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Characterisation of vertical phase separation in polymer: fullerene blend films for photovoltaics by dSIMS and NEXAFS
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. Karlstad University, Faculty of Technology and Science, Materials Science. (Materialfysik)
Karlstad University, Faculty of Technology and Science, Department of Physics and Electrical Engineering. (Materialvetenskap)
M. Smoluchowski Insitute of Physics, Jagiellonian University, Reymonta 4, Krakow 30–059, Poland.
Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, Krakow 30–059, Poland.
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2011 (English)In: E-MRS 2011 Spring Meeting: Bilateral Energy Conference, Malden, MA: John Wiley & Sons, 2011, p. 62-63Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Morphological control and characterization of blend films is key in the development of viable polymer solar cells. Spontaneous formation of vertical compositional gradients during solution processing has been shown for polyfluorene:PCBM blends and rationalized with thermodynamic and kinetic models of nucleation and spinodal decomposition.[1, 2] The extent of vertical stratification is affected by polymer side-chain modification aimed at controlling polymer:fullerene miscibility.[3] Here we present high-resolution film morphology results for several polymer:fullerene systems as obtained from near-edge X-ray fine structure spectroscopy (NEXAFS) in partial and in total electron yield modes. Blend films were found to be polymer- enriched at the surface. Dynamic secondary ion mass spectrometry (dSIMS) and NEXAFS give compositional information at different depths, resulting in a more complete picture of the film morphology.

 

Place, publisher, year, edition, pages
Malden, MA: John Wiley & Sons, 2011. p. 62-63
National Category
Condensed Matter Physics
Research subject
Physics; Materials Science
Identifiers
URN: urn:nbn:se:kau:diva-15768OAI: oai:DiVA.org:kau-15768DiVA, id: diva2:571788
Conference
E-MRS 2011 Spring Meeting, Bilateral Energy Conference, Acropolis Congress Center, Nice, France, May 9-13, 2011
Funder
Swedish Research Council, 2010-4155Available from: 2012-11-23 Created: 2012-11-23 Last updated: 2019-05-20Bibliographically approved

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http://www.emrs-strasbourg.com/files/USB%2011/symposium_n.pdf

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Anselmo, Ana SofiaDzwilewski, Andrzejvan Stam, JanSvensson, KristerMoons, Ellen

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Anselmo, Ana SofiaDzwilewski, Andrzejvan Stam, JanSvensson, KristerMoons, Ellen
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Department of Physics and Electrical EngineeringMaterials ScienceDepartment of Chemistry and Biomedical Sciences
Condensed Matter Physics

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