Tuesday, March 5, 2024
Google search engine
HomeAnswerApplications of Monolayer MoS2

Applications of Monolayer MoS2

MoS2 has been intensively studied for almost ten years, and many potential applications have been investigated. Below is a selection of these. Field-effect transistors: The large direct bandgap and relatively high carrier mobility in MoS2 make it an obvious choice for FETs. Early experiments on single-layer MoS2 transistors showed great promise, with recorded mobilities of 200 cm2V-1s-1 and an on/off ratio of ~108. It has been suggested that such devices may outperform silicon-based FETs in several key metrics, such as power efficiency and on/off ratio. However, they tend to show only n-type characteristics. Much effort has been applied to refining FETs by reducing substrate interactions, improving electrical injection, and realizing ambipolar transport. Photodetectors: The bandgap properties of MoS2 also lend themselves to optoelectronic applications. A device fabricated from an exfoliated flake with sensitivity 880 AW-1 and broadband photoresponse (400-680nm) was first demonstrated five years ago. Combining graphene into a monolayer heterostructure enhanced sensitivity by a factor of 104. Solar cells: Monolayer MoS2 has visible optical absorption that is an order of magnitude greater than silicon, making it a promising solar cell material. When combined with monolayer WS2 or graphene, power conversion efficiencies of ~1% have been recorded. While these efficiencies appear low, the active area of such devices only has a thickness of ~1 nanometer (compared to 100’s micrometers for silicon cells), corresponding to a 104 times increase in power density. A type-II heterojunction cell consisting of CVD-grown monolayer MoS2 and p-doped silicon has shown a PCE of over 5%. Chemical sensors: The photoluminescence (PL) intensity of monolayer MoS2 highly depends on the physical adsorption of water and oxygen onto its surface. Electron transfer from the n-type monolayer to gas molecules stabilizes excitons and increases the PL intensity by up to 100 times. Other studies on the electrical properties of FET structures have shown that monolayer-based sensors are unstable when detecting NO, NO2, NH3, and humidity. Still, the operation can be stabilized by using a few layers. Sensitivities of <1ppm have been recorded for the case of NO. If you are looking for high quality, high purity, and cost-effective Molybdenum disulfide, or if you require the latest price of Molybdenum disulfide, please feel free to email contact mis-asia.

- Advertisment -
Google search engine

Most Popular

Recent Comments