Tungsten diselenide has outstanding performance advantages and huge market space in the future

Tungsten diselenide, with the chemical formula WSe2, appears as black-gray solid crystal or powder. The crystal has a hexagonal layered structure, which is composed of a layer of selenium atoms on the top and bottom and a layer of tungsten atoms in the middle. According to the “Tungsten Diselenide Industry In-depth Market Research and Investment Strategy Suggestions Report 2021-2025” released by the Industrial Research Center, Tungsten diselenide is stable at room temperature and pressure, has excellent electrical and optical properties, can absorb light and convert it into electrical energy, has good mechanical and magnetic properties, and has extremely low thermal conductivity. Tungsten diselenide has broad market prospects in semiconductors, optoelectronics, batteries and other fields.

The thermal conductivity of tungsten diselenide is only one hundred thousandth of that of diamond, which has the best thermal conductivity. It is the material with the lowest thermal conductivity found. Scientists from the University of Oregon in the United States found that the thermal conductivity of tungsten diselenide film is higher than that of single crystalline diselenide. Tungsten carbide is even lower. Due to its low thermal conductivity and good thermal insulation properties of tungsten diselenide, the heat energy in the system is not easily lost and the energy conversion effect is higher. Therefore, tungsten diselenide can be used in the energy field, such as the preparation of negative electrode materials for lithium ion batteries.

Using tungsten diselenide as the negative electrode material can improve the specific capacity, charge and discharge rate performance, cycle life and other properties of lithium-ion batteries. The existing negative electrode material of lithium-ion batteries is mainly graphite, but it has shortcomings such as small specific capacity and poor rate performance. In the context of the rapid development of new energy vehicles, the market has high expectations for the endurance, charge and discharge speed, and service life of lithium-ion batteries. As requirements continue to increase, graphite anode materials can no longer meet the demand. Tungsten diselenide is considered the most promising material to replace graphite anodes.

Tungsten diselenide also has good light absorption and can convert light energy into electrical energy, so it has a broad market space in the field of solar cells. Using this characteristic, tungsten diselenide can also be used in the field of photonics, in optical communications, Lasers and other fields also have broad application prospects. In 2020, a research team from the Daegu Gyeongbuk Institute of Science and Technology (DGIST) in South Korea developed a new “double resonance method” using the band characteristics of the two-dimensional material tungsten diselenide (WSe2), which can greatly improve the photon conversion of the two-dimensional material. efficiency, providing assistance for technological progress in photonics research.

Tungsten diselenide can be exfoliated to form a two-dimensional material, which is used as a semiconductor material and has a typical charge carrier density at room temperature. In 2020, a team from the Ecole Polytechnique Fédérale de Lausanne in Switzerland used two-dimensional semiconductor materials WSe2 (tungsten diselenide) and SnSe2 (tin diselenide) to form a WSe2/SnSe2 heterojunction to prepare a 2D/2D tunneling transistor at extremely low temperatures. Under voltage supply, its performance is better than that of transistors made of other two-dimensional materials, and is much higher than that of traditional transistors.

Industry analysts said that in general, tungsten diselenide has excellent properties, especially its optical and electrical properties, and its thermal properties. It has extremely low conductivity and will have broad market space in the fields of optoelectronics, semiconductor materials, lithium-ion batteries, solar cells and other fields in the future. Globally, research results on tungsten diselenide are increasing. As technology research becomes increasingly mature, its industrialization development will accelerate, and powerful companies can deploy in this field.