Berlin 2008 – scientific programme
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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications
SYSA 5: Poster Session SYSA
SYSA 5.37: Poster
Tuesday, February 26, 2008, 14:30–20:00, Poster A
Electronic and optical properties of evaporated organic bulk heterojunctions — •Robin Knecht1, Günther Schnurpfeil2, and Derck Schlettwein1 — 1Institut für Angewandte Physik, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 16, D-35392 Gießen, Germany — 2Institut für Organische und Makromolekulare Chemie, Universität Bremen, Leobener Strasse NW 2, D-28334 Bremen, Germany
The formation of evaporated blends of organic donor and acceptor molecules has gained interest recently for active interlayers in organic photovoltaic cells and organic field effect structures.
In this contribution we report about the combination of one component of high aggregation probability towards crystalline pathways (e.g. phthalocyaninato zinc II, PcZn) with another component of low aggregation probability towards a widely amorphous matrix (e.g. Cl4MePTCDI, a chlorinated perylene imid).
Mixed films were created by simultaneous physical vapour deposition of both substances to create an evaporated organic bulk heterojunction and studied for their potential as materials for organic photovoltaic devices. Using transmission spectroscopy, structure analysis and photovoltaic test measurements electronic and optical properties were investigated and compared with the properties of the single films and solution spectra.