distribution of an exponential decay. The simulations were optimized with respect to the exptl. curves giving an apparent diffusion coeff. of 6 × 10-6 cm2/s for the electrons with an electrolyte of 0.1M KI in propylene carbonate, the potential being +300 mV vs. Ag/AgCl in EtOH. The charge transport was highly dependent on electrolyte compn. and light intensity.


Published in:
Journal of Physical Chemistry B, 103, 1078-1083
Year:
1999
ISSN:
1089-5647
Keywords:
Laboratories:




 Record created 2015-07-06, last modified 2018-03-17


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