Eur. Phys. J. Appl. Phys.
Volume 51, Number 3, September 2010
Focus on Flexible Organic Electronics
|Number of page(s)||5|
|Published online||02 September 2010|
Organic optoelectronic devices-flexibility versus performance
XLIM UMR 6172-Université de Limoges/CNRS, 123 av. Albert
Thomas, 87060 Limoges Cedex, France
2 LPSMS, FST Errachidia, BP 509, Boutalamine, Errachidia, Morocco
Corresponding author: firstname.lastname@example.org
Revised: 5 January 2010
Accepted: 10 June 2010
Published online: 2 September 2010
In this paper, we discuss the effect of flexible substrates on the characteristics of two organic optoelectronic devices, namely P3HT:PCBM-based photovoltaic bulk heterojunctions and pentacene-based phototransistors. In addition, we have developed anode materials deposited by ion beam sputtering, a technique which satisfies the low temperature deposition requirements associated with the use of plastic substrates. The anode materials consisted of indium tin oxide (ITO) and ITO/metal/ITO tri-layers. The use of tri-layer anodes in P3HT:PCBM-based solar cells resulted in an increase in the fill factor and the power conversion efficiency reached a value of 2% with an ITO(70 nm)/Ag(14 nm)/ITO(70 nm) anode deposited on a polyphthalate carbonate substrate. In the case of phototransistors, a photosensitivity of 1.6 × 104 under illumination at 365 nm (with a power intensity of 7 mW/cm2) was obtained in the off-state of the transistor. We have fine-tuned the anode structure and deposition/annealing conditions towards flexible organic devices and optimal device characteristics.
© EDP Sciences, 2010
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