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Proceedings Paper

Dye sensitized solar cells with a plastic counter electrode of poly(3,4-ethylene dioxythiophene)-poly(styrenesulfonate)
Author(s): Anna Kanciurzewska; Ewa Dobruchowska; Amir Baranzahi; Elin Carlegrim; Ana Fahlman; Mats Fahlman; Mihai A. Gîrţu
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Paper Abstract

We report on dye sensitized solar cells with PEDOT-PSS coated directly on flexible polyester substrate as counter electrode. The behavior of such plastic counter electrode in the presence of I - /I3 redox electrolyte has been investigated with X-ray photoelectron spectroscopy. We have found that some of iodine species are "trapped" within the PEDOT-PSS layer. The presence of I3 - , I2 and PEDOT charge transfer complexes with iodine species may block the surface of the electrode. Furthermore, the PEDOT may be further oxidized (p-doped) during cell operation, which in turn may cause over oxidation and loss of conductivity in the PEDOT-PSS film. The interactions between PEDOT and iodine species may be enlarged because of the partial loss of PSS protective counter ion. The result is a decrease of PEDOT-PSS catalytic activity for reduction of I3 - to I - in the redox electrolyte and worse cell performance than in the case of DSSC with Pt counter electrode.

Paper Details

Date Published: 12 November 2007
PDF: 8 pages
Proc. SPIE 6656, Organic Photovoltaics VIII, 665611 (12 November 2007); doi: 10.1117/12.735830
Show Author Affiliations
Anna Kanciurzewska, Linköping Univ. (Sweden)
Ewa Dobruchowska, Linköping Univ. (Sweden)
Technical Univ. of Lodz (Poland)
Amir Baranzahi, Linköping Univ. (Sweden)
Elin Carlegrim, Linköping Univ. (Sweden)
Ana Fahlman, Linköping Univ. (Sweden)
Ovidius Univ. of Constanţa (Romania)
Mats Fahlman, Linköping Univ. (Sweden)
Mihai A. Gîrţu, Ovidius Univ. of Constanţa (Romania)

Published in SPIE Proceedings Vol. 6656:
Organic Photovoltaics VIII
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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