Photon-induced charge separation in molecular systems studied by time-resolved microwave conductivity: molecular optoelectric switches

John M. Warman; Stephan A. Jonker; Matthijs P. de Haas; Jan W. Verhoeven; Michael N. Paddon-Row

doi:10.1117/12.50666

1 December 1991 Photon-induced charge separation in molecular systems studied by time-resolved microwave conductivity: molecular optoelectric switches

John M. Warman, Stephan A. Jonker, Matthijs P. de Haas, Jan W. Verhoeven, Michael N. Paddon-Row

Author Affiliations +

Proceedings Volume 1559, Photopolymer Device Physics, Chemistry, and Applications II; (1991) https://doi.org/10.1117/12.50666
Event: San Diego, '91, 1991, San Diego, CA, United States

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.

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John M. Warman, Stephan A. Jonker, Matthijs P. de Haas, Jan W. Verhoeven, and Michael N. Paddon-Row "Photon-induced charge separation in molecular systems studied by time-resolved microwave conductivity: molecular optoelectric switches", Proc. SPIE 1559, Photopolymer Device Physics, Chemistry, and Applications II, (1 December 1991); https://doi.org/10.1117/12.50666

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