Electrochemical reaction rates in a dye sentisised solar cell - the iodide/tri-iodide redox system

Lasse Bay, Keld West, Bjørn Winter-Jensen, Torben Jacobsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The electrochemical reaction rate of the redox couple iodide / tri-iodide in acetonitrile is characterised by impedance spectroscopy. Different electrode materials relevant for the function of dye-sensitised solar cells (DSSC) are investigated. Preferably, the reaction with the iodide / tri-iodide couple should be fast at the counter electrode, i.e. this electrode must have a high catalytic activity towards the redox couple, and the same reaction must be slow on the photo electrode. The catalytic activity is investigated for platinum, poly(3,4-ethylenedioxythiophene) (PEDOT), polypyrrole (PPy), and polyaniline (PANI) - all deposited onto fluorine doped tin oxide (FTO) glass. Both Pt and PEDOT are found to have sufficiently high catalytic activities for practical use as counter electrode in DSSC. The reaction resistance on FTO and anatase confirmed the beneficial effect of a compact anatase layer on top of the FTO glass to lower the tri-iodide reduction rate.
Original languageEnglish
JournalSolar Energy & Solar Cells
Volume90
Pages (from-to)341-351
Publication statusPublished - 2006

Fingerprint Dive into the research topics of 'Electrochemical reaction rates in a dye sentisised solar cell - the iodide/tri-iodide redox system'. Together they form a unique fingerprint.

Cite this