Quantum confinement effects across two-dimensional planes in MoS2 quantum dots

Z. X. Gan; L. Z. Liu; H. Y. Wu; Y. L. Hao; Y. Shan; X. L. Wu; Paul K. Chu

doi:10.1063/1.4922551

Quantum confinement effects across two-dimensional planes in MoS₂ quantum dots

Z. X. Gan, L. Z. Liu, H. Y. Wu, Y. L. Hao, Y. Shan, X. L. Wu^*, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

216 Citations (Scopus)

179 Downloads (CityUHK Scholars)

Abstract

The low quantum yield (∼10^-5) has restricted practical use of photoluminescence (PL) from MoS₂ composed of a few layers, but the quantum confinement effects across two-dimensional planes are believed to be able to boost the PL intensity. In this work, PL from 2 to 9 nm MoS₂ quantum dots (QDs) is excluded from the solvent and the absorption and PL spectra are shown to be consistent with the size distribution. PL from MoS₂ QDs is also found to be sensitive to aggregation due to the size effect.

Original language	English
Article number	233113
Journal	Applied Physics Letters
Volume	106
Issue number	23
DOIs	https://doi.org/10.1063/1.4922551
Publication status	Published - 8 Jun 2015

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Z. X. Gan, L. Z. Liu, H. Y. Wu, Y. L. Hao, Y. Shan, X. L. Wu, and Paul K. Chu , "Quantum confinement effects across two-dimensional planes in MoS2 quantum dots", Appl. Phys. Lett. 106, 233113 (2015) and may be found at https://doi.org/10.1063/1.4922551.

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abstract = "The low quantum yield (∼10-5) has restricted practical use of photoluminescence (PL) from MoS2 composed of a few layers, but the quantum confinement effects across two-dimensional planes are believed to be able to boost the PL intensity. In this work, PL from 2 to 9 nm MoS2 quantum dots (QDs) is excluded from the solvent and the absorption and PL spectra are shown to be consistent with the size distribution. PL from MoS2 QDs is also found to be sensitive to aggregation due to the size effect.",

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AU - Gan, Z. X.

AU - Liu, L. Z.

AU - Wu, H. Y.

AU - Hao, Y. L.

AU - Shan, Y.

AU - Wu, X. L.

AU - Chu, Paul K.

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N2 - The low quantum yield (∼10-5) has restricted practical use of photoluminescence (PL) from MoS2 composed of a few layers, but the quantum confinement effects across two-dimensional planes are believed to be able to boost the PL intensity. In this work, PL from 2 to 9 nm MoS2 quantum dots (QDs) is excluded from the solvent and the absorption and PL spectra are shown to be consistent with the size distribution. PL from MoS2 QDs is also found to be sensitive to aggregation due to the size effect.

AB - The low quantum yield (∼10-5) has restricted practical use of photoluminescence (PL) from MoS2 composed of a few layers, but the quantum confinement effects across two-dimensional planes are believed to be able to boost the PL intensity. In this work, PL from 2 to 9 nm MoS2 quantum dots (QDs) is excluded from the solvent and the absorption and PL spectra are shown to be consistent with the size distribution. PL from MoS2 QDs is also found to be sensitive to aggregation due to the size effect.

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