Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 61: Organic electronics and photovoltaics III (organized by CPP)

HL 61.3: Talk

Wednesday, April 2, 2014, 10:00–10:15, ZEU 260

Layer by layer solution processing of nanostructured all-polymer solar cells — •Thomas Pfadler, Mihael Coric, Jonas Weickert, Karl-Philipp Strunk, and Lukas Schmidt-Mende — University of Konstanz

Organic solar cells have the potential to become an important low-cost alternative to conventional solar cells. However, before this can happen, the energy harvesting potential of organic solar cells must become more comparable with that of the pervading technology. This research is focusing on nanoimprint lithography (NIL), a low-cost lithographic method for high-throughput patterning applicable to organic semiconductors. This technique can be used to tailor an organic solar cells active material on a nanometer scale. A promising application of NIL aims to control the nanostructure of a donor-acceptor interface in an organic all-polymer device. The electron accepting polymer is structured. A stiff polymer network featuring a nanostructured topography is developed by the usage of a photoactivable crosslinker molecule (sFPA). The crosslinked polymer matrix is not dissolved during spincoating the donor polymer allowing fully solution processed device fabrication with controlled nanostructured donor-acceptor interfaces. Target of this approach is to investigate nanostructured bi-layer devices with controlled interfaces to finally enhance the overall efficiency by maximizing the interfacial area, increasing the exciton separation yield and ensuring direct pathways to the electrodes.