Regensburg 2010 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Poster: Organic Electronics and Photovoltaics
CPP 27.23: Poster
Wednesday, March 24, 2010, 17:30–19:00, Poster C
Encapsulation of thin fluorescent polymer films with graphenes — •Philipp Lange1, Martin Dorn1, Nikolai Severin1, David Vanden Bout2, and Jürgen P. Rabe1 — 1Humboldt-Universität zu Berlin, Department of Physics, Newtonstr. 15, 12489 Berlin, Germany — 2The University of Texas at Austin, Department of Biochemistry and Chemistry, Austin, Texas 78712, USA
Conjugated polymers are widely used as active layers in organic electronics. While they exhibit a high potential for new device concepts and low cost fabrication, they suffer from fast degradation under ambient conditions due to reactions with oxygen and moisture. To achieve reliable and long time operation, commercial organic devices are protected with multilayer encapsulation techniques. Graphene has recently been attracting increasing interest due to its remarkable mechanical, optical and electronic properties, which qualifies it for potential application in future electronic devices. This work addresses the question in how far graphenes deposited on top of a thin organic film can protect it sufficiently from degradation by moisture and oxygen. The polymer films are produced by spincoating on mica after which a graphene layer is deposited by mechanical exfoliation. The degradation of the polymer films is investigated with fluorescence microscopy. Our results indicate a substantial reduction in the degradation of organic material covered by graphene and suggest that graphenes can function simultaneously as transparent electrodes and encapsulation layers in future electronic devices.