Dresden 2009 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 40: POSTERS Electronic and Optical Properties

CPP 40.11: Poster

Thursday, March 26, 2009, 17:00–19:30, P3

Terahertz Time Domain Spectroscopy of PEDOT:PSS conducting polymer for photovoltaic devices — •Monika Weber¹, Konrad von Volkmann¹, Tobias Kampfrath³, Martin Scheuch¹, Ingo Salzmann², Christian Frischkorn¹, Norbert Koch², and Martin Wolf¹ — ¹Institute of Experimental Physics, Freie Universität Berlin — ²Physics Institute, Humboldt-University Berlin — ³FOM Institute for Atomic and Molecular Physics [AMOLF], Amsterdam

The number of polymer based devices grows very fast. Almost all of them, like organic field effect transistors, electro luminescent panels, LEDs or photovoltaic cells, use conducting layers. One of widely used intrinsic conducting polymers is poly-(3,4-ethylenedioxythiophene) complex with sulfonic acid also known as PEDOT:PSS. Understanding of charge transfer in PEDOT:PSS is still lacking.

Here, we present first measurements of PEDOT:PSS thin films measured with terahertz time domain spectroscopy in a frequency range between 8 THz and 32 THz. THz TD spectroscopy allows us to determine the complex dielectric function and conductivity. Temperature-dependent measurements give information about charge transfer.