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

A.J. Ward; A. Ruseckas; M.M. Kareem; B. Ebenhoch; L.A. Serrano; M. Al-Eid; B. Fitzpatrick; V.M. Rotello; G. Cooke; I.D.W. Samuel

doi:10.1002/adma.201405623

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

A.J. Ward, A. Ruseckas, M.M. Kareem, B. Ebenhoch, L.A. Serrano, M. Al-Eid, B. Fitzpatrick, V.M. Rotello, G. Cooke, I.D.W. Samuel

Research output: Contribution to journal › Article › peer-review

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 <2 ps is observed for driving force between 0.2 and 0.6 eV and slower electron transfer outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.

Original language	English
Pages (from-to)	2496–2500
Journal	Advanced Materials
Volume	27
Issue number	15
Early online date	10 Mar 2015
DOIs	https://doi.org/10.1002/adma.201405623
Publication status	Published - 17 Apr 2015

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Charge generation
Excitonic solar cells
Reorganization energy
PTB7

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10.1002/adma.201405623

Ward_2015_AM_Impact_CC
© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 0.98 MBLicence: CC BY

Cite this

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title = "The impact of driving force on electron transfer rates in photovoltaic donor-acceptor blends",

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 <2 ps is observed for driving force between 0.2 and 0.6 eV and slower electron transfer outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV. ",

keywords = "Charge generation, Excitonic solar cells, Reorganization energy, PTB7",

author = "A.J. Ward and A. Ruseckas and M.M. Kareem and B. Ebenhoch and L.A. Serrano and M. Al-Eid and B. Fitzpatrick and V.M. Rotello and G. Cooke and I.D.W. Samuel",

note = "This work was funded by Engineering and Physical Sciences Research Council of the UK (grants EP/I00243X and EP/J009016) and the European Research Council of the European Union (grant 321305). I.D.W.S. also acknowledges support from a Royal Society Wolfson Research Merit Award. AJW acknowledges the Scottish Doctoral Training Centre in Condensed Matter Physics for financial support.",

year = "2015",

month = apr,

day = "17",

doi = "10.1002/adma.201405623",

language = "English",

volume = "27",

pages = "2496–2500",

journal = "Advanced Materials",

issn = "0935-9648",

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T1 - The impact of driving force on electron transfer rates in photovoltaic donor-acceptor blends

AU - Ward, A.J.

AU - Ruseckas, A.

AU - Kareem, M.M.

AU - Ebenhoch, B.

AU - Serrano, L.A.

AU - Al-Eid, M.

AU - Fitzpatrick, B.

AU - Rotello, V.M.

AU - Cooke, G.

AU - Samuel, I.D.W.

N1 - This work was funded by Engineering and Physical Sciences Research Council of the UK (grants EP/I00243X and EP/J009016) and the European Research Council of the European Union (grant 321305). I.D.W.S. also acknowledges support from a Royal Society Wolfson Research Merit Award. AJW acknowledges the Scottish Doctoral Training Centre in Condensed Matter Physics for financial support.

PY - 2015/4/17

Y1 - 2015/4/17

N2 - 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 <2 ps is observed for driving force between 0.2 and 0.6 eV and slower electron transfer outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.

AB - 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 <2 ps is observed for driving force between 0.2 and 0.6 eV and slower electron transfer outside this range. This dependence is described by Marcus theory with a reorganization energy of ≈0.4 eV.

KW - Charge generation

KW - Excitonic solar cells

KW - Reorganization energy

KW - PTB7

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DO - 10.1002/adma.201405623

M3 - Article

SN - 0935-9648

VL - 27

SP - 2496

EP - 2500

JO - Advanced Materials

JF - Advanced Materials

IS - 15

ER -

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

Abstract

UN SDGs

Keywords

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ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON

Synergistic tailoring of flavins: Synergistic tailoring of flavins and quantum dots for solar cell applications

Ifor Samuel

Cite this

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

Abstract

UN SDGs

Keywords

Access to Document

Other files and links

Fingerprint

Projects

ERC Advanced Grant EXCITON: EU FP7 ERC Advanced Grant 2012 EXCITON

Synergistic tailoring of flavins: Synergistic tailoring of flavins and quantum dots for solar cell applications

Profiles

Ifor Samuel

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