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A2: Medium temperature materials

Rajeshkumar Mohanraman1* and Yang-Yuan Chen 1 
 1 Institute of Physics, Academia Sinica, Taiwan, ROC 

A maximal thermoelectric figure-of-merit ZT for p-type Ag(Sb1-xInx)Te2 samples with x = 0.07 is 1.35 at 650 K, yielding an enhancement of greater than 40% compared with that of an undoped AgSbTe2 at the same temperature.This ZT enhancement can be primarily attributed to a both greatly enhanced power factor resulting from an increase in Seebeck coefficient because of increase in the effective mass and substantial decrease in thermal conductivity which could be ascribed to enhancement of phonon scattering mechanism by dopants with different atomic weight. These results indicate that doping with In is effective for enhancing the thermoelectric performance of p-type AgSbTe2 compound.