Dresden 2011 – scientific programme

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DS: Fachverband Dünne Schichten

DS 22: Focussed Session: Inorganic/Organic Semiconductor Hybrid Structures I (jointly with HL and O)

DS 22.5: Talk

Tuesday, March 15, 2011, 12:30–12:45, POT 151

Fabrication of ZnO/polymer hybride devices using chemical vapor deposition of polymers — •Jan Richters and Tobias Voss — Institut für Festkörperphysik, Universität Bremen, Otto-Hahn-Allee 1, 28359 Bremen

Due to their large surface area and good electrical conductivity, ZnO nanowires are interesting candidates for the fabrication of hybrid inorganic/organic optoelectronic devices. As an example, dye-sensitized solar cells can be prepared using a ZnO nanowire-array as one electrode with a monolayer of dye adsorbed on their surface. An additional hole-conductive material is required to form the connection with the counter electrode, where PEDOT:PSS or similar polymers can be applied. These polymer layers are usually fabricated using liquid-based synthesis-methods such as dip-coating or spin-coating which suffer from a limited penetration depth of the polymer into the pores of the nanowire array.
Here, we present a vapor-transport technique for the fabrication of dye-sensitized solar cells based on ZnO nanowires and the polymers PEDOT and polystyrene. We compare the electrical and optical properties of the devices, describe the microscopic properties of the polymer layers and provide details of the fabrication technique.