Synthesis and characterization of carbon nanotube supported Bi2Te3 nanocrystals

Growth and transport properties of oriented bismuth telluride films

“…The ZT value can be significantly improved in low-dimensional materials owing to the effect of quantum confinement of charge carriers and phonon scattering at the boundaries and interfaces [5,6]. Several materials with special nanostructures, such as nanoplates, film, nanotubes and nanowires, have been synthesized in recently years, which show promising thermoelectric properties [7][8][9][10][11]. The greatly improved ZT value to 2.4 was first reported in Bi 2 Te 3 /Sb 2 Te 3 superlattice thin film by Venkatasubramanian et al [10].…”

Enhanced thermoelectric properties of n-type Bi2Te3-based nanocomposite fabricated by spark plasma sintering

“…Persistent efforts have been executed to improve ZT since the 1950s, especially over the last several years. Great achievements, mainly in p-type Bi 2 Te 3 -based alloys, have been made by alloying, doping and nanostructuring [4][5][6][7][8][9][10][11][12]. For example, Poudel et al synthesized p-type nanostructured BiSbTe bulk alloy by hot pressing nanopowders that were ball-milled from crystalline ingots under inert conditions, and the ZT max value reaches 1.4 at about 373 K [4].…”

Synthesis and thermoelectric properties of Zn4Sb3/Bi0.5Sb1.5Te3 bulk nanocomposites

“…Numerous researches have been performed to enhance the figure of merit, ZT = S 2 T/ (where S is the Seebeck coefficient, is the electrical resistivity, is the thermal conductivity, and T is the absolute temperature) by alloying and doping [2][3][4][5][6][7][8][9][10] since Bi 2 Te 3 -based thermoelectric materials were found in 1950s. Recent reports, however, demonstrate that low-dimensional TE materials such as p-type Bi 2 Te 3 /Sb 2 Te 3 superlattice thin films [11,12] and the nanostructured (Bi, Sb) 2 Te 3 bulk alloys [13][14][15] show a significant enhancement of their ZT mainly due to decreases of the thermal conductivity in these structures. Especially, experimental works on Bi 2 Te 3 -alloy based nanocomposites indicate that both a decrease in thermal conductivity and an increase in the power factor (S 2 / ) are possible in nanocomposite systems [16][17][18][19].…”