RT Journal Article T1 Optimizing Thermoelectric Properties through Compositional Engineering in Ag-Deficient AgSbTe2 Synthesized by Arc Melting A1 Prado Gonjal, Jesús De La Paz A1 García-Calvo, Elena A1 Gainza, Javier A1 Durá, Oscar J. A1 Dejoie, Catherine A1 Nemes, Norbert Marcel A1 Martínez, José Luis A1 Alonso, José Antonio A1 Serrano-Sánchez, Federico AB Thermoelectric materials offer a promising avenue for energy management, directly converting heat into electrical energy. Among them, AgSbTe2has gained significant attention and continues to be a subject of research at further improving its thermoelectric performance and expanding its practical applications. This study focuses on Ag-deficient Ag0.7Sb1.12Te2 and Ag0.7Sb1.12Te1.95Se0.05 materials, examining the impact of compositional engineering within the AgSbTe2 thermoelectric system. These materials have been rapidly synthesized using an arc-melting technique, resulting in the production of dense nanostructured pellets. Detailed analysis through scanning electron microscopy (SEM) reveals the presence of a layered nanostructure, which significantly influences the thermoelectric properties of these materials. Synchrotron X-ray diffraction reveals significant changes in the lattice parameters and atomic displacement parameters (ADPs) that suggest a weakening of bond order in the structure. The thermoelectric characterization highlights the enhanced power factor of Ag-deficient materials that, combined with the low glass-like thermal conductivity, results in a significant improvement in the figure of merit, achieving zT values of 1.25 in Ag0.7Sb1.12Te2 and 1.01 in Ag0.7Sb1.12Te1.95Se0.05 at 750 K. PB ACS SN 2637-6113 SN 2637-6113 YR 2024 FD 2024-03-05 LK https://hdl.handle.net/20.500.14352/104910 UL https://hdl.handle.net/20.500.14352/104910 LA eng NO Jesús Prado-Gonjal, Elena García-Calvo, Javier Gainza, Oscar J. Durá, Catherine Dejoie, Norbert M. Nemes, José Luis Martínez, José Antonio Alonso, and Federico Serrano-Sánchez ACS Applied Electronic Materials 2024 6 (5), 2969-2977 DOI: 10.1021/acsaelm.3c01653 DS Docta Complutense RD 7 oct 2024