Growth of CuSbS₂ Single Crystal as an Environmentally Friendly Thermoelectric Material

Abstract

High‐quality p‐type chalcostibite CuSbS2 single crystal is successfully synthesized by zone melting method for investigating fundamental properties. The grown crystal is orthorhombic structure and nearly stoichiometric with slightly Cu‐rich composition. The electrical properties are the hole concentration of 8.0 × 1016 cm−3, conductivity of 0.8 S cm−1, and mobility of 65 cm2 V−1 s−1 by Hall effect measurement at room temperature. Intrinsic low thermal conductivity in CuSbS2 single crystal is 0.9 W mK−1 at room temperature, which is an advantage of thermoelectric material. These results indicate that CuSbS2 has potential as an environmentally friendly high performance thermoelectric material and provide references for the results of characterization on polycrystalline samples.

Intermetallic Compound Cu2Sb Nanoparticles for Effective Electrocatalytic Oxidation of an Antibiotic Drug: Sulphadiazine

“…Furthermore, Raman spectroscopy was performed to confirm the structural characterization and phase identification of intermetallic compounds. The Cu 2 Sb single-crystal nanoparticle exhibited several distinct peaks at 133.91, 184.42, and 243.35 cm –1 , which are shown in the Raman spectrum in Figure B. − The peaks corresponding to 133.91 and 184.42 cm –1 exhibited due to the rocking and stretching vibration of compounds Cu–Sb and Sb–Sb. Similarly, the 243.35 cm –1 peaks belong to the E 2g band, in consistence with previously reported Cu 2 Sb bands.…”

Chalcostibite Single-Crystal CuSbS₂ as High-Performance Thermoelectric Material

“…CuSbS 2 single crystals were grown from its feed polycrystalline by the zone melting method at a growth temperature of 600°C, the temperature gradient of 40°C/cm, and growth speed of 4 mm/day as previously reported. 15) The grown crystals were cut with a diamond blade, polished mechanically with a 0.01 µm Al 2 O 3 paste, and then etched with a 5% Br 2 / Methanol solution for 5 min. TE measurements were carried out along the c-axis because the sample size in other directions was too small for measurements.…”

“…We focused on a chalcostibite CuSbS 2 single crystal as an environmentally friendly TE material because of its stable orthorhombic structure until reaching the melting point, as well its characteristically low thermal conductivity <1.0 W/mK. 15) We have reported that the CuSbS 2 single crystals were grown using the zone-melting method at 600°C, and its TE properties were measured at room temperature. Without a grain-boundary barrier, single crystal samples exhibit potential for better electrical performance.…”

Synthetic Strategies, Thermal Stability, and Optical Properties for Nanostructured Famatinite with Cu-Site Doping

“…Derivatives of PbTe and Bi 2 Te 3 have demonstrated high efficiency as thermoelectrics and have seen commercial adoption, , but the low elemental abundance, cost, and toxicity of these products continue to limit their widespread use . The copper–antimony–sulfide (CAS) subset of materials is composed of low-cost, earth-abundant compounds with properties rendering them suitable for photovoltaic and thermoelectric applications. − The CAS system features four main compounds: tetrahedrite (Cu 12 Sb 4 S 13 ), chalcostibite (CuSbS 2 ), skinnerite (Cu 3 SbS 3 ), and famatinite (Cu 3 SbS 4 ) . Famatinite features key properties that have a potential to benefit applications in solar cells and thermoelectric devices.…”