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We present a series of investigations on the intermediate timescale dynamics of geminate triplet exciton pairs in rubrene single crystals. In particular, we report the observation of quantum beats — GHz-timescale oscillations produced by energy splittings — in the photoluminescence of rubrene crystals [7], indicating coherence between triplet pairs which lasts at least 40 ns at room temperature. Additionally, we present long-timescale (up to 10 ? s) measurements of the PL dynamics of rubrene without a contribution from nongeminate triplet fusion; these measurements provide support for a random walk model of triplet diffusion and demonstrate a transition in this diffusion's dimensionality on a timescale of ? ? 2?s.
Full Title
Geminate Triplet Exciton Dynamics in Rubrene Single Crystals
Member of
Contributor(s)
Creator: Wolf, Eric
Department: Physics
Publisher
Lehigh University
Date Issued
2020-05-18
Language
English
Type
Genre
Form
electronic documents
Department name
Physics
Media type
Subject (LCSH)
Keywords
Date Other
2020
Wolf, Eric. (2020). Geminate Triplet Exciton Dynamics in Rubrene Single Crystals (1–). https://preserve.lehigh.edu/lehigh-scholarship/undergraduate-publications/eckardt-scholars/geminate-triplet-exciton-dynamics
Wolf, Eric. 2020. “Geminate Triplet Exciton Dynamics in Rubrene Single Crystals”. https://preserve.lehigh.edu/lehigh-scholarship/undergraduate-publications/eckardt-scholars/geminate-triplet-exciton-dynamics.
Wolf, Eric. Geminate Triplet Exciton Dynamics in Rubrene Single Crystals. 18 May 2020, https://preserve.lehigh.edu/lehigh-scholarship/undergraduate-publications/eckardt-scholars/geminate-triplet-exciton-dynamics.