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Title:
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Long-term stability of nanocrystalline dye-sensitized solar cells
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Author(s):
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Rijnberg, E.; Kroon, J.M.; Wienke, J.A.; Hinsch, A.; Roosmalen, J.A.M. van; Sinke, W.C.; Scholtens, B.J.R.; Vries, J.G. de; Koster, C.G. de; Duchateau, A.L.L.; Maes, I.C.H.; Henderickx, H.J.W.
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Published by:
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Publication date:
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ECN
Solar Energy
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1998
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ECN report number:
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Document type:
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ECN-RX--98-033
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Article (scientific)
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Number of pages:
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8
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Published in: Paper, presented at the 2nd World conference and exhibition on photovoltaic solar energy conversion, Vienna, Austria, 06-10 July (), , , Vol., p.-.
Abstract:
Experiments are described in which the long term stability ofdye-sensitized nanocrystalline TiO2 solar cells (nc-DSC) has been tested
under different conditions. Artificial tests are performed via aging of
sealed devices by means of continuous illumination under 3/4 sun conditions
and accelerated conditions (2.5-3 sun). An outdoor test facility is used to
monitor the performance of sealed cells daily under natural sunlight. The
influence of some potential contaminants (water, ethanol) on the stability of
nc-DSC, consisting of commercial P25-TiO2, an electrolyte methoxypropionitril
solution and a polymeric (Surlyn"R) sealant, was investigated. The data
suggest that base-additives, e.g. 4-tert-butylpyridine, not only result in
higher values of Voc and Maximum Power Point, by suppressing the unwanted
dark reaction, but protect the cells somehow from the destructive effect of
water up to volume fractions of 5%. High Pressure Liquid Chromatography
(HPLC) is used to analyze the cell contents of aged cells. 4 refs.
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