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Cited by 249

The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Electron-Doping-Enhanced Trion Formation in Monolayer Molybdenum Disulfide Functionalized with Cesium Carbonate

Lin, Jia Dan, Han, Cheng, Wang, Fei, Wang, Rui, Xiang, Du, Qin, Shiqiao, Zhang, Xue-Ao, Wang, Li, Zhang, Hua, Wee, Andrew Thye Shen, Chen, Wei·2014·ACS Nano

Abstract

We report effective and stable electron doping of monolayer molybdenum disulfide (MoS2) by cesium carbonate (Cs2CO3) surface functionalization. The electron charge carrier concentration in exfoliated monolayer MoS2 can be increased by about 9 times after Cs2CO3 functionalization. The n-type doping effect was evaluated by in situ transport measurements of MoS2 field-effect transistors (FETs) and further corroborated by in situ ultraviolet photoelectron spectroscopy, X-ray photoelectron spectroscopy, and Raman scattering measurements. The electron doping enhances the formation of negative trions (i.e., a quasiparticle comprising two electrons and one hole) in monolayer MoS2 under light irradiation and significantly reduces the charge recombination of photoexcited electron-hole pairs. This results in large photoluminescence suppression and an obvious photocurrent enhancement in monolayer MoS2 FETs.

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Metadata

Authors
Lin, J. D., Han, C., Wang, F., Wang, R., Xiang, D., Qin, S., Zhang, X.-A., Wang, L., Zhang, H., Wee, A. T. S., & Chen, W.
Venue
ACS Nano
Published
2014-05-01
Volume
8
Issue
5
Pages
5323-5329
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2318439217
Cited by
249
References
4
FWCI
12.36
Type
journal article
Language
en
Open access
closed

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