Anharmonicity and low-thermal conductivity in the multi-phase composition of Cu3Bi0.75Sb0.25S3

Autor:	T. Manimozhi, E. Senthil Kumar, K. Kamala Bharathi, M. Navaneethan, S. Kavirajan, S. Harish, J. Archana
Rok vydání:	2021
Předmět:	Work (thermodynamics) Materials science Condensed matter physics Phonon scattering Band gap Mechanical Engineering Anharmonicity Condensed Matter Physics Annealing (glass) Thermal conductivity Mechanics of Materials Thermoelectric effect General Materials Science Composition (visual arts)
Zdroj:	Materials Letters. 304:130399
ISSN:	0167-577X
DOI:	10.1016/j.matlet.2021.130399
Popis:	In this work, Cu3Bi0.75Sb0.25S3, Cu3Bi0.25Sb0.75S3 materials were prepared by solvothermal method followed by Cold press & annealing (CPA) technique and studied the thermoelectric performance. XRD results exhibited the multi-phase of Cu3BiS3 (59.56%), Cu9S5 (23.77%), Cu4Bi7S12 (12.27%), Cu3SbS4 (4.40%) for Cu3Bi0.75Sb0.25S3 and Cu3BiS3 (46.65%), Cu9S5 (33.92%), Cu3SbS4 (20.42%) for Cu3Bi0.25Sb0.75S3. Cu3Bi0.75Sb0.25S3 with n-type semiconducting nature and narrow bandgap of 0.79 eV exhibited the low thermal conductivity of 0.286 Wm−1K−1 at 353 K. From the obtained results, the cause of low κtot of Cu3Bi0.75Sb0.25S3 was predicted as the interfacial phonon scattering occurred due to the multiphase and anharmonicity of Cu3Bi0.75Sb0.25S3 leading low Cp.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c389aa9000b7bbe2237614e70c5833d8 https://doi.org/10.1016/j.matlet.2021.130399 Zobrazit plný text záznamu Full Text from ScienceDirect