Conference Paper/Proceeding/Abstract 667 views
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 
,
James Durrant,
Hugo Bronstein,
Tracey M. Clarke
,
James Durrant,
Hugo Bronstein,
Tracey M. Clarke
Proc. SPIE 9923, Volume: 9923, Start page: 992318
Swansea University Author:
Stoichko Dimitrov
Full text not available from this repository: check for access using links below.
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...
| Published in: | Proc. SPIE 9923 |
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| ISSN: | 0277-786X |
| Published: |
2016
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa32018 |
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| 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 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. |
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| Keywords: |
Absorption spectroscopy ; Organic electronics ; Polymers ; Thin films ; Electrons ; Fullerenes |
| College: |
Faculty of Science and Engineering |
| Start Page: |
992318 |