Journal
NANO LETTERS
Volume 13, Issue 12, Pages 5944-5948Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl403036h
Keywords
Molybdenum disulfide; 2D semiconductors; photoluminescence; excitons; transition metal dichalcogenide; chemical doping
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Funding
- MEXT of Japan [22740195, 25400324, 24681031, 23340085, 25610074]
- PRESTO from JST
- Grants-in-Aid for Scientific Research [24681031, 22740195, 25610074, 23340085] Funding Source: KAKEN
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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.
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