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Semiconductor Molybdenum disulfide

It is not a good semiconductor. Chemists, materials scientists and others are looking for alternatives to graphene. They are synthesizing other two-dimensional flakes that are flexible and transparent with electronic properties that graphene is unable to match.


Molybdenum disulfide


This is one.


Molybdenum disulfide Overview


Molybdenum diulfide, a TMD (transition metal disulfide material), was synthesized in 2008. The name is the structure of these materials: a molybdenum-containing transition metal atom and a pair atoms, including selenium and sulfur from column 16, of the periodic chart.

TMDs are all semiconductors. This is a surprise to electronics manufacturers. The TMDs are about the same thickness as graphene.


molybdenum disulfide


They also have other benefits. One of the main advantages for molybdenum is its electron mobility, or the speed with which electrons move in a flat sheet. The electron migration of molybdenum is 100 cm2/vs. (That is, 100 electrons/square centimeter/volt second). This is significantly lower than that of crystalline silica, which is around 1400 cm2/vs. However, it is thinner than other materials such as amorphous silicone. Scientists study semiconductors to use them in future products like flexible display screens or other electronic devices that can be stretched.


Research on Molybdenum diulfide


Even for large pieces of materials in two dimensions, studies have shown molybdenum diulfide to be extremely easy-to-make. This allows engineers the ability to test electronic products quickly.

In 2011, a research team led by Andras Kis of the Swiss Federal Institute of Technology published an article in “Nature-Nanotechnology”, saying that they used a single layer of molybdenum disulfide thin-film of only 0.65 nanometers to make the first transistors. The products of the first generation and their subsequent versions have many unique features that distinguish them from more technologically advanced silicon-based products.

Molybdenum diulfide also has some other desirable properties. One of them is the direct bandgap. It allows it to convert electrons in photons or vice versa. This property also makes molybdenum a good candidate to be used in optical devices like light emitters. lasers. photodetectors and even solar cell. Yi-Hsien says that because this material has abundant reserves, is non-toxic, and low-priced, its future looks bright. Tomanek however believes that the rate of electron migration is higher than what Tomanek claims.


molybdenum disulfide


This is still not enough. In a crowded electronic market, it’s difficult to maintain a competitive edge. The structural characteristics of the material are to blame. It is because electrons will bounce when they come into contact with larger metals atoms. Scientists believe this “stumblingblock” is only temporary. Researchers are working to overcome this obstacle by making a multilayer sheet of molybdenum sulfide that is slightly thicker.





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Molybdenum disulfide


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