Bismuth Selenide

Bismuth Selenide particles are an important functional material with unique physicochemical properties and a wide range of applications.

Basic Information:

Chemical formula: Bi₂Se₃, indicating that it is composed of two elements, bismuth (Bi) and selenium (Se), in the ratio of 2:3.
Molecular weight: 654.84.
CAS No.: 12068-69-8.
EINECS number: 235-104-7.
Appearance: Usually grey solid powder.
Density: relatively high, about 6.82 g/cm³.
Melting point: 710°C.
Crystal structure: It belongs to rhombohedral hexahedral crystal structure.

Chemical Properties:

Stability: it is relatively stable at room temperature and pressure, but insoluble in alkali and easily decomposed by concentrated acid and aqua regia.

Reactivity: it can react with some oxidising agents, such as oxidation reaction with oxygen at high temperature.

Application Areas:

Electronics: as a three-dimensional topological insulator, Bismuth Selenide has important applications in electronics. The existence of special electronic states on its surface, with unique electronic properties such as quantum spin Hall effect, can be used in the development of new electronic devices, such as topological insulator transistors and topological insulator spintronics devices.

Thermoelectric field: Bismuth Selenide has good thermoelectric properties, which can convert thermal energy into electrical energy, and has potential applications in fields such as thermoelectric generators, especially under high temperature conditions.

Optical field: it can be used to prepare optical devices, such as infrared detectors and optoelectronic devices. It has a good optical response in the infrared wavelength band, which makes it have certain application potential in the field of infrared optics.