Low Cost Ferritic Stainless Steel in Dye Sensitized Solar Cells with Cobalt Complex Electrolyte

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© 2014 The Electrochemical Society. This is the post print version of the following article: Miettunen, Kati & Jouttijärvi, Sami & Jiang, Roger & Saukkonen, Tapio & Romu, Jyrki & Halme, Janne & Lund, Peter. 2014. Low Cost Ferritic Stainless Steel in Dye Sensitized Solar Cells with Cobalt Complex Electrolyte. Journal of the Electrochemical Society. Volume 161, Issue 3. H138-H143. ISSN 0013-4651 (printed). DOI: 10.1149/2.054403jes., which has been published in final form at: http://jes.ecsdl.org/content/161/3/H138
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2014
Major/Subject
Mcode
Degree programme
Language
en
Pages
H138-H143
Series
Journal of the Electrochemical Society, Volume 161, Issue 3
Abstract
Cheap ferritic stainless steel is applied here as the counter electrode substrate in dye sensitized solar cells with cobalt complex electrolyte. A 5.0% efficiency was reached with these type of cells which is more than 2.5 times higher compared to previously reported devices with metal counter electrode and cobalt complex electrolyte. The electrochemical impedance spectra analysis showed that the best cells with the ferritic steel counter electrode had as low charge transfer resistance (3.6 Ωcm2) as the reference glass cells with the same electrolyte. While in previous studies many metals have corroded in the cobalt complex electrolyte, the stability analysis including scanning electron microscope imaging of the aged electrodes suggested that the ferritic stainless steel substrates did not corrode in the electrolyte. Hence ferritic stainless steel appears as a possible alternative counter electrode in dye solar cells with cobalt electrolyte in terms of cost, performance and stability.
Description
Keywords
dye solar cell, metal substrate, photovoltaic cell, corrosion
Other note
Citation
Miettunen, Kati & Jouttijärvi, Sami & Jiang, Roger & Saukkonen, Tapio & Romu, Jyrki & Halme, Janne & Lund, Peter. 2014. Low Cost Ferritic Stainless Steel in Dye Sensitized Solar Cells with Cobalt Complex Electrolyte. Journal of the Electrochemical Society. Volume 161, Issue 3. H138-H143. ISSN 0013-4651 (printed). DOI: 10.1149/2.054403jes.