J. Čermáka, V. Cimrováb, D. Výprachtickýb, H.-H. Hörholdc, A. Fejfara, M. Ledinskýa, J. Kočkaa
aInstitute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, CZ-162 53 Praha 6, Czech Republic (cermakj@fzu.cz)
bInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovského nám. 2, CZ-162 06 Praha 6, Czech Republic
cInstitut für Organische Chemie und Makromolekulare Chemie, Universität Jena, Humboldtstraße 10, 07743 Jena, Germany
Thin films made of polymer blends are promising for applications in photovoltaics and optoelectronics. An extended AFM study was performed on thin films made of polymer blends composed of PPV-type polymers (donor alkoxy-PPV homopolymer or copolymer and acceptor cyano-PPV derivative) or a blend of donor alkoxy-PPV polymer with σ-conjugated polymer - poly[methyl(phenyl)silanediyl] modified with a dansyl derivative (PMPSi-DNS) .
Morphology, surface potential and local conductivity of the thin blend films and also thin films of the neat polymers were studied with Dimension 3100 AFM microscope (Veeco). Material properties were characterized by inVia Reflex Raman microscope (Renishaw). Maps of local currents with high lateral resolution measured on thin films are presented and discussed. Microscopic properties are be correlated with macroscopic ones.
We would like to acknowledge the support of the Ministry of Education, Youth and Sports of the Czech Republic (grants No.1M06031 and LC06040) and of the Grant Agency of the Academy of Sciences of the Czech Republic (grant No. IAA4050409).