XPS Analysis of the chemical degradation of PTB7 polymers for organic photovoltaics

Hdl Handle:
http://hdl.handle.net/10034/620213
Title:
XPS Analysis of the chemical degradation of PTB7 polymers for organic photovoltaics
Authors:
Kettle, Jeff; Ding, Ziqian; Smith, Graham C.; Horie, Masaki
Abstract:
The chemical degradation of the 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]] or ‘ PTB7’ has been studied using X-ray Photoelectron Spectroscopy (XPS). This material system appears to be intrinsically unstable especially when illuminated in air and XPS studies confirm the rapid photo-degradation is related to changes in chemical structure of the polymer. In particular, XPS spectra show an initial reduction in relative C-C intensity, suggests loss of the alkoxy side chains. This is followed by a dramatic increase in the level of oxygen-bonded species, especially C-O at ~286.5 eV and C(=O)O at 289.2 eV, indicative of COOH and OH group formation, and oxidation of S. The XPS results support the view that using processing additives reduces the chemical stability of the polymer and provides insight into strategies to improve molecular design to ensure higher chemical stability.
Affiliation:
Bangor University, National Tsing Hua University, Taiwan, University of Chester
Citation:
Kettle, J., Ding, Z., Horie, M., & Smith, G. C. (2016). XPS analysis of the chemical degradation of PTB7 polymers for organic photovoltaics. Organic Electronics, 39, 222-228. doi: http://dx.doi.org/10.1016/j.orgel.2016.10.016
Publisher:
Elsevier
Journal:
Organic Electronics
Publication Date:
14-Oct-2016
URI:
http://hdl.handle.net/10034/620213
DOI:
10.1016/j.orgel.2016.10.016
Additional Links:
http://www.sciencedirect.com/science/article/pii/S1566119916304438
Type:
Article
Language:
en
ISSN:
1566-1199
Appears in Collections:
Natural Sciences

Full metadata record

DC FieldValue Language
dc.contributor.authorKettle, Jeffen
dc.contributor.authorDing, Ziqianen
dc.contributor.authorSmith, Graham C.en
dc.contributor.authorHorie, Masakien
dc.date.accessioned2016-10-21T08:44:46Z-
dc.date.available2016-10-21T08:44:46Z-
dc.date.issued2016-10-14-
dc.identifier.citationKettle, J., Ding, Z., Horie, M., & Smith, G. C. (2016). XPS analysis of the chemical degradation of PTB7 polymers for organic photovoltaics. Organic Electronics, 39, 222-228. doi: http://dx.doi.org/10.1016/j.orgel.2016.10.016en
dc.identifier.issn1566-1199-
dc.identifier.doi10.1016/j.orgel.2016.10.016-
dc.identifier.urihttp://hdl.handle.net/10034/620213-
dc.description.abstractThe chemical degradation of the 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]] or ‘ PTB7’ has been studied using X-ray Photoelectron Spectroscopy (XPS). This material system appears to be intrinsically unstable especially when illuminated in air and XPS studies confirm the rapid photo-degradation is related to changes in chemical structure of the polymer. In particular, XPS spectra show an initial reduction in relative C-C intensity, suggests loss of the alkoxy side chains. This is followed by a dramatic increase in the level of oxygen-bonded species, especially C-O at ~286.5 eV and C(=O)O at 289.2 eV, indicative of COOH and OH group formation, and oxidation of S. The XPS results support the view that using processing additives reduces the chemical stability of the polymer and provides insight into strategies to improve molecular design to ensure higher chemical stability.en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S1566119916304438en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectOPVen
dc.subjectPTB7en
dc.subjectDegradationen
dc.subjectXPSen
dc.titleXPS Analysis of the chemical degradation of PTB7 polymers for organic photovoltaicsen
dc.typeArticleen
dc.contributor.departmentBangor University, National Tsing Hua University, Taiwan, University of Chesteren
dc.identifier.journalOrganic Electronicsen
dc.date.accepted2016-10-11-
or.grant.openaccessYesen
rioxxterms.funderunfundeden
rioxxterms.identifier.projectunfundeden
rioxxterms.versionAMen
rioxxterms.licenseref.startdate2018-10-15-
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