Room temperature multi-phonon upconversion photoluminescence in monolayer semiconductor WS<sub>2</sub>

Room temperature multi-phonon upconversion photoluminescence in monolayer semiconductor WS2

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Two-dimensional materials show promise for photon upconversion processes due to their strong photon-exciton and phonon-exciton interactions. Here, the authors report room temperature upconversion photoluminescence in monolayer WS2 with high energy gain up to 150 meV based on variable temperature.

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