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Photoluminescence Quenching in Single-Layer MoS2 via Oxygen Plasma Treatment
Open accessAbstract
By creating defects via oxygen plasma treatment, we demonstrate optical properties variation of single-layer MoS 2 . We found that, with increasing plasma exposure time, the photoluminescence (PL) evolves from very high intensity to complete quenching, accompanied by gradual reduction and broadening of MoS 2 Raman modes, indicative of distortion of the MoS 2 lattice after oxygen bombardment. X-ray photoelectron spectroscopy study shows the appearance of the Mo 6+ peak, suggesting the creation of MoO 3 disordered regions in the MoS 2 flake. Finally, using band structure calculations, we demonstrate that the creation of MoO 3 disordered domains upon exposure to oxygen plasma leads to a direct-to-indirect bandgap transition in single-layer MoS 2, which explains the observed PL quenching.
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Cites
Electronics and optoelectronics of two-dimensional transition metal dichalcogenides
Wang, Q. H., Kalantar-Zadeh, K., Kis, A., Coleman, J. N., & Strano, M. S. (2012) · Nature Nanotechnology · doi:10.1038/nnano.2012.193 · Cited by 16,374
The chemistry of two-dimensional layered transition metal dichalcogenide nanosheets
Chhowalla, M., Shin, H. S., Eda, G., Li, L.-J., Loh, K. P., & Zhang, H. (2013) · Nature Chemistry · doi:10.1038/nchem.1589 · Cited by 10,034
Cited by
Defect-Induced Photoluminescence in Monolayer Semiconducting Transition Metal Dichalcogenides
Chow, P. K., Jacobs-Gedrim, R. B., Gao, J., Lu, T.-M., Yu, B., Terrones, H., & Koratkar, N. (2015) · ACS Nano · doi:10.1021/nn5073495 · Cited by 482
Samadi, M., Sarikhani, N., Zirak, M., Zhang, H., Zhang, H.-L., & Moshfegh, A. Z. (2018) · Nanoscale Horizons · doi:10.1039/c7nh00137a · Cited by 408
Self-Limiting Layer-by-Layer Oxidation of Atomically Thin WSe2
Yamamoto, M., Dutta, S., Aikawa, S., Nakaharai, S., Wakabayashi, K., Fuhrer, M. S., Ueno, K., & Tsukagoshi, K. (2015) · Nano Letters · doi:10.1021/nl5049753 · Cited by 258
Metadata
- Authors
- Kang, N., Paudel, H. P., Leuenberger, M. N., Tetard, L., & Khondaker, S. I.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2014-08-28
- Volume
- 118
- Issue
- 36
- Pages
- 21258-21263
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2962878147
- Cited by
- 288
- References
- 2
- FWCI
- 9.08
- Type
- journal article
- Language
- en
- Open access
- green
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- Kang, N., Paudel, H. P., Leuenberger, M. N., Tetard, L., & Khondaker, S. I. (2014). Photoluminescence Quenching in Single-Layer MoS2 via Oxygen Plasma Treatment. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp506964m
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