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Emerging Photoluminescence in Monolayer MoS 2

Andrea Splendiani, Liang Sun, Yuanbo Zhang, Tianshu Li, Jonghwan Kim, Chi Yung Chim, Giulia Galli, Feng Wang

Nano Letters · 2010 · 9,530 citations

doi.org/10.1021/nl903868w

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.

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Splendiani, A., Sun, L., Zhang, Y., Li, T., Kim, J., Chim, C. Y., Galli, G., & Wang, F. (2010). Emerging photoluminescence in monolayer MoS 2. Nano Letters, 10(4), 1271–1275. https://doi.org/10.1021/nl903868w

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