Surface morphology, optical properties and conductivity changes of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) by using additives

Gasiorowski, Jacek and Menon, Reghu and Hingerl, Kurt and Dachev, Marko and Sariciftci, Niyazi Serdar (2013) Surface morphology, optical properties and conductivity changes of poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) by using additives. In: Thin Solid Films, 536 . pp. 211-215.

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Abstract

The optical properties and electrical conductivity of highly conducting poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrenesulfonate) (PSS) are reported as a function of the processing additive conditions. The addition of dimethyl sulfoxide (DMSO) increases the conductivity and modifies the dielectric response as observed from the ellipsometric studies. Also the surface roughness and morphology change with the composition of PEDOT: PSS: DMSO and film deposition conditions. The real part of the dielectric function becomes negative in highly conducting samples, indicating the presence of delocalized charge carriers. The real and imaginary parts of the refractive index were determined as a function of wavelength. The results are consistent with the increase in conductivity upon the addition of DMSO.

Item Type:	Journal Article
Publication:	Thin Solid Films
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Keywords:	Optical Properties; Conductivity; Surface Morphology; Conducting Polymers; Spectroscopic Ellipsometry; Organic Electronics
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	11 Jul 2013 05:42
Last Modified:	11 Jul 2013 05:42
URI:	http://eprints.iisc.ac.in/id/eprint/46784

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