Solvent Dependence of Lateral Charge Transfer in a Porphyrin Monolayer
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 three 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.
Additional Information
© 2016 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. Received: November 6, 2016; Accepted: December 19, 2016; Published: December 19, 2016. We heartily thank Rudy Marcus, Jay Winkler, and Harry Gray at Caltech for their fruitful discussions of the intricacies of electron transfer in complex systems. We would also like to thank Gerald Meyer at the University of North Carolina – Chapel Hill for his helpful insights into our hole-hopping model. This work has been funded by the U.S. Department of Energy Office of Science, Office of Basic Energy Sciences, under award no. DE-FG02-07ER15909 and by a generous donation from the TomKat Charitable Trust.Attached Files
Published - acsenergylett.6b00583.pdf
Supplemental Material - nz6b00583_si_001.pdf
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Additional details
- Eprint ID
- 72956
- DOI
- 10.1021/acsenergylett.6b00583
- Resolver ID
- CaltechAUTHORS:20161220-073625671
- DE-FG02-07ER15909
- Department of Energy (DOE)
- TomKat Charitable Trust
- Created
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2016-12-20Created from EPrint's datestamp field
- Updated
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2021-11-11Created from EPrint's last_modified field