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Proceedings Paper

Time-resolved microwave measurements of the polarizability of photoexcitons on conjugated polymer chains
Author(s): John M. Warman; Gerwin H. Gelinck; Jacob J. Piet; John W.A. Suykerbuyk; Matthijs P. de Haas; Bea M.W. Langeveld-Voss; Rene A.J. Janssen; Do-Hoon Hwang; Andrew B. Holmes; Marcus Remmers; Dieter Neher; Klaus Muellen; Peter Bauerle
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Paper Abstract

Changes as small as 1 ppm in the real and imaginary components of the complex permittivity resulting from flash photoexcitation of dilute solutions of (pi) -bond conjugated oligomers and polymers can be measured with nanosecond time resolution using the time-resolved microwave conductivity technique. The results provide information on the extent of delocalization of singlet and triplet state photoexcitations. Data are presented for oligomeric and polymeric derivatives of phenylene vinylene, paraphenylene and thiophene. For the polymers excess polarizability volumes, (Delta) Vp, of the singlet exciton of 2000, 180 and 570 angstroms3 are found, respectively. (Delta) Vp for the triplet exciton of the polythiophene derivative is found to be only 25 angstroms3.

Paper Details

Date Published: 1 December 1997
PDF: 8 pages
Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); doi: 10.1117/12.279275
Show Author Affiliations
John M. Warman, Delft Univ. of Technology (Netherlands)
Gerwin H. Gelinck, Delft Univ. of Technology (Netherlands)
Jacob J. Piet, Delft Univ. of Technology (Netherlands)
John W.A. Suykerbuyk, Delft Univ. of Technology (Netherlands)
Matthijs P. de Haas, Delft Univ. of Technology (Netherlands)
Bea M.W. Langeveld-Voss, Eindhoven Univ. of Technology (Netherlands)
Rene A.J. Janssen, Eindhoven Univ. of Technology (Netherlands)
Do-Hoon Hwang, Univ. of Cambridge (United Kingdom)
Andrew B. Holmes, Univ. of Cambridge (United Kingdom)
Marcus Remmers, Max-Planck-Institut fuer Polymerforschung (Germany)
Dieter Neher, Max-Planck-Institut fuer Polymerforschung (Germany)
Klaus Muellen, Max-Planck-Institut fuer Polymerforschung (Germany)
Peter Bauerle, Univ. Ulm (Germany)


Published in SPIE Proceedings Vol. 3145:
Optical Probes of Conjugated Polymers
Z. Valy Vardeny; Lewis J. Rothberg, Editor(s)

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