Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation
We studied multiexciton dynamics in monolayer WSe2 using nonlinear photoluminescence (PL) spectroscopy and Monte Carlo simulations. We observed strong nonlinear saturation behavior of exciton PL with increasing excitation power density and long-distance exciton diffusion, reaching several micrometer...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/102413 http://hdl.handle.net/10220/24269 |
| _version_ | 1811687261686726656 |
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| author | Mouri, Shinichiro Miyauchi, Yuhei Toh, Minglin Zhao, Weijie Eda, Goki Matsuda, Kazunari |
| author2 | School of Materials Science & Engineering |
| author_facet | School of Materials Science & Engineering Mouri, Shinichiro Miyauchi, Yuhei Toh, Minglin Zhao, Weijie Eda, Goki Matsuda, Kazunari |
| author_sort | Mouri, Shinichiro |
| collection | NTU |
| description | We studied multiexciton dynamics in monolayer WSe2 using nonlinear photoluminescence (PL) spectroscopy and Monte Carlo simulations. We observed strong nonlinear saturation behavior of exciton PL with increasing excitation power density and long-distance exciton diffusion, reaching several micrometers. We demonstrated that the diffusion-assisted exciton-exciton annihilation (EEA) model accounts for the observed nonlinear PL behavior. The long-distance exciton diffusion and subsequent efficient EEA process determined the unusual multiexciton dynamics in atomically thin layered transition metal dichalcogenides. |
| first_indexed | 2024-10-01T05:13:30Z |
| format | Journal Article |
| id | ntu-10356/102413 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:13:30Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1024132023-07-14T15:46:10Z Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation Mouri, Shinichiro Miyauchi, Yuhei Toh, Minglin Zhao, Weijie Eda, Goki Matsuda, Kazunari School of Materials Science & Engineering DRNTU::Engineering::Materials We studied multiexciton dynamics in monolayer WSe2 using nonlinear photoluminescence (PL) spectroscopy and Monte Carlo simulations. We observed strong nonlinear saturation behavior of exciton PL with increasing excitation power density and long-distance exciton diffusion, reaching several micrometers. We demonstrated that the diffusion-assisted exciton-exciton annihilation (EEA) model accounts for the observed nonlinear PL behavior. The long-distance exciton diffusion and subsequent efficient EEA process determined the unusual multiexciton dynamics in atomically thin layered transition metal dichalcogenides. Published version 2014-12-01T05:16:54Z 2019-12-06T20:54:33Z 2014-12-01T05:16:54Z 2019-12-06T20:54:33Z 2014 2014 Journal Article Mouri, S., Miyauchi, Y., Toh, M., Zhao, W., Eda, G., & Matsuda, K. (2014). Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation. Physical review B, 90(15),155449,1-5 . 1098-0121 https://hdl.handle.net/10356/102413 http://hdl.handle.net/10220/24269 10.1103/PhysRevB.90.155449 en Physical review B © 2014 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: [http://dx.doi.org/10.1103/PhysRevB.90.155449]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 5 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials Mouri, Shinichiro Miyauchi, Yuhei Toh, Minglin Zhao, Weijie Eda, Goki Matsuda, Kazunari Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title | Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title_full | Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title_fullStr | Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title_full_unstemmed | Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title_short | Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation |
| title_sort | nonlinear photoluminescence in atomically thin layered wse2 arising from diffusion assisted exciton exciton annihilation |
| topic | DRNTU::Engineering::Materials |
| url | https://hdl.handle.net/10356/102413 http://hdl.handle.net/10220/24269 |
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