Regensburg 2007 – wissenschaftliches Programm
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SYOE: Symposium Organic Thin Film Electronics: From Molecular Contacts to Devices
SYOE 8: Poster Session SYOE
SYOE 8.78: Poster
Dienstag, 27. März 2007, 18:00–20:00, Poster B
Characterization of Large Area Organic Photodetectors on Flexible Substrates — •Sandro Tedde1, Edgar Zaus1, Tobias Rauch1, Jens Fürst1, and Paolo Lugli2 — 1Siemens AG, CT MM 1, Günther-Scharowsky-Str. 1, 91052 Erlangen — 2TU München, Lehrstuhl für Nanoelektronik, Arcisstraße 21, 80333 München
Photodetectors realized by solution processable organic semiconductors offer the possibility to realize large area and low weight devices on flexible substrates with low cost production processes. We report on organic photodetectors, with areas up to 40mm2, processed on flexible multibarrier coated PET foils. A poly-3-hexyl-thiophene (P3HT):[6,6]-phenyl C61 butyric acid methyl ester (PCBM) blend, forming a bulk heterojunction represents the active light absorbing layer for visible light. A thin film encapsulation ensures protection of the device against oxygen and moisture and the maintenance of a good flexibility. Accelerated lifetime tests using a climatic chamber under different temperature and humidity conditions have been performed. By the use of ITO as bottom electrode and a semitransparent metallic top electrode it is possible to realize semitransparent devices for the visible spectral range. The effects on the current-voltage curves while curving the substrates will be additionally presented. For demonstration purpose a linear array of 14 large area photodetectors (40mm2) was produced, indicating the light response of each detector by an LED.