Solvent dependence of lateral charge transfer in a porphyrin monolayer

Bradley J. Brennan, Kevin P. Regan, Alec C. Durrell, Charles A. Schmuttenmaer, Gary W. Brudvig

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10 Citations (Scopus)

Abstract

Lateral charge transport in a redox-active monolayer can be utilized for solar energy harvesting. A model porphyrin system was chosen to study the influence of the solvent on lateral hole hopping, which plays a crucial role in the charge-transfer kinetics. We examined the influence of water, acetonitrile, and propylene carbonate as solvents. Hole-hopping lifetimes varied by nearly 3 orders of magnitude among solvents, ranging from 3 ns in water to 2800 ns in propylene carbonate, and increased nonlinearly as a function of added acetonitrile in aqueous solvent mixtures. These results elucidate the important roles of solvation, molecular packing dynamics, and lateral charge-transfer mechanisms that have implications for all dye-sensitized photoelectrochemical device designs.

Original languageEnglish
Pages (from-to)168-173
Number of pages6
JournalACS Energy Letters
Volume2
Issue number1
DOIs
Publication statusPublished - Jan 13 2017

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ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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