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A High-Efficiency Panchromatic Squaraine Sensitizer for Dye-Sensitized Solar Cells

Authors

  • Yanrong Shi,

    1. Department of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400 (USA), Fax: (+1) 404-894-5909
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  • Rebecca B. M. Hill,

    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
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  • Dr. Jun-Ho Yum,

    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
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  • Amalie Dualeh,

    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
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  • Dr. Stephen Barlow,

    1. Department of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400 (USA), Fax: (+1) 404-894-5909
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  • Prof. Michael Grätzel,

    Corresponding author
    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
    • Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
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  • Prof. Seth R. Marder,

    Corresponding author
    1. Department of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400 (USA), Fax: (+1) 404-894-5909
    • Department of Chemistry and Biochemistry and Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia, 30332-0400 (USA), Fax: (+1) 404-894-5909
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  • Dr. Mohammad K. Nazeeruddin

    Corresponding author
    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
    • Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, CH-1015 Lausanne (Switzerland), Fax: (+41) 21-693-4111
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  • This work was financially supported by the ORION EU project (229036), the AFOSR through the BIONIC program (FA9550-09-1-0162), by the ONR (N00014-10-1-0392), and the NSF through the STC program (DMR 0120967).

Abstract

original image

Squarely efficient: A squaraine sensitizer (see picture) shows an outstanding power conversion efficiency of 6.74 % in liquid dye-sensitized solar cells and 2.69 % in solid-state dye-sensitized solar cells. The high efficiencies are related to both the bathochromic shift of the absorption maximum compared to other squaraine sensitizers, and to the presence of additional absorptions that lead to high absorptivity over much of the visible spectrum.

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