Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 62: [DS] Organic Electronics and Photovoltaics I (jointly with CPP, HL, and O)

O 62.1: Vortrag

Donnerstag, 17. März 2011, 10:15–10:30, GER 38

Structuring of Organic Conductors by Laser Ablation — •Alexander Esser, Moritz Schaefer, Jens Holtkamp, and Arnold Gillner — Fraunhofer ILT, Steinbachstraße 15, 52074 Aachen

PEDOT:PSS is a transparent organic polymer with a sheet resistivity of about 200ohm/sq. These attributes make it an ideal candidate for substituting ITO in organic LEDs and organic photovoltaic cells: making them fully organic, flexible, lightweight and cheap to produce. Organic thin-film photovoltaics are a low cost alternative to state of the art silicon and other inorganic semiconductor-based solar cells. OLEDs can be made more flexible without the use of transparent conducting oxides.

We present structuring of organic conductors by laser ablation from spin coated films of PEDOT:PSS. We have investigated ablation characteristics of PEDOT:PSS depending on laser wavelength in the deep UV and required fluence. The smallest structuring resolution by UV laser patterning has been found.

In further measurements we have determined the conductivity depending on layer thickness and structure size. Especially the influence of laser radiation on conductivity and electrical properties in the vicinity of the ablated area has been studied. Therefor we have performed AFM measurements as well as four-point probing.