Exploring the origin of high optical absorption in conjugated polymers

Handle URI:
http://hdl.handle.net/10754/622402
Title:
Exploring the origin of high optical absorption in conjugated polymers
Authors:
Vezie, Michelle S.; Few, Sheridan; Meager, Iain; Pieridou, Galatia; Dörling, Bernhard; Ashraf, Raja Shahid; Goñi, Alejandro R.; Bronstein, Hugo; McCulloch, Iain ( 0000-0002-6340-7217 ) ; Hayes, Sophia C.; Campoy-Quiles, Mariano; Nelson, Jenny
Abstract:
The specific optical absorption of an organic semiconductor is critical to the performance of organic optoelectronic devices. For example, higher light-harvesting efficiency can lead to higher photocurrent in solar cells that are limited by sub-optimal electrical transport. Here, we compare over 40 conjugated polymers, and find that many different chemical structures share an apparent maximum in their extinction coefficients. However, a diketopyrrolopyrrole-thienothiophene copolymer shows remarkably high optical absorption at relatively low photon energies. By investigating its backbone structure and conformation with measurements and quantum chemical calculations, we find that the high optical absorption can be explained by the high persistence length of the polymer. Accordingly, we demonstrate high absorption in other polymers with high theoretical persistence length. Visible light harvesting may be enhanced in other conjugated polymers through judicious design of the structure.
KAUST Department:
Solar and Photovoltaic Engineering Research Center (SPERC)
Citation:
Vezie MS, Few S, Meager I, Pieridou G, Dörling B, et al. (2016) Exploring the origin of high optical absorption in conjugated polymers. Nature Materials 15: 746–753. Available: http://dx.doi.org/10.1038/nmat4645.
Publisher:
Springer Nature
Journal:
Nature Materials
Issue Date:
16-May-2016
DOI:
10.1038/nmat4645
Type:
Article
ISSN:
1476-1122; 1476-4660
Sponsors:
M.S.V. and S.F. are grateful to the Engineering and Physical Sciences Research Council (EPSRC) for a doctoral training award and a CDT studentship (EP/G037515/1), respectively. G.P. and S.C.H. acknowledge the University of Cyprus for funding through the internal grant 'ORGANIC'. B.D., A.R.G. and M.C.-Q. acknowledge financial support from the Ministerio de Economia y Competitividad of Spain through projects CSD2010-00044 (Consolider NANOTHERM), SEV-2015-0496 and MAT2012-37776 and the European Research Council through project ERC CoG648901. I.Meager., R.S.A. and I.McCulloch acknowledge support from the European Commission FP7 Project ArtESun (604397). J.N. is grateful to the Royal Society for a Wolfson Merit Award, and acknowledges financial support from EPSRC grants EP/K030671/1, EP/K029843/1 and EP/J017361/1. The authors thank I. Alonso for performing supplementary ellipsometric measurements; we thank T. Kirchartz, J. Moore Frost, C. Muller, I. Alonso and A. Myers for helpful discussions.
Appears in Collections:
Articles; Solar and Photovoltaic Engineering Research Center (SPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorVezie, Michelle S.en
dc.contributor.authorFew, Sheridanen
dc.contributor.authorMeager, Iainen
dc.contributor.authorPieridou, Galatiaen
dc.contributor.authorDörling, Bernharden
dc.contributor.authorAshraf, Raja Shahiden
dc.contributor.authorGoñi, Alejandro R.en
dc.contributor.authorBronstein, Hugoen
dc.contributor.authorMcCulloch, Iainen
dc.contributor.authorHayes, Sophia C.en
dc.contributor.authorCampoy-Quiles, Marianoen
dc.contributor.authorNelson, Jennyen
dc.date.accessioned2017-01-02T09:28:29Z-
dc.date.available2017-01-02T09:28:29Z-
dc.date.issued2016-05-16en
dc.identifier.citationVezie MS, Few S, Meager I, Pieridou G, Dörling B, et al. (2016) Exploring the origin of high optical absorption in conjugated polymers. Nature Materials 15: 746–753. Available: http://dx.doi.org/10.1038/nmat4645.en
dc.identifier.issn1476-1122en
dc.identifier.issn1476-4660en
dc.identifier.doi10.1038/nmat4645en
dc.identifier.urihttp://hdl.handle.net/10754/622402-
dc.description.abstractThe specific optical absorption of an organic semiconductor is critical to the performance of organic optoelectronic devices. For example, higher light-harvesting efficiency can lead to higher photocurrent in solar cells that are limited by sub-optimal electrical transport. Here, we compare over 40 conjugated polymers, and find that many different chemical structures share an apparent maximum in their extinction coefficients. However, a diketopyrrolopyrrole-thienothiophene copolymer shows remarkably high optical absorption at relatively low photon energies. By investigating its backbone structure and conformation with measurements and quantum chemical calculations, we find that the high optical absorption can be explained by the high persistence length of the polymer. Accordingly, we demonstrate high absorption in other polymers with high theoretical persistence length. Visible light harvesting may be enhanced in other conjugated polymers through judicious design of the structure.en
dc.description.sponsorshipM.S.V. and S.F. are grateful to the Engineering and Physical Sciences Research Council (EPSRC) for a doctoral training award and a CDT studentship (EP/G037515/1), respectively. G.P. and S.C.H. acknowledge the University of Cyprus for funding through the internal grant 'ORGANIC'. B.D., A.R.G. and M.C.-Q. acknowledge financial support from the Ministerio de Economia y Competitividad of Spain through projects CSD2010-00044 (Consolider NANOTHERM), SEV-2015-0496 and MAT2012-37776 and the European Research Council through project ERC CoG648901. I.Meager., R.S.A. and I.McCulloch acknowledge support from the European Commission FP7 Project ArtESun (604397). J.N. is grateful to the Royal Society for a Wolfson Merit Award, and acknowledges financial support from EPSRC grants EP/K030671/1, EP/K029843/1 and EP/J017361/1. The authors thank I. Alonso for performing supplementary ellipsometric measurements; we thank T. Kirchartz, J. Moore Frost, C. Muller, I. Alonso and A. Myers for helpful discussions.en
dc.publisherSpringer Natureen
dc.titleExploring the origin of high optical absorption in conjugated polymersen
dc.typeArticleen
dc.contributor.departmentSolar and Photovoltaic Engineering Research Center (SPERC)en
dc.identifier.journalNature Materialsen
dc.contributor.institutionCentre for Plastic Electronics, Department of Physics, Imperial College London, Prince Consort Road, London, SW7 2AZ, United Kingdomen
dc.contributor.institutionCentre for Plastic Electronics, Department of Chemistry, Imperial College London, Exhibition Road, London, SW7 2AZ, United Kingdomen
dc.contributor.institutionDepartment of Chemistry, University of Cyprus, PO Box 20537, Nicosia, 1678, Cyprusen
dc.contributor.institutionInstitute of Material Science of Barcelona (ICMAB-CSIC), Campus UAB, Bellaterra, 08193, Spainen
dc.contributor.institutionICREA, Passeig Lluís Companys 23, Barcelona, 08010, Spainen
dc.contributor.institutionDepartment of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdomen
kaust.authorMcCulloch, Iainen
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