The impact of driving force on electron transfer rates in photovoltaic donor-acceptor blends

Ward, A. J., Ruseckas, A., Kareem, M. M., Ebenhoch, B., Serrano, L. A., Al-Eid, M., Fitzpatrick, B., Rotello, V. M., Cooke, G. and Samuel, I. D.W. (2015) The impact of driving force on electron transfer rates in photovoltaic donor-acceptor blends. Advanced Materials, 27(15), pp. 2496-2500. (doi:10.1002/adma.201405623) (PMID:25759321)

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Abstract

The effect of acceptor energy level on electron transfer rate in blends of the polymer solar-cell material poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl]] (PTB7) is studied using time-resolved fluorescence. Fast electron transfer in less than 2 ps is observed for a driving force between 0.2 and 0.6 eV and the electron transfer is slower outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cooke, Professor Graeme and Fitzpatrick, Dr Brian
Authors: Ward, A. J., Ruseckas, A., Kareem, M. M., Ebenhoch, B., Serrano, L. A., Al-Eid, M., Fitzpatrick, B., Rotello, V. M., Cooke, G., and Samuel, I. D.W.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Advanced Materials
Publisher:Wiley
ISSN:0935-9648
ISSN (Online):1521-4095
Published Online:10 March 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Advanced Materials 27(15): 2496-2500
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
540171Synergistic Tailoring of Flavins and Quantum Dots for Solar Cell applicationsGraeme CookeEngineering & Physical Sciences Research Council (EPSRC)EP/I00243X/1CHEM - CHEMISTRY