Geminate exciton fusion fluorescence as a probe of triplet exciton transport after singlet fission

Wolf, Eric A.; Biaggio, Ivan

doi:10.1103/physrevb.103.l201201

Geminate exciton fusion fluorescence as a probe of triplet exciton transport after singlet fission

Journal Article · Thu May 06 00:00:00 EDT 2021 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.103.l201201· OSTI ID:1782485

Wolf, Eric A. ^[1]; ^[2]

Lehigh Univ., Bethlehem, PA (United States); Lehigh University
Lehigh Univ., Bethlehem, PA (United States)

The geminate annihilation of two triplet excitons created by singlet exciton fission is affected by the dimensionality of transport as determined by typically anisotropic triplet exciton mobilities in organic molecular crystals. We analyze this process using a random-walk model where the time dynamics of the geminate annihilation probability is determined by the average exciton hopping times along the crystallographic directions. Here, the model is then applied to the geminate fluorescence dynamics in rubrene, where the main channel for triplet-triplet annihilation is via triplet fusion and subsequent photon emission, and we identify the transitions between transport in one, two, and three dimensions.

View Accepted Manuscript (DOE)

Research Organization:: Lehigh Univ., Bethlehem, PA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division

Grant/Contract Number:: SC0020981

OSTI ID:: 1782485

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 20 Vol. 103; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Geminate exciton fusion fluorescence as a probe of triplet exciton transport after singlet fission

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