Tracking Triplet Dissociation using Microwave Conductivity
Garry Rumbles a
a Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States
Proceedings of International Conference on Advances in Organic and Hybrid Electronic Materials (AOHM19)
Dubrovnik, Croatia, 2019 March 17th - 20th
Organizers: Alejandro Briseno, Thuc-Quyen Nguyen and Natalie Stingelin
Invited Speaker, Garry Rumbles, presentation 050
DOI: https://doi.org/10.29363/nanoge.aohm.2019.050
Publication date: 8th January 2019

Flash photolysis, time-resolved microwave conductivity (fp-TRMC) is an ideal spectroscopic tool for the detection of free, mobile charges in molecular and polymeric thin films, where the inherent sensitivity enables the detection of charge carriers that have extremely low carrier mobilities. This presentation will examine the dissociation of triplet states into separated carriers using low concentrations of acceptor molecules dispersed into the thin films. An investigation of the dependence of driving force on the yield of free carriers generated from triplet states produced from a singlet fission process in thin films of pentacene. The yield from these studies suggests an optimum driving force consistent with a Marcus formulation of photo-induced electron transfer, although the peak yield appears lower than expected.

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