Like molybdenum disulfide semiconductor material, tungsten diselenide (WSe2) is also a typical transition metal semiconductor material. It is widely used because of its excellent electrical and optical properties and high quantum yield. Popular with solar cell researchers.
A solar cell is an optoelectronic semiconductor sheet that uses sunlight to directly generate electricity. It is often manufactured using silicon wafers. However, solar cells made of crystalline silicon are not only large in size and weight, but also have average photoelectric conversion efficiency. Therefore, researchers urgently need to find a replacement for silicon wafers.
Thanks to the emergence of tungsten diselenide semiconductor material, it has become possible to put lightweight flexible solar cells into practical use. According to researchers, WSe2 is an inorganic compound composed of an upper and lower layer of selenium atoms connected to a middle layer of tungsten atoms. It can absorb solar rays like graphene and convert the absorbed solar rays into electricity.
Since the thickness of the WSe2 battery is extremely small, about 95% of the light can pass through it, which means that the other 5% of the light may be converted into electricity, making the photoelectric conversion of this battery Very efficient.
Extended information:
Tungsten diselenide is a black or gray solid powder that is often prepared by magnetron sputtering and chemical deposition. In addition to being used in photovoltaic equipment At home and abroad, it can also be used in ultra-thin LED lamps and can even be used as an additive for lubricants. The reason why it is used in the field of optoelectronics is mainly because WSe2 has a band gap of 1.35 eV and has good optical properties and physical and chemical stability; the reason why it is used in the field of lubricants is mainly because WSe2 is a low-dimensional layer Shape structure material with small friction coefficient.