Single-walled carbon nanotube thin-film counter electrodes for indium tin oxide-free plastic dye solar cells

Kerttu Aitola (Corresponding Author), Antti Kaskela, Janne Halme, Virginia Ruiz, Albert Nasibulin, Esko I. Kauppinen, Peter D. Lund

Research output: Contribution to journalArticleScientificpeer-review

50 Citations (Scopus)


The use of a thin carbon nanotube (CNT) counter electrode (CE) on plastic in a dye solar cell (DSC) is demonstrated as an alternative to expensive indium tin oxide and platinum materials. Optically transparent, single-walled CNT films synthesized by the aerosol CVD method and dry-printed on PET plastic substrates functioned as both the catalyst and conducting layer of the DSC CE. The best charge-transfer resistances and sheet resistances for the random network-type film were around 89Ωcm2 and 60Ω∕□ , respectively, making them suitable for low-intensity DSC applications. A solar cell efficiency of 2.5% was reached at an illumination of 8mW/cm2 . The photocurrent generation of the cells was found to decrease when a non-purified CNT-CE was used. The electrochemical removal of iron catalyst particles from the CNT films reduced the detrimental effect and stabilized the performance of the DSC.
Original languageEnglish
Pages (from-to)B1831-B1837
JournalJournal of the Electrochemical Society
Issue number12
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed


  • aerosols
  • carbon nanotubes
  • catalysis
  • charge exchange
  • chemical vapour deposition
  • dyes
  • electrical resistivity
  • electrochemical electrodes
  • nanofabrication
  • photoconductivity
  • solar cells
  • thin films
  • transparency


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