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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.78: Poster

Donnerstag, 26. März 2009, 16:30–19:00, P1A

Novel ultra-high 3D resolution surface structuring and thin film stress investigation — •Ferdinand Messow, Daniel Todorov, Thomas Kusserow, Stefan Wittzack, Florestan Köhler, Martin Bartels, and Hartmut Hillmer — University of Kassel, Institute of Nanostructure Technologies and Analytics, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

To improve the efficiency of photovoltaic systems, functional surfaces are attractive to guide light into photo sensitive regions - capable of mass production with easy and cheap structuring. Today, NanoImprint uses 2D templates in most cases. Our novel NanoImprint templates reveal residual surface roughness and accuracies down to 0.2 nm. High-resolution 3D imprinted structures are presented.

Further efficiency increase can be achieved by anti-reflection coatings. Unfortunately most thin films provide stress and, therefore, define self-organized structures on viscoelastic organic materials due to stress release. Local stress of thin zirconium dioxide and silicon dioxide films deposited by ion beam sputter deposition was scrutinized, since these materials show no absorption in the UV-range, enlarging the range of usable light.