Non-Markovian diffusion of excitons in layered perovskites and transition metal dichalcogenides
- The diffusion of excitons in perovskites and transition metal dichalcogenides shows clear anomalous, subdiffusive behaviour in experiments. In this paper we develop a non-Markovian mobile-immobile model which provides an explanation of this behaviour through paired theoretical and simulation approaches. The simulation model is based on a random walk on a 2D lattice with randomly distributed deep traps such that the trapping time distribution involves slowly decaying power-law asymptotics. The theoretical model uses coupled diffusion and rate equations for free and trapped excitons, respectively, with an integral term responsible for trapping. The model provides a good fitting of the experimental data, thus, showing a way for quantifying the exciton diffusion dynamics.
| Author details: | Aleksandr A. KurilovichORCiD, Vladimir N. MantsevichORCiD, Yousof MardoukhiORCiDGND, Keith J. StevensonORCiDGND, Aleksei ChechkinORCiDGND, Vladimir V. PalyulinORCiD |
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| DOI: | https://doi.org/10.1039/d2cp00557c |
| ISSN: | 1463-9076 |
| ISSN: | 1463-9084 |
| Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/35621272 |
| Title of parent work (English): | Physical chemistry, chemical physics : a journal of European Chemical Societies |
| Publisher: | Royal Society of Chemistry |
| Place of publishing: | Cambridge |
| Publication type: | Article |
| Language: | English |
| Date of first publication: | 2022/05/05 |
| Publication year: | 2022 |
| Release date: | 2024/05/23 |
| Volume: | 24 |
| Issue: | 22 |
| Number of pages: | 10 |
| First page: | 13941 |
| Last Page: | 13950 |
| Funding institution: | Russian Science Foundation [18-72-10002]; Interdisciplinary Scientific; and Educational School of Moscow State University ``Photonic and Quantum; technologies; Digital medicine''; Polish National Agency for Academic; Exchange (NAWA) |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
| Peer review: | Referiert |
| License (German): |  Keine öffentliche Lizenz: Unter Urheberrechtsschutz |
