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Low-temperature fabrication of dye-sensitized solar cells by transfer of composite porous layers

Nature Materials volume 4, pages 607611 (2005) | Download Citation

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Abstract

Dye-sensitized solar cells have established themselves as a potential low-cost alternative to conventional solar cells owing to their remarkably high power-conversion efficiency combined with ‘low-tech’ fabrication processes1,2. As a further advantage, the active layers consisting of nanoporous TiO2 are only some tens of micrometres thick and are therefore in principle suited for flexible applications. However, typical flexible plastic substrates cannot withstand the process temperatures of up to 500 C commonly used for sintering the TiO2 nanoparticles together. Even though some promising routes for low-temperature sintering have been proposed3,4,5,6,7,8,9, those layers cannot compete as regards electrical properties with layers obtained with the standard high-temperature process. Here we show that by a lift-off technique, presintered porous layers can be transferred to an arbitrary second substrate, and the original electrical properties of the transferred porous layers are maintained. The transfer process is greatly assisted by the application of composite layers comprising nanoparticles and nanorods.

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Acknowledgements

The authors would like to thank K. Noda, Y. Suzuki and M. Morooka for discussions and A. Roberts for proofreading the manuscript.

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Affiliations

  1. Materials Science Laboratory, Sony Deutschland GmbH, 70327 Stuttgart, Germany

    • Michael Dürr
    • , Andreas Schmid
    • , Markus Obermaier
    • , Silvia Rosselli
    • , Akio Yasuda
    •  & Gabriele Nelles

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Competing interests

The authors declare no competing financial interests.

Corresponding authors

Correspondence to Michael Dürr or Gabriele Nelles.

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https://doi.org/10.1038/nmat1433

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