Thermoelectric properties of new Bi-chalcogenide layered compounds

Abstract

The layered Bi-chalcogenide compounds have been drawing much attention as a new layered superconductor family since 2012. Due to the rich variation of crystal structure and constituent elements, the development of new physics and chemistry of the layered Bi-chalcogenide family and its applications as functional materials have been expected. Recently, it was revealed that the layered Bi chalcogenides can show a relatively high thermoelectric performance (ZT = 0.36 in LaOBiSSe at ~650 K). Here, we show the crystal structure variation of the Bi-chalcogenide family and their thermoelectric properties. Finally, the possible strategies for enhancing the thermoelectric performance are discussed on the basis of the experimental and the theoretical facts reviewed here.

Superconductivity in Layered Oxychalcogenide La2O2Bi3AgS6

“…4. The Seebeck coefficient is a good scale for the carrier concentration in BiS2-based compounds [30]. We observed a slight change in S by Sn substitution.…”

Promising and Eco‐Friendly Cu2X‐Based Thermoelectric Materials: Progress and Applications

“…Considering this, potential high-performance thermoelectric materials should have intermediate electrical performance with intrinsically low κ l . Traditional thermoelectric materials, such as Bi 2 Te 3 [39,[56][57][58][59][60][61][62] and PbTe, [15,30,[63][64][65][66][67][68][69][70] contain rare-earth and toxic elements. New eco-friendly and low-cost thermoelectric materials with acceptable performance are necessary.…”

“…Traditional thermoelectric materials, such as Bi 2 Te 3 and PbTe, contain rare‐earth and toxic elements. New eco‐friendly and low‐cost thermoelectric materials with acceptable performance are necessary.…”

Theoretical study of fluorine doping in layered LaOBiS2 -type compounds

“…LaOBiS 2 , 1 which comprises blocking LaO layers and conducting BiS 2 layers, has attracted much attention as superconducting [2][3][4][5][6][7][8][9][10] and thermoelectric [11][12][13][14][15][16][17][18] material. One of the remarkable features of this material is a relatively low thermal conductivity, ~2 W m -1 K -1 at room temperature, 19 which is advantageous for increasing ZT.…”