Perfluoroheterofluorene containing donor-acceptor oligomers

ORGN 498

Katharine Geramita, geramita@berkeley.edu, Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720 and T. Don Tilley, tdtilley@berkeley.edu, Department of Chemistry, UC Berkeley, Berkeley, CA 94720.
In the drive to produce efficient yet inexpensive photovoltaics (PVs), the use of organic semiconducting materials offer an attractive pathway to reducing raw material and processing costs. Currently blends of p- and n-type compounds offers the best overall device performance for organic PVs, however undesired phase separation often contributes to reduced system output. Prevention of this phase separation might be achieved by the introduction of alternative n-type components which would be more compatible with typical p-type materials. To this end a series of perfluorinated heterofluorene oligomers were synthesized via a combination of nucleophilic aromatic substitution and palladium coupling techniques which exhibited low reduction potentials and cofacial stacking in the solid state. Electron deficient perfluoroheterofluorene oligomers were also coupled with electron rich oligothiophenes and the resulting donor-acceptor systems were characterized in both the solution and solid state.
 

Materials, Devices and Switches
1:00 PM-4:40 PM, Wednesday, April 9, 2008 Morial Convention Center -- La Nouvelle, Blrm. C, Oral

Division of Organic Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008