ArticleThe journal of physical chemistry letters2021
Effective Negative Diffusion of Singlet Excitons in Organic Semiconductors.
Article in The journal of physical chemistry letters, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Quantum Dynamics Simulations of Polariton Transport in a Bloch Surface Wave Cavity.Nanophotonics (Berlin, Germany) · 2026Article
- An experimental perspective on symmetry breaking and the singlet fission mechanism in solid-state materials.Chemical science · 2026Review
- Spatiotemporal Exciton Tracking with a SPAD Camera.ACS photonics · 2025Article
- Structured Excitation Energy Transfer: Tracking Exciton Diffusion below Sunlight Intensity.ACS photonics · 2024Article
- Controlling Exciton Propagation in Organic Crystals through Strong Coupling to Plasmonic Nanoparticle Arrays.ACS photonics · 2022Article
- Visualizing Hot-Carrier Expansion and Cascaded Transport in WSAdvanced science (Weinheim, Baden-Wurttemberg, Germany) · 2022Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Using diffraction-limited ultrafast imaging techniques, we investigate the propagation of singlet and triplet excitons in single-crystal tetracene. Instead of an expected broadening, the distribution of singlet excitons narrows on a nanosecond time scale after photoexcitation. This narrowing results in an effective negative diffusion in which singlet excitons migrate toward the high-density region, eventually leading to a singlet exciton distribution that is smaller than the laser excitation spot. Modeling the excited-state dynamics demonstrates that the origin of the anomalous diffusion is rooted in nonlinear triplet-triplet annihilation (TTA). We anticipate that this is a general phenomenon that can be used to study exciton diffusion and nonlinear TTA rates in semiconductors relevant for organic optoelectronics.
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Registered trials
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