2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes
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Emelianova-2010-2D Excitons as Prima.pdf
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Author(s)
Emelianova, E.V.
Athanasopoulos, S.
Silbey, Robert J.
Beljonne, D.
Date Issued
May 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Emelianova, E.V. et al. "2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes." Physical Review Letters 104.20 (2010): 206405. © 2010 The American Physical Society.
Version
Final published version
Abstract
A number of organic crystals show anisotropic excitonic couplings, with weak interlayer interactions between molecules that are more strongly coupled within the layers. The resulting energy carriers are intralayer 2D excitons that diffuse along the interlayer direction. We model this analytically for infinite layers and using quantum-chemical calculations of the electronic couplings for anthracene clusters. We show that the exciton hopping rates and diffusion lengths depend in a subtle manner on the size and shape of the interacting aggregates, temperature, and the presence of energetic disorder.
MIT Department
Massachusetts Institute of Technology. Department of Chemistry
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.104.206405
