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Fullerene aggregation in thin films of polymer blends for solar cell applications
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Physics (from 2013).ORCID iD: 0000-0002-1609-8909
Karlstad University, Faculty of Health, Science and Technology (starting 2013), Department of Engineering and Chemical Sciences (from 2013).ORCID iD: 0000-0002-0995-3823
2018 (English)In: Materials, ISSN 1996-1944, E-ISSN 1996-1944, Vol. 11, no 11, article id 2068Article in journal (Refereed) Published
Abstract [en]

We report on the effects of the film morphology on the fluorescence spectra for a thin film including a quinoxaline-based co-polymer (TQ1) and a fullerene derivative ([6,6]-phenyl-C71-butyric acid methyl ester-PC70BM). The ratio between the polymer and the fullerene derivative, as well as the processing solvent, were varied. Besides the main emission peak at 700 nm in the fluorescence spectra of thin films of this phase-separated blend, a broad emission band is observed with a maximum at 520-550 nm. The intensity of this emission band decreases with an increasing degree of mixing in the film and becomes most prominent in thicker films, films with high PC70BM content, and films that were spin-coated from solvents with lower PC70BM solubility. We assign this emission band to aggregated PC70BM.

Place, publisher, year, edition, pages
MDPI, 2018. Vol. 11, no 11, article id 2068
Keywords [en]
Fluorescence, Fullerene aggregation, Organic photovoltaics, Organic solar cells, Butyric acid, Fullerenes, Polymer blends, Polymer films, Solar cells, Solar power generation, Broad emission bands, Degree of mixing, Emission bands, Film morphology, Fluorescence spectra, Fullerene derivative, Solar-cell applications, Thin films
National Category
Chemical Sciences Physical Sciences
Research subject
Physics; Chemistry
Identifiers
URN: urn:nbn:se:kau:diva-70341DOI: 10.3390/ma11112068ISI: 000451755500003Scopus ID: 2-s2.0-85055594581OAI: oai:DiVA.org:kau-70341DiVA, id: diva2:1266834
Available from: 2018-11-29 Created: 2018-11-29 Last updated: 2019-04-26Bibliographically approved

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Moons, Ellenvan Stam, Jan

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