Ordered structure and high thermoelectric properties of Bi2(Te,Se)3 nanowire array

Tilt-structure and high-performance of hierarchical Bi1.5Sb0.5Te3 nanopillar arrays

“…Our previous results show that the hierarchical Sb 2 Te 3 pillar array structure can selectively scatter phonon more than carrier, leading to a high ZT value 15 . In addition, we also find that unique nanowire array structuring can induce a change of the Fermi level of the Bi 2 (Te,Se) 3 and favorably influence the phonon and carrier transport, thus dramatically enhancing a ZT result 16 . The previous studies have witnessed the feasibility of controlling novel microstructures to modify TE properties of Sb 2 Te 3 and Bi 2 Te 3 -based alloys.…”

High thermoelectric figure-of-merits from large-area porous silicon nanowire arrays

“…In semiconductor nanowires, the thermal conductivity k can be greatly reduced due to severe phonon scattering on the interfaces and boundaries of the nanowires, meanwhile, the power factor S 2 /ρ can be enhanced inherently by creating sharp features in electronic density of state [12], thus resulting in a much higher ZT value. Among various thermoelectric nanowires including Si [14][15][16][17][18][19][20][21], Ge [22], Bi [23], SiGe [24,25], InAs [26], BiTe [27,28] and PbTe [29,30] nanowires, Si nanowire (SiNW) is one of the mostly investigated TE structure due to its nontoxicity, comparatively easy synthesis, good stability under high temperature, abundant Si resource and ideal interface compatibility with Si-based electronic device. So far, there are many different types of SiNWs especially the individual one were investigated.…”

Thermal conductivity of Bi2Te3 nanowires and nanotubes

“…However, the ZT value for bulk Bi 2 Te 3 or ternary alloys is still around 1.0. Recently, a lot of studies have been conducted on the nanostructured Bi 2 Te 3 [3][4][5][6][7], like Bi 2 Te 3 nanowires. It has been proven that low dimension structures could significantly enhance thermoelectric properties [8].…”