Organic redox cascades in dye sensitised solar cells

PMSE 255

Andrew B. Holmes, aholmes@unimelb.edu.au1, David J. Jones, d.jones@unimelb.edu.au1, Niels Schulte, ns283@cam.ac.uk2, Taiho Park2, Saif A Haque3, and James R. Durrant3. (1) Bio21 Institute, Department of Chemistry, University of Melbourne, Parkville, South Kensington, Melbourne, Australia, (2) Melville Laboratory, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, United Kingdom, (3) Department of Chemistry, Imperial College, London, SW7 2AZ, United Kingdom
The impact of redox potential changes on the rate of interfacial charge recombination in bilayer DSSC's has been examined.  Substitution of the p-methoxy group in poly(9,9-di(2,5,8,11-tetraoxatridec-13-yl)-2,7-diphenyl-[9H]-fluorene-alt-N,N'-bis(p-methoxyphenyl)-4,4'-diaminobiphenyl) by H-, p-fluoro, or 3,5-difluoro- increases the ploymer ionisation potention from 4.82 to 5.05 eV.  Interfacial charge recombination halftimes increase from 1.5 to 8.5 ms, indicating an increased charge separation with increasing ionisation potential.

 

Joint PMSE/POLY Poster Session
6:00 PM-8:00 PM, Tuesday, 12 September 2006 Moscone Center -- Hall D, Poster

Division of Polymeric Materials: Science & Engineering

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006