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Aaronson BD, Garoz-Ruiz J, Byers JC, et al. Electrodeposition and Screening of Photoelectrochemical Activity in Conjugated Polymers Using Scanning Electrochemical Cell Microscopy. Langmuir. 2015;31(46):12814-22doi: 10.1021/acs.langmuir.5b03316.
Aaronson, B. D., Garoz-Ruiz, J., Byers, J. C., Colina, A., & Unwin, P. R. (2015). Electrodeposition and Screening of Photoelectrochemical Activity in Conjugated Polymers Using Scanning Electrochemical Cell Microscopy. Langmuir : the ACS journal of surfaces and colloids, 31(46), 12814-22. https://doi.org/10.1021/acs.langmuir.5b03316
Aaronson, Barak D B, et al. "Electrodeposition and Screening of Photoelectrochemical Activity in Conjugated Polymers Using Scanning Electrochemical Cell Microscopy." Langmuir : the ACS journal of surfaces and colloids vol. 31,46 (2015): 12814-22. doi: https://doi.org/10.1021/acs.langmuir.5b03316
Aaronson BD, Garoz-Ruiz J, Byers JC, Colina A, Unwin PR. Electrodeposition and Screening of Photoelectrochemical Activity in Conjugated Polymers Using Scanning Electrochemical Cell Microscopy. Langmuir. 2015 Nov 24;31(46):12814-22. doi: 10.1021/acs.langmuir.5b03316. Epub 2015 Nov 10. PMID: 26502089.
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Langmuir. 2015 Nov 24;31(46):12814-22. doi: 10.1021/acs.langmuir.5b03316. Epub 2015 Nov 10.

Electrodeposition and Screening of Photoelectrochemical Activity in Conjugated Polymers Using Scanning Electrochemical Cell Microscopy.

Langmuir : the ACS journal of surfaces and colloids

Barak D B Aaronson, Jesus Garoz-Ruiz, Joshua C Byers, Alvaro Colina, Patrick R Unwin

Affiliations

  1. Department of Chemistry, University of Warwick , Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom.
  2. Department of Chemistry, Universidad de Burgos , Pza. Misael Bañuelos s/n, E-09001 Burgos, Spain.

PMID: 26502089 DOI: 10.1021/acs.langmuir.5b03316

Abstract

A number of renewable energy systems require an understanding and correlation of material properties and photoelectrochemical activity on the micro to nanoscale. Among these, conducting polymer electrodes continue to be important materials. In this contribution, an ultrasensitive scanning electrochemical cell microscopy (SECCM) platform is used to electrodeposit microscale thin films of poly(3-hexylthiophene) (P3HT) on an optically transparent gold electrode and to correlate the morphology (film thickness and structural order) with photoactivity. The electrochemical growth of P3HT begins with a thin ordered film up to 10 nm thick, after which a second more disordered film is deposited, as revealed by micro-Raman spectroscopy. A decrease in photoactivity for the thicker films, measured in situ immediately following film deposition, is attributed to an increase in bulk film disorder that limits charge transport. Higher resolution ex situ SECCM phototransient measurements, using a smaller diameter probe, show local variations in photoactivity within a given deposit. Even after aging, thinner, more ordered regions within a deposit exhibit sustained enhanced photocurrent densities compared to areas where the film is thicker and more disordered. The platform opens up new possibilities for high-throughput combinatorial correlation studies, by allowing materials fabrication and high spatial resolution probing of processes in photoelectrochemical materials.

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