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Title: Nonlinear photoluminescence in atomically thin layered WSe2 arising from diffusion-assisted exciton-exciton annihilation
Authors: Mouri, Shinichiro
Miyauchi, Yuhei
Toh, Minglin
Zhao, Weijie
Eda, Goki
Matsuda, Kazunari
Keywords: DRNTU::Engineering::Materials
Issue Date: 2014
Source: 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 .
Series/Report no.: Physical review B
Abstract: 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.
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.90.155449
Rights: © 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: []. 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.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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