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  Structural Characterization of Highly Oriented Naphthalene-Diimide-Bithiophene Copolymer Films via Vibrational Spectroscopy

Giussani, E., Brambilla, L., Fazzi, D., Sommer, M., Kayunkid, N., Brinkmann, M., et al. (2015). Structural Characterization of Highly Oriented Naphthalene-Diimide-Bithiophene Copolymer Films via Vibrational Spectroscopy. The Journal of Physical Chemistry B, 119(5), 2062-2073. doi:10.1021/jp511451s.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-18FF-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0028-1900-5
Genre: Journal Article

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 Creators:
Giussani, Ester1, 2, Author
Brambilla, Luigi2, Author
Fazzi, Daniele3, Author              
Sommer, Michael4, Author
Kayunkid, Navaphun5, Author
Brinkmann, Martin5, Author
Castiglioni, Chiara2, Author
Affiliations:
1Center for NanoScience and Technology CNST, IIT@PoliMi, via Pascoli 70/3, 20133 Milano, Italy, ou_persistent22              
2Dipartimento di Chimica, Materiali e Ing. Chimica, CMIC, “G. Natta”, Politecnico di Milano, p.zza Leonardo da Vinci, 20133 Milano, Italy, ou_persistent22              
3Research Department Thiel, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445590              
4Institute for Macromolecular Chemistry, University of Freiburg, Stefan-Meier-Strasse 31, 79104 Freiburg, Germany, ou_persistent22              
5Institut Charles Sadron, CNRS − Université de Strasbourg, 23 Rue du Loess, 67034 Strasbourg, France, ou_persistent22              

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 Abstract: Epitaxially grown highly oriented crystalline films, named form I and form II, and spin-coated films of poly{[N,N'-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5'-(2,2'-bithiophene)}, P(NDI2OD-T2), have been investigated through infrared vibrational spectroscopy techniques (infrared absorption in double transmission at normal incidence (IRA-TR) and reflection absorption infrared spectroscopy at grazing angle incidence (RAIRS)) to get access to polymer chain orientation and structure. An analytic model to correlate the experimental intensities of the IR bands with structural parameters has been developed and applied for the three film morphologies. While spin-coated and form I films show P(NDI2OD-T2) chains lying parallel to the substrate in the face-on arrangement, form II films feature a structure with chains tilted out from the surface. The combined experimental and theoretical methodology gives insights into the local molecular orientations of naphthalene diimide (NDI2OD) and bithiophene (T2) counits. This approach can be easily extended to a variety of organic polymer semiconductors, allowing one to directly correlate molecular structure to properties such as charge transport, which is of fundamental relevance for developing quantitative models for applications in organic electronics and photovoltaics.

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Language(s): eng - English
 Dates: 2015-01-062014-11-152015-01-072015-02-05
 Publication Status: Published in print
 Pages: 12
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: ISI: 000349137000029
DOI: 10.1021/jp511451s
 Degree: -

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Title: The Journal of Physical Chemistry B
  Other : J. Phys. Chem. B
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Chemical Society
Pages: - Volume / Issue: 119 (5) Sequence Number: - Start / End Page: 2062 - 2073 Identifier: ISSN: 1520-6106
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000293370_1