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Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing

Zhenggang Huang, Elisa Collado Fregoso, Stoichko Dimitrov Orcid Logo, Pabitra Shakya Tuladhar, Ying Woan Soon, Hugo Bronstein, Iain Meager, Weimin Zhang, Iain McCulloch, James R. Durrant

J. Mater. Chem. A, Volume: 2, Issue: 45, Pages: 19282 - 19289

Swansea University Author: Stoichko Dimitrov Orcid Logo

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DOI (Published version): 10.1039/c4ta03589e

Abstract

Poly-thieno[3,2b]thiophene-diketopyrrolopyrrole-co-thiophene (DPP-TT-T) is a promising low bandgap donor polymer for organic solar cells. In this study we employ two different approaches to improve the device efficiency via optimisation of the morphology of the active layer: tuning of the molecular...

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Published in: J. Mater. Chem. A
ISSN: 2050-7488 2050-7496
Published: 2014
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URI: https://cronfa.swan.ac.uk/Record/cronfa31800
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spelling 2017-02-21T12:51:38.7272605 v2 31800 2017-01-27 Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false 2017-01-27 EEN Poly-thieno[3,2b]thiophene-diketopyrrolopyrrole-co-thiophene (DPP-TT-T) is a promising low bandgap donor polymer for organic solar cells. In this study we employ two different approaches to improve the device efficiency via optimisation of the morphology of the active layer: tuning of the molecular weight of the polymer and thermal annealing. In the former case, a higher molecular weight was found to yield a more intermixed morphology, resulting in enhanced exciton dissociation and charge separation, as confirmed by atomic force microscopy, and photoluminescence and transient absorption spectroscopies. In the later case, thermal annealing prior to metal electrode deposition increased the photon conversion efficiency to as high as 6.6%, with this enhanced efficiency being maintained even with prolonged annealing (240 hours at 80 °C). This enhancement in performance with thermal annealing was correlated with increased polymer crystallinity. Journal Article J. Mater. Chem. A 2 45 19282 19289 2050-7488 2050-7496 31 12 2014 2014-12-31 10.1039/c4ta03589e http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000344384000022&amp;KeyUID=WOS:000344384000022 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-02-21T12:51:38.7272605 2017-01-27T13:46:04.9036430 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Zhenggang Huang 1 Elisa Collado Fregoso 2 Stoichko Dimitrov 0000-0002-1564-7080 3 Pabitra Shakya Tuladhar 4 Ying Woan Soon 5 Hugo Bronstein 6 Iain Meager 7 Weimin Zhang 8 Iain McCulloch 9 James R. Durrant 10
title Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
spellingShingle Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
Stoichko Dimitrov
title_short Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
title_full Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
title_fullStr Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
title_full_unstemmed Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
title_sort Optimisation of diketopyrrolopyrrole:fullerene solar cell performance through control of polymer molecular weight and thermal annealing
author_id_str_mv 9fc26ec1b8655cd0d66f7196a924fe14
author_id_fullname_str_mv 9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
author Stoichko Dimitrov
author2 Zhenggang Huang
Elisa Collado Fregoso
Stoichko Dimitrov
Pabitra Shakya Tuladhar
Ying Woan Soon
Hugo Bronstein
Iain Meager
Weimin Zhang
Iain McCulloch
James R. Durrant
format Journal article
container_title J. Mater. Chem. A
container_volume 2
container_issue 45
container_start_page 19282
publishDate 2014
institution Swansea University
issn 2050-7488
2050-7496
doi_str_mv 10.1039/c4ta03589e
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 - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
url http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&amp;SrcAuth=ORCID&amp;SrcApp=OrcidOrg&amp;DestLinkType=FullRecord&amp;DestApp=WOS_CPL&amp;KeyUT=WOS:000344384000022&amp;KeyUID=WOS:000344384000022
document_store_str 0
active_str 0
description Poly-thieno[3,2b]thiophene-diketopyrrolopyrrole-co-thiophene (DPP-TT-T) is a promising low bandgap donor polymer for organic solar cells. In this study we employ two different approaches to improve the device efficiency via optimisation of the morphology of the active layer: tuning of the molecular weight of the polymer and thermal annealing. In the former case, a higher molecular weight was found to yield a more intermixed morphology, resulting in enhanced exciton dissociation and charge separation, as confirmed by atomic force microscopy, and photoluminescence and transient absorption spectroscopies. In the later case, thermal annealing prior to metal electrode deposition increased the photon conversion efficiency to as high as 6.6%, with this enhanced efficiency being maintained even with prolonged annealing (240 hours at 80 °C). This enhancement in performance with thermal annealing was correlated with increased polymer crystallinity.
published_date 2014-12-31T03:38:52Z
_version_ 1763751737345179648
score 11.036334

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