Bi2Te3, or bismuth telluride, is a compound made of bismuth and tellurium in a 2:3 ratio. It is a semiconductor known for its excellent thermoelectric properties, which allow it to convert heat into electricity and vice versa. This makes it valuable in applications like cooling systems and power generation. In addition to its thermoelectric uses, Bi2Te3 is often employed in the production of thermoelectric devices, such as Peltier coolers and thermoelectric generators. Its efficiency in these applications makes it a popular choice in both industrial and consumer electronics, contributing to energy-saving technologies.