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 |
---|---|
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 |