Recombination and Transport Processes in Dye-Sensitized Solar Cells Investigated under Working Conditions
2006 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 110, no 36, 17715-17718 p.Article in journal (Refereed) Published
The transport and recombination of electrons in dye-sensitized TiO2 solar cells were studied by analysis of the current and voltage response to a small square-wave light-intensity modulation. Solar cells were studied under working conditions by using potentiostatic and galvanostatic conditions. An increase in applied voltage, that is, from 0 V toward open-circuit voltage, was found to lead to faster electron transport at low light intensities, while it slowed transport at higher light intensities. This observation seems to be conflicting with the multiple trapping model with diffusive transport. An effective diffusion length at the maximum power point was calculated, and it was shown that it decreases with increasing light intensity.
Place, publisher, year, edition, pages
2006. Vol. 110, no 36, 17715-17718 p.
Dye-sensitized solar cells; Open-circuit voltage; Square-wave light-intensity modulation
IdentifiersURN: urn:nbn:se:kth:diva-7312DOI: 10.1021/jp064046bISI: 000240340600005ScopusID: 2-s2.0-33749677248OAI: oai:DiVA.org:kth-7312DiVA: diva2:12284
QC 201007082007-06-072007-06-072010-07-09Bibliographically approved