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Molecular beam epitaxial growth of MoSe2 on graphite, CaF2 and graphene

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journal contribution
posted on 01.12.2014, 00:00 by Suresh Vishwanath, Xinyu Liu, Sergei Rouvimov, Patrick C. Mende, Angelica Azcatl, Stephen McDonnell, Robert M. Wallace, Randall FeenstraRandall Feenstra, Jacek K. Furdyna, Debdeep Jena, Huili Grace Xing

We report the structural and optical properties of a molecular beam epitaxy (MBE) grown 2-dimensional (2D) material molybdenum diselenide (MoSe2) on graphite, CaF2 and epitaxial graphene. Extensive characterizations reveal that 2H–MoSe2 grows by van-der-Waals epitaxy on all three substrates with a preferred crystallographic orientation and a Mo:Se ratio of 1:2. Photoluminescence at room temperature (~1.56 eV) is observed in monolayer MoSe2 on both CaF2 and epitaxial graphene. The band edge absorption is very sharp,heterostructures.


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