View Generic Document: The Observance and Removal of PSS Top Layer in Poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic Acid (PEDOT-PSS) Conducting Thin Films
Citation:
Brooks, Charles (2005). The Observance and Removal of PSS Top Layer in Poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic Acid (PEDOT-PSS) Conducting Thin Films. National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce..
The polyelectrolyte complex, poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid (PEDOT-PSS), is commonly used as a conducting polymer in organic electronic devices currently
under intense research. The presence of a top layer in PEDOT-PSS films, deposited from an aqueous dispersion of PEDOT-PSS by spincoating, has been observed. This was done by performing x-ray
reflectivity and UV-VIS-NIR spectrophotometry before and after the removal of this top layer using an aqueous treatment. X-ray reflectivity provided sample thickness and roughness while UV-VIS-NIR
spectrophotometry was used to obtain absorbance over a wide range of wavelengths. Film thickness after removal of the top layer decreases by between 30 to 40 % while optical absorbance decreases by
only 5 to 11 percent. This indicates that the material in the top layer, the material being removed, is not responsible for the optical absorbance. Because the optical absorbance is primarily due
to the conducting polymer PEDOT, the top layer is believed to be the electrically insulating polymer, PSS. The removal of this insulating top layer is critical to improving the charge transfer
between interfaces involving PEDOT-PSS.
Publisher
National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce.
Guest - January 07, 2009
View Generic Document: The Observance and Removal of PSS Top Layer in Poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic Acid (PEDOT-PSS) Conducting Thin Films 