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Issue 7, 2018
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Nonstoichiometry induced broadband tunable photoluminescence of monolayer WSe2

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Abstract

A nonstoichiometric process by modulating the W/Se atomic ratio was employed to tune the excitonic PL band of monolayer WSe2 from 810 nm to 690 nm. DFT calculations indicate that Se-rich conditions reduce the band gap, while Se-deficient conditions facilitate the increasing band gap and decreasing excitionic binding energy, which finally induces such broadband tuning of the PL band.

Graphical abstract: Nonstoichiometry induced broadband tunable photoluminescence of monolayer WSe2

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Publication details

The article was received on 16 Oct 2017, accepted on 13 Dec 2017 and first published on 13 Dec 2017


Article type: Communication
DOI: 10.1039/C7CC07953B
Citation: Chem. Commun., 2018,54, 743-746
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    Nonstoichiometry induced broadband tunable photoluminescence of monolayer WSe2

    W. Su, Y. Li, L. Chen, D. Huo, K. Song, X. Huang and H. Shu, Chem. Commun., 2018, 54, 743
    DOI: 10.1039/C7CC07953B

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