Effect of different surfactants on thermoelectric properties of CuS nanoparticles

Improved Thermoelectric Figure of Merit in Polyol Method-Prepared Cu1–xBixS (x ≤ 0.06) Nanosheets

“…Among them, only 14 modes, i.e., Γ Raman = 2A 1g + 4E 2g + 2E 1g , are Raman active, which can be categorized as Γ Cu1 = A 1g + E 2g + E 1g and Γ Cu2 = E 2g for Cu and Γ S1 = A 1g + E 2g + E 1g and Γ S2 = E 2g for S. 33 A sharp peak detected at 473.8 cm −1 corresponds to the S−S stretching vibrational mode of the A 1g symmetry of the S 2 atoms at the 4e sites. 22 When the potential was increased in the region where covellite CuS is generated, the S−S stretch band was the main characteristic of the spectrum from the surface. This sharp peak indicates the arrangement of the regular patterns of the lattice atoms.…”

“…Copper vacancies present in CuS act as a p-type I–VI semiconductor with an energy band gap in the range of 1.55–2.15 eV and CuS turns to Cu 2– x S above 507 K . It has great potential with a vast range of uses such as solar cells, photocatalytic activities, solid-state batteries, conductive fibers, and thermoelectric materials. , …”

“…Therefore, different types of CuS NPs in different shapes as nanotubes, hollow spheres, nanoplates, nanowires, and nanorods have been synthesized using polyol, solvothermal, sonochemical, solid-state synthesis, and hydrothermal methods. However, reports on thermoelectric properties are scarce.…”

“…Among these, CuS attracts special attention due to its low cost, low toxicity, metal-like behavior down to 5 K, and electrical resistance 6 times smaller than that of Cu 2 S. 16 Copper vacancies present in CuS act as a p-type I−VI semiconductor with an energy band gap in the range of 1.55− 2.15 eV 3 and CuS turns to Cu 2−x S above 507 K. 17 It has great potential with a vast range of uses such as solar cells, 18 photocatalytic activities, 19 solid-state batteries, 20 conductive fibers, 21 and thermoelectric materials. 3,22 Therefore, different types of CuS NPs in different shapes as nanotubes, 23 hollow spheres, 24 nanoplates, 16 nanowires, 25 and nanorods 26 have been synthesized using polyol, 22 solvothermal, 24 sonochemical, 27 solid-state synthesis, 26 and hydrothermal 28 methods. However, reports on thermoelectric properties are scarce.…”

Experimental Study of Electric Power Generation with Concentrated Solar Thermoelectric Generator

“…They used this material in a thermoelectric application under different temperature gradients, and they conducted tests at temperatures between 20 • C and 100 • C. The obtained results showed a decrease in both mechanical properties with increasing temperature. Mukherjee et al [15] inspected the thermoelectric properties of CuS nanoparticles synthesized with a simple polyol-based method using CTAB and PVP as surfactants. They noted that the presence of surfactants during the synthesis of CuS nanoparticles seemed to prevent the volatility of sulfur, which caused the capped samples to become S-rich and, thus, improved the electrical conductivity and thermal power.…”