Carboxyethynyl Anchoring Ligands: A Means to Improving the Efficiency of Phthalocyanine-Sensitized Solar Cells

Authors

  • Dr. Maria-Eleni Ragoussi,

    1. Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain)
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  • Dr. Juan-José Cid,

    1. Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain)
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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, 1015 Lausanne (Switzerland)
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  • Dr. Gema de la Torre,

    1. Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain)
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  • Dr. Davide Di Censo,

    1. Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, 1015 Lausanne (Switzerland)
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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, 1015 Lausanne (Switzerland)
    • Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, 1015 Lausanne (Switzerland)
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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, 1015 Lausanne (Switzerland)
    • Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, School of Basic Sciences, Swiss Federal Institute of Technology, 1015 Lausanne (Switzerland)
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  • Prof. Tomás Torres

    Corresponding author
    1. Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain)
    2. IMDEA Nanociencia, Facultad de Ciencias, Cantoblanco, 28049 Madrid (Spain)
    • Universidad Autónoma de Madrid, Departamento de Química Orgánica, Cantoblanco, 28049 Madrid (Spain)
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  • This work has been supported by the Spanish MICINN and MEC (CTQ2011-24187/BQU and CONSOLIDER INGENIO 2010, CSD2007-00010 Nanociencia Molecular, PLE2009-0070), and the Comunidad de Madrid (MADRISOLAR-2, S2009/PPQ/1533). M.K.N. thanks the World Class University program, Photovoltaic Materials, Department of Material Chemistry, Korea University, Chungnam, 339-700, Korea, funded by the Ministry of Education, Science and Technology through the National Research Foundation of Korea (No. R31-2008- 000-10035-0).

Abstract

original image

Bridge the gap: Rigid π-conjugated bridges such as the ethynyl spacers, are effective for connecting the phthalocyanine π system to the conduction band of TiO2. A series of zinc phthalocyanine photosensitizers with carboxyethynyl anchoring groups have been synthesized. Solar cells sensitized with the pictured compound exhibit record efficiencies of 5.5 % and 6.1 % under 100 (1 sun irradiation) and 9.5 mW cm−2, respectively.

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