First-principles calculations were performed to investigate the stabilities, and electronic and piezoelectric properties of Janus SnXY monolayers (X = O, S, Se, Te; Y = O, S, Se, Te; X ≠ Y).
Sn vacancies can work as an effective source for p-type conduction under both Sn- and Se-rich conditions while n-type conduction is unlikely to be realized due to the absence of the effective intrinsic source.
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