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- W2987691509 abstract "Understanding the formation and recombination dynamics between excitons and trions is critical for evaluating and improving the performance of two-dimensional material-based optoelectronic devices. Herein, we have investigated the competitive luminescence processes of intralayer excitons and trions in WS2/WSe2 heterostructures with different (0°, 30°, and 60°) twisted angles. We observed the increased photoluminescence (PL) ratio of trions compared to excitons in heterostructures with twisted angles of 30° and 60°. For a twisted angle of 30°, the relatively large PL ratio of trions is caused by the high probability of trion formation than that of excitons, while for a twisted angle of 60°, the ultrafast formation time of trions is the main reason for the trion-dominant proportion in the PL spectrum. Moreover, the power law between the excitation laser and the PL emission intensity reflects how the many-body effect affects the competition luminescence of excitons and trions. Our present results provide further understanding of the optical behaviors of intralayer excitons and trions in different twisted angle heterostructures." @default.
- W2987691509 created "2019-11-22" @default.
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- W2987691509 date "2019-11-15" @default.
- W2987691509 modified "2023-10-16" @default.
- W2987691509 title "Twisted-Angle-Dependent Optical Behaviors of Intralayer Excitons and Trions in WS<sub>2</sub>/WSe<sub>2</sub> Heterostructure" @default.
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- W2987691509 doi "https://doi.org/10.1021/acsphotonics.9b00855" @default.
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