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Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications

Artem A. Bakulin, Robert Lovrincic, Natalie Banerji, Kealan J. Fallon, Stoichko Dimitrov Orcid Logo, James Durrant, Hugo Bronstein, Tracey M. Clarke

Proc. SPIE 9923, Volume: 9923, Start page: 992318

Swansea University Author: Stoichko Dimitrov Orcid Logo

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DOI (Published version): 10.1117/12.2237629

Abstract

In this paper two extremely narrow band-gap polymers, based on naturally occurring indigo with high thin film crystallinity, have been examined using transient absorption spectroscopy. This was done in order to assess their charge photogeneration and recombination characteristics in blends with PC71...

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Published in: Proc. SPIE 9923
ISSN: 0277-786X
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa32018
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first_indexed 2017-02-20T19:33:51Z
last_indexed 2018-02-09T05:19:29Z
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spelling 2017-06-02T10:19:10.9046233 v2 32018 2017-02-20 Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications 9fc26ec1b8655cd0d66f7196a924fe14 0000-0002-1564-7080 Stoichko Dimitrov Stoichko Dimitrov true false 2017-02-20 EEN In this paper two extremely narrow band-gap polymers, based on naturally occurring indigo with high thin film crystallinity, have been examined using transient absorption spectroscopy. This was done in order to assess their charge photogeneration and recombination characteristics in blends with PC71BM. Two charge photogeneration mechanisms are found to be operating, depending on which component of the blend is photoexcited. Despite virtually isoenergetic LUMO levels, photoexcitation of the polymer causes standard electron transfer, albeit with a relatively low efficiency of 17 %. Photoexcitation of the fullerene, however, produces an exceptionally slow nanosecond timescale hole transfer. Conference Paper/Proceeding/Abstract Proc. SPIE 9923 9923 992318 0277-786X Absorption spectroscopy ; Organic electronics ; Polymers ; Thin films ; Electrons ; Fullerenes 26 9 2016 2016-09-26 10.1117/12.2237629 http://dx.doi.org/10.1117/12.2237629 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-06-02T10:19:10.9046233 2017-02-20T16:44:40.9151509 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Artem A. Bakulin 1 Robert Lovrincic 2 Natalie Banerji 3 Kealan J. Fallon 4 Stoichko Dimitrov 0000-0002-1564-7080 5 James Durrant 6 Hugo Bronstein 7 Tracey M. Clarke 8
title Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
spellingShingle Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
Stoichko Dimitrov
title_short Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
title_full Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
title_fullStr Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
title_full_unstemmed Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
title_sort Transient absorption spectroscopy of ultra-low band gap polymers for organic electronic applications
author_id_str_mv 9fc26ec1b8655cd0d66f7196a924fe14
author_id_fullname_str_mv 9fc26ec1b8655cd0d66f7196a924fe14_***_Stoichko Dimitrov
author Stoichko Dimitrov
author2 Artem A. Bakulin
Robert Lovrincic
Natalie Banerji
Kealan J. Fallon
Stoichko Dimitrov
James Durrant
Hugo Bronstein
Tracey M. Clarke
format Conference Paper/Proceeding/Abstract
container_title Proc. SPIE 9923
container_volume 9923
container_start_page 992318
publishDate 2016
institution Swansea University
issn 0277-786X
doi_str_mv 10.1117/12.2237629
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://dx.doi.org/10.1117/12.2237629
document_store_str 0
active_str 0
description In this paper two extremely narrow band-gap polymers, based on naturally occurring indigo with high thin film crystallinity, have been examined using transient absorption spectroscopy. This was done in order to assess their charge photogeneration and recombination characteristics in blends with PC71BM. Two charge photogeneration mechanisms are found to be operating, depending on which component of the blend is photoexcited. Despite virtually isoenergetic LUMO levels, photoexcitation of the polymer causes standard electron transfer, albeit with a relatively low efficiency of 17 %. Photoexcitation of the fullerene, however, produces an exceptionally slow nanosecond timescale hole transfer.
published_date 2016-09-26T03:39:10Z
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score 11.035874

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