Study on Poly(3,4-ethylene dioxythiophene)- Poly(styrenesulfonate) as a plastic counter electrode in dye sensitized solar cells

Dye sensitized solar cells with PEDOT-PSS coated directly on flexible polyester substrate as counter electrode have been fabricated. The behavior of such plastic counter electrode in the presence of 1 /13 redox electrolyte has been investigated with X-ray photoelectron spectroscopy. We have found th...

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Published in:Journal of Optoelectronics and Advanced Materials 2007-04, Vol.9 (4), p.1052-1059
Main Authors: Kanciurzewska, A, Dobruchowska, E, Baranzahi, A, Carlegrim, E, Fahlman, M, Girtu, M A
Format: Article
Language:English
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dye-sensitized solar cells
PEDOT-PSS
photoelectron spectroscopy
plastic counter electrode
TECHNOLOGY
TEKNIKVETENSKAP
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container_title Journal of Optoelectronics and Advanced Materials
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creator Kanciurzewska, A
Dobruchowska, E
Baranzahi, A
Carlegrim, E
Fahlman, M
Girtu, M A
description Dye sensitized solar cells with PEDOT-PSS coated directly on flexible polyester substrate as counter electrode have been fabricated. The behavior of such plastic counter electrode in the presence of 1 /13 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 13 , 12 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 overoxidation and loss of conductivity in the PEDOT-PSS film. Additionally, the interactions between PEDOT and iodine species may be enlarged because of the partial loss of PSS protective counter ion. That has resulted in decrease of PEDOT-PSS catalytic activity for reduction of 13 to I in the redox electrolyte and has caused worse cell performance than in case of DSSC with Pt counter electrode.
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subjects dye-sensitized solar cells
PEDOT-PSS
photoelectron spectroscopy
plastic counter electrode
TECHNOLOGY
TEKNIKVETENSKAP
title Study on Poly(3,4-ethylene dioxythiophene)- Poly(styrenesulfonate) as a plastic counter electrode in dye sensitized solar cells
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