ArticleChemical science2019
Singlet fission in a hexacene dimer: energetics dictate dynamics.
Article in Chemical science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 56 citations in OpenAlex.
- The Lowest Excited State of Heptacenes Is Dark.The journal of physical chemistry letters · 2025Article
- Exploring the chemistry of higher acenes: from synthesis to applications.Chemical science · 2025Review
- Enhanced Circularly Polarized Green Luminescence Metrics from New Enantiopure BinaryMolecules (Basel, Switzerland) · 2024Article
- Promoting multiexciton interactions in singlet fission and triplet fusion upconversion dendrimers.Nature communications · 2023Article
- Inverse Design of Tetracene Polymorphs with Enhanced Singlet Fission Performance by Property-Based Genetic Algorithm Optimization.Chemistry of materials : a publication of the American Chemical Society · 2023Article
- Not dark yet for strong light-matter coupling to accelerate singlet fission dynamics.Cell reports. Physical science · 2022Article
- Conversion between triplet pair states is controlled by molecular coupling in pentadithiophene thin films.Chemical science · 2020Article
Corrections and comments
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Singlet fission (SF) is an exciton multiplication process with the potential to raise the efficiency limit of single junction solar cells from 33% to up to 45%. Most chromophores generally undergo SF as solid-state crystals. However, when such molecules are covalently coupled, the dimers can be used as model systems to study fundamental photophysical dynamics where a singlet exciton splits into two triplet excitons within individual molecules. Here we report the synthesis and photophysical characterization of singlet fission of a hexacene dimer. Comparing the hexacene dimer to analogous tetracene and pentacene dimers reveals that excess exoergicity slows down singlet fission, similar to what is observed in molecular crystals. Conversely, the lower triplet energy of hexacene results in an increase in the rate of triplet pair recombination, following the energy gap law for radiationless transitions. These results point to design rules for singlet fission chromophores: the energy gap between singlet and triplet pair should be minimal, and the gap between triplet pair and ground state should be large.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.