Polymer electrolyte photoelectrochemical cells with involatile plasticizers: I. The n-Si/I-/I2 cell

S. Özer, J. Javorniczky, C. A. Angell

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

We report results for a photoelectrochemical (PEC) cell based on n-Si-Pt/plasticized polymer electrolyte (with dissolved iodine/ iodide redox couple). All elements except the electrolyte are kept the same as in earlier cells with bare (and platinized) silicon but "dry" polymer electrolyte, in order to separate out the electrolyte plasticization effect. The study is a precursor to a detailed study of novel electrolyte-containing PECs to be reported in a separate article. In the present study, the plasticizer is tetramethylene sulfone, and its incorporation is shown to increase the short circuit current by a factor of 44. Changes in iodide concentration produce an additional improvement. Effects of light intensity on photovoltage and photocurrent are reported. Short circuit photocurrents as high as 7 mA/cm2 (vs. 17 mA/cm2 with more appropriate redox couples) can be reached at 1 sun incident light intensity, without recourse to special coatings on the silicon photoanode. Factors affecting the efficiency of energy conversion are discussed.

Original languageEnglish (US)
Pages (from-to)A87-A92
JournalJournal of the Electrochemical Society
Volume149
Issue number2
DOIs
StatePublished - Feb 1 2002
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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