2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes
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 fo...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/58625 |
| _version_ | 1811075249639260160 |
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| author | Emelianova, E.V. Athanasopoulos, S. Silbey, Robert J. Beljonne, D. |
| author2 | Massachusetts Institute of Technology. Department of Chemistry |
| author_facet | Massachusetts Institute of Technology. Department of Chemistry Emelianova, E.V. Athanasopoulos, S. Silbey, Robert J. Beljonne, D. |
| author_sort | Emelianova, E.V. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T10:03:06Z |
| format | Article |
| id | mit-1721.1/58625 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:03:06Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/586252022-09-30T18:34:41Z 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes Emelianova, E.V. Athanasopoulos, S. Silbey, Robert J. Beljonne, D. Massachusetts Institute of Technology. Department of Chemistry Silbey, Robert J. Silbey, Robert J. 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. European Union. MODECOM (NMP3-CT-2006-016434) European Union. ONE-P (NMP3-LA-2008-212311) Fonds national de la recherche scientifique (Belgium) The Inter University Computation Center (Israel) United States. Dept. of Energy. Office of Science United States. Dept. of Energy. Office of Basic Energy United States. Dept. of Energy (Grant No DE-SC0001088) 2010-09-21T16:52:09Z 2010-09-21T16:52:09Z 2010-05 2009-09 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/58625 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. en_US http://dx.doi.org/10.1103/PhysRevLett.104.206405 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Emelianova, E.V. Athanasopoulos, S. Silbey, Robert J. Beljonne, D. 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title | 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title_full | 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title_fullStr | 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title_full_unstemmed | 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title_short | 2D Excitons as Primary Energy Carriers in Organic Crystals: The Case of Oligoacenes |
| title_sort | 2d excitons as primary energy carriers in organic crystals the case of oligoacenes |
| url | http://hdl.handle.net/1721.1/58625 |
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