Bi1.8Te3Sb0.2

Bi1.8Te3Sb0.2 is a doped bismuth telluride-based thermoelectric compound in which antimony partially substitutes for bismuth in the host Bi2Te3 lattice. This p-type semiconductor is engineered for solid-state heat-to-electricity conversion and refrigeration cycles, where the Sb doping modifies the carrier concentration and Seebeck coefficient relative to undoped Bi2Te3. The material belongs to the bismuth chalcogenide family—the current benchmark for room-temperature thermoelectric applications—and is selected by engineers when optimized power factor and thermal efficiency within the 200–400 K operating window are critical, particularly in waste heat recovery and compact cooling systems where conventional alternatives prove inefficient or mechanically incompatible.