| dc.creator | Delgado, Daniela | |
| dc.creator | Moris-López, Silvana | |
| dc.creator | Valencia-Gálvez, P. | |
| dc.creator | López, María Luisa | |
| dc.creator | Álvarez-Serrano, Inmaculada | |
| dc.creator | Blake, Graeme R. | |
| dc.creator | Galdámez, Antonio | |
| dc.date | 2023-09-11T18:48:22Z | |
| dc.date | 2023-09-11T18:48:22Z | |
| dc.date | 2023 | |
| dc.date.accessioned | 2024-05-02T20:31:39Z | |
| dc.date.available | 2024-05-02T20:31:39Z | |
| dc.identifier | http://repositorio.ucm.cl/handle/ucm/4973 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/9275193 | |
| dc.description | Herein, we report the synthesis, structural and microstructural characterization, and thermoelectric properties of AgSnm[Sb0.8Bi0.2]Te2+m and Br-doped telluride systems. These compounds were prepared by solid-state reaction at high temperature. Powder X-ray diffraction data reveal that these samples exhibit crystal structures related to the NaCl-type lattice. The microstructures and morphologies are investigated by scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDS), and high-resolution transmission electron microscopy (HRTEM). Positive values of the Seebeck coefficient (S) indicate that the transport properties are dominated by holes. The S of undoped AgSnm[Sb0.8Bi0.2]Te2+m ranges from +40 to 57 μV·K−1. Br-doped samples with m = 2 show S values of +74 μV·K−1 at RT, and the Seebeck coefficient increases almost linearly with increasing temperature. The total thermal conductivity (κtot) monotonically increases with increasing temperature (10–300 K). The κtot values of undoped AgSnm[Sb0.8Bi0.2]Te2+m are ~1.8 W m−1 K−1 (m = 4) and ~1.0 W m−1 K−1 (m = 2) at 300 K. The electrical conductivity (σ) decreases almost linearly with increasing temperature, indicating metal-like behavior. The ZT value increases as a function of temperature. A maximum ZT value of ~0.07 is achieved at room temperature for the Br-doped phase with m = 4. | |
| dc.language | en | |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Chile | |
| dc.rights | http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ | |
| dc.source | Materials, 16(15), 5213 | |
| dc.subject | Tellurides | |
| dc.subject | Seebeck coefficient | |
| dc.subject | Thermal conductivity | |
| dc.subject | Lead-free thermoelectric materials | |
| dc.title | Structural characterization and thermoelectric properties of Br-Doped AgSnm[Sb0.8Bi0.2]Te2+m Systems | |
| dc.type | Article | |
