Dye sensitized solar cells with a plastic counter electrode of poly(3,4-ethylene dioxythiophene)-poly(styrenesulfonate)

Anna Kanciurzewska; Ewa Dobruchowska; Amir Baranzahi; Elin Carlegrim; Ana Fahlman; Mats Fahlman; Mihai A. Gîrţu

doi:10.1117/12.735830

12 November 2007 Dye sensitized solar cells with a plastic counter electrode of poly(3,4-ethylene dioxythiophene)-poly(styrenesulfonate)

Anna Kanciurzewska, Ewa Dobruchowska, Amir Baranzahi, Elin Carlegrim, Ana Fahlman, Mats Fahlman, Mihai A. Gîrţu

Author Affiliations +

Proceedings Volume 6656, Organic Photovoltaics VIII; 665611 (2007) https://doi.org/10.1117/12.735830
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

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.

Citation Download Citation

Anna Kanciurzewska, Ewa Dobruchowska, Amir Baranzahi, Elin Carlegrim, Ana Fahlman, Mats Fahlman, and Mihai A. Gîrţu "Dye sensitized solar cells with a plastic counter electrode of poly(3,4-ethylene dioxythiophene)-poly(styrenesulfonate)", Proc. SPIE 6656, Organic Photovoltaics VIII, 665611 (12 November 2007); https://doi.org/10.1117/12.735830

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