Thermoelectric and Transport Properties of N-Type Bi2te3 Nanocomposites

A series of Bi2Te3 nanocomposite samples have been prepared by incorporating nanoparticle concentrations of 5–50mol% into a bulk matrix via a mixing process and subsequently hot pressing into highly densified pellets. The electrical resistivity, thermopower, total thermal conductivity, carrier concentration, and Hall mobility have been measured for these composites, and the power factor, lattice thermal conductivity, and figure of merit (ZT) have been calculated. The results are discussed in light of the underlying electrical and thermal transport mechanisms.