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

Kerttu Aitola, Antti Kaskela, Janne Halme, Virginia Ruiz, Albert G. Nasibulin, Esko I. Kauppinen, Peter D. Lund

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

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 89 cm2 and 60 /, respectively, making them suitable for low-intensity DSC applications. A solar cell efficiency of 2.5% was reached at an illumination of 8 mW/ 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
Volume157
Issue number12
DOIs
Publication statusPublished - 2010
Externally publishedYes

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