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 8.79: Poster
Dienstag, 27. März 2007, 18:00–20:00, Poster B
Annealing Studies on Organic Photodetectors using Impedance Spectroscopy — •Edgar Zaus1, Sandro Tedde1, Tobias Rauch1, Jens Fürst1, and Gottfried Döhler2 — 1Siemens AG, CT MM 1, Günther-Scharowsky-Str. 1, 91050 Erlangen — 2Max Planck Research Group for Optics, Information and Photonics, University of Erlangen-Nürnberg, Günther-Scharowsky-Str. 1, 91052 Erlangen
Organic photo detectors offer various advantages over inorganic devices, e.g. large area imaging at low fabrication costs and the realization of the devices on flexible substrates. A poly-3-hexyl-thiophene (P3HT):[6,6]-phenyl C61 butyric acid methyl ester (PCBM) blend, forming a bulk heterojunction, is a widely used absorbing material due to its good exciton dissociation properties. Annealing of the device leads to a significant improvement of bulk heterojunction organic solar cells as reported in literature. We show that also the performance of organic photodetectors is influenced positively by thermal treatment. Results obtained from impedance spectroscopy measurements in addition to current-voltage characteristics and charge extraction by linearly increasing voltage (CELIV) measurements give insight into the annealing effects.