Thermoelectric Properties of Silver Antimonate with Mixed Valency of Antimony

Abstract

Silver (Ag) and silver antimonate (AgSbO 3 ) composites with different amounts of Sb 3+ were synthesized by normal sintering with the aim of realizing a thermoelectric material. The electrical conductivity (σ) increased in the sample containing larger amount of Sb 3+ , whereas Seebeck coefficient (S) decreased. Producing Sb 3+ caused the generation of oxygen vacancies in the material, and thus the corresponding donor levels are created in the bandgap, providing more conduction electrons. The conductive Ag particles would contribute to the conduction path as bypasses for carrier transport. The thermal conductivity (κ) was slightly lower in the presence of Ag defects in AgSbO 3 .

Structural, Morphological, Optical, and Electrical Properties of Sol–Gel Derived Sb‐Doped ZnO Thin Films Annealed Under Different Atmospheres

“…This is an indication of Sb incorporation in the doped thin film. Moreover, the deconvolution of Sb3d 3/2 suggests that the oxidation state of Sb is Sb 3+ [ 31,32 ] correlated to Sb (III) acetate precursor. Meanwhile, Zn2p 3/2 was detected at 1021.4, 1021.2, and 1021.4 eV and the other spin–orbit is Zn2p 1/2 (Figure 5b) is situated at 1044.5, 1044.3, and 1044.5 eV for 5% Sb‐doped ZnO annealed in air, nitrogen, and argon, respectively.…”