Time-resolved microwave measurements of the polarizability of photoexcitons on conjugated polymer chains

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

doi:10.1117/12.279275

1 December 1997 Time-resolved microwave measurements of the polarizability of photoexcitons on conjugated polymer chains

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

Author Affiliations +

Proceedings Volume 3145, Optical Probes of Conjugated Polymers; (1997) https://doi.org/10.1117/12.279275
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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) V_p, of the singlet exciton of 2000, 180 and 570 angstroms³ are found, respectively. (Delta) V_p for the triplet exciton of the polythiophene derivative is found to be only 25 angstroms³.

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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, and Peter Bauerle "Time-resolved microwave measurements of the polarizability of photoexcitons on conjugated polymer chains", Proc. SPIE 3145, Optical Probes of Conjugated Polymers, (1 December 1997); https://doi.org/10.1117/12.279275

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