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

Kanciurzewska, AnnaLinköpings universitet,Tekniska högskolan,Institutionen för teknik och naturvetenskap (author)

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 I/I-3 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 I-3, I-2 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 I-3 to I in the redox electrolyte and has caused worse cell performance than in case of DSSC with Pt counter electrode.

Dobruchowska, E. (author)
Baranzahi, AmirLinköpings universitet,Tekniska högskolan,Institutionen för teknik och naturvetenskap(Swepub:liu)amiba25 (author)
Carlegrim, ElinLinköpings universitet,Tekniska högskolan,Institutionen för teknik och naturvetenskap(Swepub:liu)elica79 (author)
Fahlman, MatsLinköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi(Swepub:liu)matfa21 (author)
Girtu, M. A. (author)
Linköpings universitetTekniska högskolan (creator_code:org_t)

In:Journal of Optoelectronics and Advanced Materials9:4, s. 1052-10591454-41641841-7132

By the author/editor: Kanciurzewska, A ...; Dobruchowska, E.; Baranzahi, Amir; Carlegrim, Elin; Fahlman, Mats; Girtu, M. A.

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