Dresden 2009 – scientific programme
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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices
SYOP 1: Organic Photovoltaics I
SYOP 1.12: Talk
Wednesday, March 25, 2009, 16:45–17:00, ZEU 222
Light- and touch-point localization using flexible large area organic photodiodes — •Petr Bartu1, Robert Koeppe1,2,3, Siegfried Bauer1, and Niyazi Serdar Sariciftci2 — 1Department of Soft Matter Physics (SoMaP), JKU Linz, Altenbergerstr. 69, A-4040 Linz, Austria — 2Linz Institute for Organic Solar Cells (LIOS), JKU Linz, Altenbergerstr. 69, A-4040 Linz, Austria — 3isiQiri interface technologies GmbH i.G., c/o tech2b, Hafenstr. 47-51, A-4020 Linz, Austria
A large area photodiode using a heterojunction of zinc-phthalocyanine and fullerene C60 as active layer sandwiched between resistive electrodes of Poly(ethylenedioxythiophenes) Polystyrenesulfonate (PEDOT:PSS) and semitransparent aluminum can be used as a two dimensional position sensitive device for detecting light spots. The current generated in the photodiode drops over resistive electrodes to the edges of the device and depends on the distance between the excitation and the point where the resistive electrode is connected with the outer circuit. For precise tuning of the device, a variation of the electrode sheet resistance as well as a change in modulation of the frequency can be used. Additionally, localized out-coupling of light from a waveguide of silicone rubber by pressure allows the construction of a pressure sensitive optical touchpad.