Thickness dependent absorption spectra in conjugated polymers: Morphology or interference?

Gaudin, Olivier P. M., Samuel, Ifor D. W., Amriou, Samia and Burn, Paul L. (2010) Thickness dependent absorption spectra in conjugated polymers: Morphology or interference?. Applied Physics Letters, 96 5: 053305-1-053305-3. doi:10.1063/1.3294636

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Author Gaudin, Olivier P. M.
Samuel, Ifor D. W.
Amriou, Samia
Burn, Paul L.
Title Thickness dependent absorption spectra in conjugated polymers: Morphology or interference?
Journal name Applied Physics Letters   Check publisher's open access policy
ISSN 0003-6951
Publication date 2010-02
Sub-type Article (original research)
DOI 10.1063/1.3294636
Open Access Status File (Publisher version)
Volume 96
Issue 5
Start page 053305-1
End page 053305-3
Total pages 3
Place of publication College Park, MD, U.S.A.
Publisher American Institute of Physics
Collection year 2011
Language eng
Formatted abstract

The thickness dependence of the absorption spectrum of spin-coated films of poly[2-(2′-ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] has been studied using reflectivity and variable angle spectroscopic ellipsometry measurements. It is found that, for films with thicknesses in the range of 18–178 nm, a single set of optical constants is sufficient to simulate accurately all the experimental data used, including the absorption spectra, independently of the film thickness or the processing conditions. Thus, the observed changes in the absorption spectrum with thickness can be fully accounted for by reflectivity and interference effects alone without the need to invoke morphology differences between films.

© 2010 American Institute of Physics

Keyword Ellipsometry
Infrared spectra
Optical constants
Polymer films
Ultraviolet spectra
Visible spectra
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2011 Collection
School of Chemistry and Molecular Biosciences
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Citation counts: TR Web of Science Citation Count  Cited 10 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
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Created: Tue, 02 Nov 2010, 09:02:25 EST