Tunable Photoluminescence of Monolayer MoS2 via Chemical Doping

We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity but reduced by the adsorption of n-type dopants. This PL modulation...

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Veröffentlicht in:	Nano letters 2013-12, Vol.13 (12), p.5944-5948
Hauptverfasser:	Mouri, Shinichiro, Miyauchi, Yuhei, Matsuda, Kazunari
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science rheology Disulfides - chemistry Electron states Exact sciences and technology Excitons and related phenomena Growth from solutions Luminescence Materials science Methods of crystal growth physics of crystal growth Molybdenum - chemistry Nanostructures - chemistry Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures Optics and Photonics Particle Size Physics Solid surfaces and solid-solid interfaces Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	We demonstrate the tunability of the photoluminescence (PL) properties of monolayer (1L)-MoS2 via chemical doping. The PL intensity of 1L-MoS2 was drastically enhanced by the adsorption of p-type dopants with high electron affinity but reduced by the adsorption of n-type dopants. This PL modulation results from switching between exciton PL and trion PL depending on carrier density in 1L-MoS2. Achievement of the extraction and injection of carriers in 1L-MoS2 by this solution-based chemical doping method enables convenient control of optical and electrical properties of atomically thin MoS2.
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl403036h