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. Author manuscript; available in PMC: 2020 Nov 19.
Published in final edited form as: Commun Phys. 2020;3:https://doi.org/10.1038/s42005-019-0277-7.

Fig. 3. Temperature-dependent photoluminescence (PL) of 1H-WSe2(1−x)Te2x.

Fig. 3

PL measurements (1.96 eV excitation) of a WSe2, as well as 1H-phase WSe2(1−x)Te2x alloys corresponding to b x = 0.04, c x = 0.14, d x = 0.29, and e x = 0.37. Excitation and collection are done with right circularly polarized light (σ+). The neutral exciton (X0) and trion (XT) are labeled where appropriate. Emission at 300 K is dominated by X0, which has a low-energy tail resulting from the presence of XT. As the temperature is decreased, X0 and XT sharpen and blueshift while the localized exciton features L1 and L2 begin to dominate the spectra.