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Single-phase SnSe thin films were prepared via thermal co-evaporation using a Se thermal cracker. By carefully tuning the stoichiometry of the SnSe, we found that the composition range of single phase SnSe is very narrow, a Se/Sn ratio of 0.95–0.99; outside of this range secondary phases (metallic Sn or SnSe2) formed. Electrical properties were found to be very sensitive to even small changes in the...
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