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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications

SYSA 5: Poster Session SYSA

SYSA 5.37: Poster

Dienstag, 26. Februar 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.