Triplet exciton dynamics in rubrene single crystals

Aleksandr Ryasnyanskiy and Ivan Biaggio
Phys. Rev. B 84, 193203 – Published 14 November 2011

Abstract

The decay of the photoluminescence excited in rubrene single crystals by picosecond pulses is measured over 7 orders of magnitude and more than 4 time decades. We identify the typical decay dynamics due to triplet-triplet interaction. We show that singlet exciton fission and triplet fusion quantum yields in rubrene are both very large, and we directly determine a triplet exciton lifetime of 100±20 μs, which explains the delayed buildup of a large photocurrent that has been reported earlier for low excitation densities.

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  • Received 10 May 2011

DOI:https://doi.org/10.1103/PhysRevB.84.193203

©2011 American Physical Society

Authors & Affiliations

Aleksandr Ryasnyanskiy and Ivan Biaggio

  • Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015, USA

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Issue

Vol. 84, Iss. 19 — 15 November 2011

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