Solvent effect in photo-ionic cells

Elena Vladimirova, Pekka Peljo*, Hubert H. Girault

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Photo-ionic cells convert solar energy into redox fuels. Unlike in photovoltaic devices where the photo-induced charge transfer reactions occur at an electrode, the photoreaction takes place in one bulk solution of a biphasic liquid-liquid system, and the charge separation is realised by the transfer of one of the photoproducts into the adjacent phase to avoid recombination. After separation of the two phases, the redox fuels can be stored and then converted to electricity on demand with a biphasic fuel cell. Here, we compared the effect of the two organic solvents, 1,2-dichloroethane and propylene carbonate, on the performance of the photo-ionic cell. By replacing 1,2-dichloroethane, the maximum cell voltage was increased to 0.6 V. Additionally, propylene carbonate helps to reduce aggregation of dyes and it shows faster kinetics for the photoreaction.

Original languageEnglish
Pages (from-to)242-252
Number of pages11
JournalJournal of Electroanalytical Chemistry
Volume816
DOIs
Publication statusPublished - 1 May 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Biphasic flow battery
  • Ion transfer
  • Liquid-liquid interfaces
  • Photo-ionic cells
  • Solar energy conversion

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