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

J.M. Warman, G.H. Gelinck, J.J. Piet, J.W. Suykerbuyk, M.P. Haas, de, B.M.W. Langeveld-Voss, R.A.J. Janssen, D.-H Hwang, A.B. Holmes, M. Remmers, D. Neher, K. Müllen, P. Baeuerle

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Samenvatting

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.
Originele taal-2Engels
TitelOptical Probes of Conjugated Polymers, San Diego, CA, United States, July 27, 1997
RedacteurenZ.V. Vardeny, l..J. Rothberg
Plaats van productieBellingham
UitgeverijSPIE
Pagina's142-149
DOI's
StatusGepubliceerd - 1997

Publicatie series

NaamProceedings of SPIE
Volume3145
ISSN van geprinte versie0277-786X

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Warman, J. M., Gelinck, G. H., Piet, J. J., Suykerbuyk, J. W., Haas, de, M. P., Langeveld-Voss, B. M. W., ... Baeuerle, P. (1997). Time-resolved microwave measurements of the polarizability of photoexcitations on conjugated polymer chains. In Z. V. Vardeny, & L. J. Rothberg (editors), Optical Probes of Conjugated Polymers, San Diego, CA, United States, July 27, 1997 (blz. 142-149). (Proceedings of SPIE; Vol. 3145). Bellingham: SPIE. https://doi.org/10.1117/12.279275