ENHANCED THERMOELECTRIC PROPERTIES of n-Bi2Se3 AND p-Bi0.4Sb1.6Te3 SYNTHESIZED BY USING HOT-PRESS METHOD

We present the thermoelectric characteristics of bulk samples of the n-type Bi2Se3 and p-type Bi0.4Sb1.6Te3 that were produced by the vacuum melt technique and then vacuum hot-pressed at 723 and 523 K, respectively. The samples were investigated for their crystalline structure, lattice parameter, bulk density, relative density, and thermoelectric properties by XRD, density kit, ZEM-3, and LFA, respectively. In the same temperature range of 325 to 525 K, the thermoelectric characteristics of bulk n-type Bi2Se3 and p-type Bi0.4Sb1.6Te3 were higher than the literature data. The Bi2Se3 and Bi0.4Sb1.6Te3 bulk samples have maximum zT is 0.84 and 0.88 at 329 K, respectively, and are considered high-performance materials for use in thermoelectric devices.