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Proceedings Paper

Photon-induced charge separation in molecular systems studied by time-resolved microwave conductivity: molecular optoelectric switches
Author(s): John M. Warman; Stephan A. Jonker; Matthijs P. de Haas; Jan W. Verhoeven; Michael N. Paddon-Row
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Paper Abstract

Using the TRMC technique, small transient changes in the microwave conductivity (dielectric loss) of a medium that occur on laser flash-photolysis can be monitored with nanosecond time- resolution. The method is described. Its application is illustrated with results on photo-induced charge separation in the singlet and triplet excited states of dilute solutions of donor-spacer- acceptor molecules. Both conjugated $PI-bond and nonconjugated (sigma) -bond spacers have been investigated. Particular attention is paid to the extension of the lifetime of the highly dipolar excited states formed on photolysis either by the formation of metastable triplet states or by intramolecular `through-bond' electron tunneling. The results could be relevant to the design of molecular optoelectric devices.

Paper Details

Date Published: 1 December 1991
PDF: 12 pages
Proc. SPIE 1559, Photopolymer Device Physics, Chemistry, and Applications II, (1 December 1991);
Show Author Affiliations
John M. Warman, Delft Univ. of Technology (Netherlands)
Stephan A. Jonker, Delft Univ. of Technology (Netherlands)
Matthijs P. de Haas, Delft Univ. of Technology (Netherlands)
Jan W. Verhoeven, Univ. of Amsterdam (Netherlands)
Michael N. Paddon-Row, Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 1559:
Photopolymer Device Physics, Chemistry, and Applications II
Roger A. Lessard, Editor(s)

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