Abstract
Fluorescence and photoelectrochemical studies of chlorophyll a (Chl a) adsorbed on nanocrystalline SnO2 film were carried out. The results of fluorescence and incident photon to current conversion efficiency (IPCE) as a function of applied bias suggest that the fluorescence quenching and the photocarrier generation are interrelated. Fluorescence quenching has thus been utilized to determine the photogeneration efficiency, η(e), of charges in a SnO2/Chl a based photoelectrochemical cell. A value of 0.75 was obtained for η(e) for unbiased cells. With an IPCE of 13%, η(e) of 75%, and a light harvesting efficiency of 70%, the charge collection efficiency of ∼23% was evaluated. These results suggest that the losses due to the charge recombination are a major factor that limit the efficiency of the cells.
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Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 9:52 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 2, 2024, 1:59 p.m.) |
Indexed | 1 year, 6 months ago (Feb. 8, 2024, 1:20 a.m.) |
Issued | 28 years, 10 months ago (Oct. 15, 1996) |
Published | 28 years, 10 months ago (Oct. 15, 1996) |
Published Print | 28 years, 10 months ago (Oct. 15, 1996) |
@article{Bedja_1996, title={Fluorescence and photoelectrochemical behavior of chlorophyll a adsorbed on a nanocrystalline SnO2 film}, volume={80}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.363446}, DOI={10.1063/1.363446}, number={8}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Bedja, Idriss and Kamat, Prashant V. and Hotchandani, Surat}, year={1996}, month=oct, pages={4637–4643} }