Microstructures and Thermoelectric Properties of Spark Plasma Sintered In4Se3

Surface termination and Schottky-barrier formation of In4Se3(001)

“…Considerable interest in In 4 Se 3 has been motivated by its thermoelectric properties [19,[22][23][24][25][26][27][28][29]. One key issue with In 4 Se 3 is that this material is much harder to cleave than materials such as TiS 3 , and the metal dichalcogenides, which can be mechanically exfoliated with ease, suggesting the adhesion is greater than for TiS 3 [2].…”

Indium Selenides: Structural Characteristics, Synthesis and Their Thermoelectric Performances

“…With regard to the synthesis, impurities are always found in In 4 Se 3 polycrystalline materials after fabrication using melting or sintering methods. [9c],[51a], The role of these impurities in the thermoelectric property of the host materials is unclear. Therefore, it is more desirable to synthesize single phase materials.…”

“…Many investigations have been carried out to explore the thermoelectric properties of In 4 Se 3 polycrystalline materials, in order to obtain isotropic thermoelectric properties and to reduce In 4 Se 3 fabrication cost. [9a‐d],, For example, Shi et al . [9c] fabricated polycrystalline In 4 Se 3 , which showed much less anisotropic thermal and electrical transport properties, with the maximum ZT of ∼0.6 along the pressing direction and of ∼0.5 perpendicular to the pressing direction at 700 K.[9c] In order to enhance the ZT of polycrystalline In 4 Se 3 , nanostructuring,[9d] Se deficiency self‐doping[9d] and Pb/Sn co‐doping[8c] have been employed, as detailed as follows.…”

Effects of stresses on the thermoelectric properties of In4Se3

“…This value is calculated using the formula ZT = S 2 sT/(k L + k e ), where S, s, T, k L , and k e represent the Seebeck coefficient, electrical conductivity, absolute temperature, and lattice and electronic thermal conductivity, respectively. [5][6][7][8][9][10] In the medium temperature range, layered In 4 Se 3 emerges as a promising n-type thermoelectric material, showing a unique layered crystal structure. This structure instigates the development of charge density waves (CDWs) and Peierls lattice distortions within the layer planes.…”