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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
Presentation Title Enhanced Thermoelectric Performance by Compositional Modulation in AgSbTe2
Author(s) Bo-Chia Chen, Hsin-Jay Wu
On-Site Speaker (Planned) Bo-Chia Chen
Abstract Scope AgSbTe2 is a promising thermoelectric compound in the mid-temperature range. Even slightly changing the ratio of each element can optimize their thermal and electrical properties effectively. However, the high electrical resistivity (ρ) affects its power factor (S2ρ), resulting in the figure-of-merit zT only ~1 at 623 K. In this research, the stoichiometric ratios for the pristine AgSbTe2 is tuned, resulting in the enhanced Seebeck coefficient (S) as well as the higher electrical conductivity. Combined with the low thermal conductivity (κ), the figure-of-merit zT increased to ~1.4. Secondly, the κ and κL are further reduced after proper doping, while the power factor remains unchanged. Our AgSbTe2-based alloys attain the peak zT ~1.7 at 623 K and an average zTave ~1.15 within 300 - 623 K, outperforming most AgSbTe2-based materials.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Robust Thermoelectric Module Based on MgAgSb/Mg3(Sb,Bi)2 with a Conversion Efficiency of 8.5% and a Maximum Cooling of 72 K
A Tentative of an Initial Materials Specification of the Process Influence on Sulfide-based Ceramics for Enhancing their Thermoelectric Performances
Bi2Te3 Based Compounds Made via Mechanical Alloying: Defect Chemistry and Phase Diagram
C-1: Compositional Modification Improves the Thermoelectric Performance of AgSbTe2
C-2: Eliciting Promising p-type Bi2Te3 with Sizeable Thermoelectric Performances
C-3: Interfacial Reactions in Cu/Se, Cu2Se/Te and Cu2Te/Se Couples
C-4: Liquid-like Copper Ionic and Multiscale Crystal Imperfections Eliciting Record-High Thermoelectric zT in n-type Bi2Te3
C-5: Low Crystallinity Cu-Te-S Compounds Elicit Ultralow Lattice Thermal Conductivity in GeTe Thermoelectric Materials
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Carrier Concentration Adjustment and Texturation Processing on Thermoelectric Silicide
Cluster-Based Molybdenum Chalcogenide Compounds for Thermoelectricity. Dream or Reality? A (Partial) Answer from Theory
Concluding Maximum Solubility Using Impurity Phase Stoichiometry
Crystal Structure, Phase Stability, and Thermoelectric Properties of Medium-Temperature IV-VI Thermoelectric Materials
Doping as a Tuning Mechanism for Magneto-thermoelectric Effects to Improve zT in Weyl Semimetals
Effect of Interfacial Stability of Bi2Te3 Thin Film Modules on Thermoelectric Property
Effects of Doping Element Addition on Phase Equilibria and Mg2Si–Mg2Sn Two-phase Microstructure Formation in Thermoelectric Mg2(Si, Sn)-based Alloys
Enhanced Mechanical Properties of Ti-rich Medium Entropy Alloys via Phase Diagram Engineering
Enhanced Thermoelectric Performance by Compositional Modulation in AgSbTe2
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