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Counterion effects in cyanine heterojunction photovoltaic devices

  • Photovoltaic Materials and Phenomena Scell-2004
  • Published:
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Abstract

We investigated cyanine heterojunction photovoltaic devices using carbocyanine dyes as donors and buckminsterfullerene (C60) as acceptor. In particular, we focused on the influence of cyanine counterions on the photovoltaic device characteristics. It was found that counterions can be displaced in the applied electric field and give rise to important hystereses in the current-voltage characteristics, which are related to charge injection processes at electrode and organic heterointerfaces. Mobile counterions have also a drastic effect on the photocurrent spectrum and are responsible for an important C60 contribution at the organic heterojunction between cyanine and C60. If the counterion is covalently linked to the cyanine dye, the C60 contribution in the blue spectral domain can not be observed.

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Authors and Affiliations

  1. EMPA, Materials Science and Technology, Überlandstrasse 129, CH-8600, Dübendorf, Switzerland

    F. Nüesch

  2. Laboratoire d’optoélectronique des matériaux moléculaires, Institut des matériaux, EPFL, CH-1015, Lausanne, Switzerland

    F. Nüesch

  3. Laboratoire d’optoélectronique des matériaux moléculaires, Institut des matériaux, EPFL, CH-1015, Lausanne, Switzerland

    A. Faes & L. Zuppiroli

  4. Institute of Fine Chemicals, East China University of Science & Technology, Shanghai, 200237, People’s Republic of China

    Fanshun Meng, Kongchang Chen & He Tian

Authors
  1. F. Nüesch
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  2. A. Faes
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  3. L. Zuppiroli
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  4. Fanshun Meng
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  5. Kongchang Chen
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  6. He Tian
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Correspondence to F. Nüesch.

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Nüesch, F., Faes, A., Zuppiroli, L. et al. Counterion effects in cyanine heterojunction photovoltaic devices. J Mater Sci 40, 1353–1357 (2005). https://doi.org/10.1007/s10853-005-0564-4

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  • DOI: https://doi.org/10.1007/s10853-005-0564-4

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