Identifying triplet pathways in dilute pentacene films
Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Nature Research
2018
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| _version_ | 1826280981792817152 |
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| author | Lubert-Perquel, D Salvadori, E Dyson, M Stavrinou, P Montis, R Nagashima, H Kobori, Y Heutz, S Kay, C |
| author_facet | Lubert-Perquel, D Salvadori, E Dyson, M Stavrinou, P Montis, R Nagashima, H Kobori, Y Heutz, S Kay, C |
| author_sort | Lubert-Perquel, D |
| collection | OXFORD |
| description | Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the pathways of the coupled triplets into free species, and their dependence on the intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel and herringbone dimers and aggregates. Using electron paramagnetic resonance spectroscopy, we provide compelling evidence for the formation of distinct quintet excitons in ambient conditions, with intrinsically distinctive electronic and kinetic properties. We find that the ability of quintets to separate into free triplets is promoted in the parallel dimers and this provides molecular design rules to control the triplets, favouring either enhanced photovoltaic efficiency (parallel) or strongly bound pairs that could be exploited for logic applications (herringbone). |
| first_indexed | 2024-03-07T00:21:53Z |
| format | Journal article |
| id | oxford-uuid:7cd5d7fd-1b62-4df5-93bc-b22cc4f8838d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:21:53Z |
| publishDate | 2018 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:7cd5d7fd-1b62-4df5-93bc-b22cc4f8838d2022-03-26T20:59:38ZIdentifying triplet pathways in dilute pentacene filmsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:7cd5d7fd-1b62-4df5-93bc-b22cc4f8838dEnglishSymplectic Elements at OxfordNature Research2018Lubert-Perquel, DSalvadori, EDyson, MStavrinou, PMontis, RNagashima, HKobori, YHeutz, SKay, CBuilding efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the pathways of the coupled triplets into free species, and their dependence on the intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel and herringbone dimers and aggregates. Using electron paramagnetic resonance spectroscopy, we provide compelling evidence for the formation of distinct quintet excitons in ambient conditions, with intrinsically distinctive electronic and kinetic properties. We find that the ability of quintets to separate into free triplets is promoted in the parallel dimers and this provides molecular design rules to control the triplets, favouring either enhanced photovoltaic efficiency (parallel) or strongly bound pairs that could be exploited for logic applications (herringbone). |
| spellingShingle | Lubert-Perquel, D Salvadori, E Dyson, M Stavrinou, P Montis, R Nagashima, H Kobori, Y Heutz, S Kay, C Identifying triplet pathways in dilute pentacene films |
| title | Identifying triplet pathways in dilute pentacene films |
| title_full | Identifying triplet pathways in dilute pentacene films |
| title_fullStr | Identifying triplet pathways in dilute pentacene films |
| title_full_unstemmed | Identifying triplet pathways in dilute pentacene films |
| title_short | Identifying triplet pathways in dilute pentacene films |
| title_sort | identifying triplet pathways in dilute pentacene films |
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