Berlin 2005 – scientific programme

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SYOO: Organic Optoelectronics and Photonics

SYOO 6: Poster

SYOO 6.16: Poster

Monday, March 7, 2005, 18:00–20:00, Poster TU A

Influence of the device geometry on the efficiency of polymer solar cells — •Thomas Kietzke, Chunhong Yin, and Dieter Neher — Institut für Physik, Physik weicher Materie, Am neuen Palais 10, 14469 Potsdam

Polymer based solar cells offer the potential for large area flexible devices. However, currently the efficiencies are still lower than the values obtained for their inorganic counterparts. We present the results of investigations on solar cells based on semiconducting polymers in different geometries (blend, layered, nanostructured) and with different cathode materials (Ca, TiOx). External quantum efficiencies exceeding 30 % could be reached by blending a soluble PPV derivative with a cyano substituted PPV as the electron acceptor. We show how the different preparation techniques influence the device efficiency and present an approach based on a nanostructured layer how to improve efficiencies in future.

References:

Yu, G., Gao, J., Hummelen, J. C., Wudl, F., Heeger, A. J. Polymer Photovoltaic Cells - Enhanced Efficiencies Via a Network of Internal Donor-Acceptor Heterojunctions. Science 270, 1789-1791 (1995).

Kietzke, T., Landfester K., Neher D. et. al. Novel approaches to polymer blends based on polymer nanoparticles. Nature Materials 2, 408-412 (2003).