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Title:
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Comparison of charge accumulation and transport in nanostructured dye-sensitized solar cells with electrolyte or CuSCN as hole-conductor
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Author(s):
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Lenzmann, F.O.; Mahrov, B.; Hagfeldt, A.; Boschloo, G.
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Published by:
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Publication date:
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ECN
Solar Energy
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1-7-2005
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ECN report number:
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Document type:
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ECN-RX--05-038
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Article (scientific)
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Number of pages:
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12
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Published in: Solar Energy Materials & Solar Cells (Elsevier), , 2005, Vol.88, p.351-362.
Abstract:
The charge transport properties of the dye-sensitized solar cells consistingof Ru(dcbpyH2)2(NCS)2-sensitized nanostructured TiO2 with either redox
electrolyte or CuSCN as hole conductor have been compared. The electron
transport time and the electron charge in the TiO2 varies in a similar
way with the incident light intensity for both hole conductors:
electron transport becomes faster and electron accumulation increases
with increasing light intensity. Electron transport in the CuSCN-based
cells is significantly faster than in electrolyte cells under
conditions where the accumulated charge is equal. An ultra-thin aluminum
oxide layer on the nanocrystalline titanium oxide has a beneficial
effect as it reduces the
recombination and increases the open-circuit potential.
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