High efficiency BiTe-based materials and devices for thermoelectric power generation between 100 and 300 °C

By suppressing intrinsic excitation in p-type Bi 2 Te 3 -based materials, we report maximum and average zT values of up to 1.4 and 1.2 between 100 and 300 °C, respectively. Thermoelectric modules based on these high performance materials show energy conversion efficiencies of up to 6.0% under a temperature gradient of 217 K, and are greatly superior to current Bi 2 Te 3 -based modules. High efficiency Bi 2 Te 3 -based thermoelectric materials and devices with energy conversion efficiencies of up to 6.0% under a temperature gradient of 217 K.