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Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell

Ching-Hong Tan, Andrew Wadsworth, Nicola Gasparini, Scot Wheeler, Sarah Holliday, Raja S. Ashraf, Stoichko Dimitrov Orcid Logo, Derya Baran, Iain McCulloch, James Durrant Orcid Logo

The Journal of Physical Chemistry C, Volume: 123, Issue: 10, Pages: 5826 - 5832

Swansea University Authors: Stoichko Dimitrov Orcid Logo, James Durrant Orcid Logo

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DOI (Published version): 10.1021/acs.jpcc.8b10918

Abstract

Solar cells based on blends of the donor polymer, P3HT, with the nonfullerene acceptor, O-IDTBR, have been shown to exhibit promising efficiencies and stabilities for low-cost organic photovoltaic devices. We focus herein on the charge separation and recombination dynamics in such devices. By employ...

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Published in: The Journal of Physical Chemistry C
ISSN: 1932-7447 1932-7455
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa49814
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first_indexed 2019-04-02T10:19:30Z
last_indexed 2019-04-02T10:19:30Z
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spelling 2019-03-29T14:19:27.8371362 v2 49814 2019-03-29 Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2019-03-29 EEN Solar cells based on blends of the donor polymer, P3HT, with the nonfullerene acceptor, O-IDTBR, have been shown to exhibit promising efficiencies and stabilities for low-cost organic photovoltaic devices. We focus herein on the charge separation and recombination dynamics in such devices. By employing selective wavelength excitations of P3HT and O-IDTBR, we show that photoexcitation of P3HT results in lower internal quantum efficiency (IQE) for photocurrent generation than that observed for photoexcitation of O-IDTBR. Transient absorption and photoluminescence quenching studies indicate that this lower IQE results primarily from higher geminate recombination losses of photogenerated charges following P3HT excitation compared with O-IDTBR excitation, rather than from differences in exciton separation efficiency. These higher geminate recombination losses result in lower photocurrent generation efficiency at short circuit upon selective excitation of the P3HT donor, when compared with O-IDTBR excitation. Journal Article The Journal of Physical Chemistry C 123 10 5826 5832 1932-7447 1932-7455 31 12 2019 2019-12-31 10.1021/acs.jpcc.8b10918 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2019-03-29T14:19:27.8371362 2019-03-29T14:18:35.9376155 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering Ching-Hong Tan 1 Andrew Wadsworth 2 Nicola Gasparini 3 Scot Wheeler 4 Sarah Holliday 5 Raja S. Ashraf 6 Stoichko Dimitrov 0000-0002-1564-7080 7 Derya Baran 8 Iain McCulloch 9 James Durrant 0000-0001-8353-7345 10
title Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
spellingShingle Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
Stoichko Dimitrov
James Durrant
title_short Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
title_full Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
title_fullStr Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
title_full_unstemmed Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
title_sort Excitation Wavelength-Dependent Internal Quantum Efficiencies in a P3HT/Nonfullerene Acceptor Solar Cell
author_id_str_mv 9fc26ec1b8655cd0d66f7196a924fe14
f3dd64bc260e5c07adfa916c27dbd58a
author_id_fullname_str_mv 9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant
author Stoichko Dimitrov
James Durrant
author2 Ching-Hong Tan
Andrew Wadsworth
Nicola Gasparini
Scot Wheeler
Sarah Holliday
Raja S. Ashraf
Stoichko Dimitrov
Derya Baran
Iain McCulloch
James Durrant
format Journal article
container_title The Journal of Physical Chemistry C
container_volume 123
container_issue 10
container_start_page 5826
publishDate 2019
institution Swansea University
issn 1932-7447
1932-7455
doi_str_mv 10.1021/acs.jpcc.8b10918
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 0
active_str 0
description Solar cells based on blends of the donor polymer, P3HT, with the nonfullerene acceptor, O-IDTBR, have been shown to exhibit promising efficiencies and stabilities for low-cost organic photovoltaic devices. We focus herein on the charge separation and recombination dynamics in such devices. By employing selective wavelength excitations of P3HT and O-IDTBR, we show that photoexcitation of P3HT results in lower internal quantum efficiency (IQE) for photocurrent generation than that observed for photoexcitation of O-IDTBR. Transient absorption and photoluminescence quenching studies indicate that this lower IQE results primarily from higher geminate recombination losses of photogenerated charges following P3HT excitation compared with O-IDTBR excitation, rather than from differences in exciton separation efficiency. These higher geminate recombination losses result in lower photocurrent generation efficiency at short circuit upon selective excitation of the P3HT donor, when compared with O-IDTBR excitation.
published_date 2019-12-31T04:01:03Z
_version_ 1763753132751323136
score 11.013731

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