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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications XI
Presentation Title Mixing Amorphous and Crystalline Structures for High Performance n-type Bi2Te3 Thermoelectrics
Author(s) Wan-Ting Yen, Hsin-jay Wu, Kuang-Kuo Wang
On-Site Speaker (Planned) Wan-Ting Yen
Abstract Scope Bismuth telluride-based thermoelectric (TE) materials have been widely used in waste heat recovery and thermoelectric (TE) coolers. However, the peak zT of n-type Bi2Te3 is lower than the p-type counterparts, hindering the conversion efficiency for a Bi2Te3-based device. In this work, the TE performance of n-type Bi2Te3 is improved by doping a dilute amount of liquid-like copper chalcogenides Cu2X (X = S, Se, Te), yielding the ultrahigh carrier mobility as fluxes of the highly-mobile Cu ions are introduced. Meanwhile, the chalcogenide anions induce severe crystal imperfections, leading to the low κL that lay close to the amorphous limit of Bi2Te3. A hybrid of crystalline materials with liquid-like superionic conductors paves a new route for designing high-performance TE alloys.
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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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
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Mixing Amorphous and Crystalline Structures for High Performance n-type Bi2Te3 Thermoelectrics
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