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Permeation barrier properties of thin oxide films on flexible polymer substrates

: Fahlteich, J.; Fahland, M.; Schönberger, W.; Schiller, N.


Meinema, H.A.:
7th International Conference on Coatings on Glass and Plastics. ICCG 2008. Advanced Coatings for Large-Area of High-Volume Products. Selected papers : June 15 - 19, 2008, Eindhoven/Veldhoven, The Netherlands
St. Louis/Mo.: Elsevier, 2009 (Thin solid films 517.2009, Nr.10)
ISSN: 0040-6090
International Conference on Coatings on Glass and Plastics (ICCG) <7, 2008, Eindhoven>
Konferenzbeitrag, Zeitschriftenaufsatz
Fraunhofer FEP ()
permeation barrier; reactive sputtering; magnetron PECVD; encapsulation; flexible electronics; zinc oxide; aluminium oxide

Solar cells and organic electronic devices require an encapsulation to ensure sufficient lifetime. Key parameters of the encapsulation are permeation barrier, UV stability, temperature stability, optical transmission spectra and mechanical stability. The requirements depend very much on the specific application. Many work groups suggest multilayer stacks to meet the permeation requirements. In this paper the permeation barrier properties of the different constituents of such a multilayer stack are characterized. Different layer materials are compared regarding their water vapour and oxygen permeability as well as the influence of process parameters is examined. Finally temperature dependent permeation measurements are used to characterize the permeation mechanisms in the different constituents of the multilayer barrier.