Journal
ACS NANO
Volume 8, Issue 11, Pages 11147-11153Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn5034746
Keywords
transition metal dichalcogenide; CVD; molybdenum disulfide; tungsten diselenide; ultrafast; terahertz conductivity; photoluminescence
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Funding
- EPSRC (UK)
- Academia Sinica (IAMS)
- Academia Sinica (Nano program)
- National Science Council Taiwan [NSC-99-2112-M-001-021-MY3]
- EPSRC [EP/H016368/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H016368/1] Funding Source: researchfish
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We have measured ultrafast charge carrier dynamics in monolayers and trilayers of the transition metal dichalcogenides MoS2 and WSe2 using a combination of time-resolved photoluminescence and terahertz spectroscopy. We recorded a photoconductivity and photoluminescence response time of just 350 fs from CVD-grown monolayer MoS2, and 1 ps from trilayer MoS2 and monolayer WSe2. Our results indicate the potential of these materials as high-speed optoelectronic materials.
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