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SYOP: Symposium Organic Photovoltaics: From Single Molecules to Devices

SYOP 4: Organic Photovoltaics: from Single Molecules to Devices

SYOP 4.43: Poster

Donnerstag, 26. März 2009, 16:30–19:00, P1A

Morphology Optimization of Diblock Copolymer Based Polymer Solar Cells — •Chetan Raj Singh, Martin Kunz, and Harald Hoppe — Institute of Physics, TU Ilmenau, 98693 Ilmenau, Germany

Diblock copolymers have emerged during the last few years as single active layer material in polymer solar cells with extraordinary high morphological stability. The immiscibility of two covalently bonded donor and acceptor blocks drives the nanoscale phase separation between them and leads to self organized nanometer-scale morphology. The desired perpendicular orientation of donor and acceptor phases on the substrate is aimed by various treatments including thermal annealing and solvent vapor annealing. We analyzed the success of the post-production treatments via optical absorption, photoluminescence spectroscopy, atomic force microscopy and light-induced electron spin resonance.