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Nano Lett. 2010 Apr 14;10(4):1271-5. doi: 10.1021/nl903868w.

Emerging photoluminescence in monolayer MoS2.

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1
Physics Department, University of California at Berkeley, Berkeley, California 94720, USA.

Abstract

Novel physical phenomena can emerge in low-dimensional nanomaterials. Bulk MoS(2), a prototypical metal dichalcogenide, is an indirect bandgap semiconductor with negligible photoluminescence. When the MoS(2) crystal is thinned to monolayer, however, a strong photoluminescence emerges, indicating an indirect to direct bandgap transition in this d-electron system. This observation shows that quantum confinement in layered d-electron materials like MoS(2) provides new opportunities for engineering the electronic structure of matter at the nanoscale.

PMID:
20229981
DOI:
10.1021/nl903868w
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