Antimony(III) telluride is primarily used in the field of thermoelectric materials. It is a key component in the production of thermoelectric devices, which convert heat energy into electrical energy. This compound is valued for its ability to efficiently conduct electricity while minimizing heat conduction, making it ideal for applications in power generation from waste heat, such as in industrial processes or automotive exhaust systems. Additionally, it is utilized in cooling systems, where it helps in creating compact and efficient thermoelectric coolers for electronic devices and refrigeration units. Its properties also make it suitable for use in infrared detectors and other optoelectronic applications.