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Meeting 2021 TMS Annual Meeting & Exhibition
Symposium Alloys and Compounds for Thermoelectric and Solar Cell Applications IX
Presentation Title Size Effects in the High-pressure Behavior of Layered AM2X2 Compounds
Author(s) Wanyue Peng, Mario Calderon, Benjamin Brugman, Gill Levental, Ashiwini Balodhi, Megan Rylko, Susannah Dorfman, Alexandra Zevalkink
On-Site Speaker (Planned) Wanyue Peng
Abstract Scope AM2X2 layered compounds are a promising class of thermoelectric materials. Typically, for traditional layered compounds, the out-of-plane direction is significantly more compressible than the in-plane direction due to the relatively weak interlayer bonding. However, this is not necessarily true for complex layered structures. In the present study, we used high-pressure synchrotron X-ray diffraction to study a series of layered compounds with the trigonal CaAl2Si2 structure. Our results show that compounds with small cations (e.g. A = Mg) have near-isotropic compressibility, whereas larger cations exhibit anisotropic behavior akin to more traditional layered compounds. This is consistent with previously reported DFT and experimental transport properties in single crystals. Furthermore, new displacive phase transitions were observed in several AM2X2 compounds under high-enough pressures. Interestingly, although MgMg2Sb2 and MgMg2Bi2 show near-isotropic compressibility in their ambient phase, different directions of the unit cell undergo drastically different changes upon the displacive phase transition.
Proceedings Inclusion? Planned:


A Synergistic Approach to Boost the Thermoelectric Performance and Reduce the Thermal Conductivity in n-type PbTe : Carrier Optimization and Phase Diagram Engineering
Achieving Enhanced Thermoelectric Performance in Multi-phase Materials
Assessment of Electroless Cobalt Diffusion Layer for Bi2Te3-based Thermoelectric Module
Challenges and Opportunities of Flexible Thermoelectric Devices Based on Printing Technology
Co-P Diffusion Barrier for Lead Telluride-based Thermoelectric Joints
Comparing Thermoelectricity of Bulk and Thin Film Heusler Alloys
Creep Behavior of Thermoelectric Materials
Cu-Sn Based Thiospinel Compounds: Insight of Alternative Route for Developing Thermoelectrics Thiospinel Compounds?
Defect Evolution Enabling Low Thermal Conductivity and High Thermoelectric Performance for n-type PbTe
Developing Thermoelectric Thin Films and Modules for IoT Energy Harvesting
Effect of Interfacial Reaction on Bi2Te3 and Sb2Te3 Thin-film Thermoelectric Module
Effect of Phonon Drag on Seebeck Coefficient Based on Linear Response Theory
Effect of the Thermal Disorder on the Electronic and Thermoelectric Properties of Fe2VAl
Effect of Zn and Cr Co-doping on the Thermoelectric Properties of Colusite Cu26V2M6S32 (M=Ge,Sn)
Electronic Structure and Transport Properties of Some Boron-rich Ternary Compounds
Enhanced Thermoelectric Figure-of-Merit in Nanostructured n-type Bi2Te3 via Phase Diagram Engineering
First-principles Calculation of Nernst Coefficient and Magneto-Seebeck
Functionalization of the Conductive Network and Structural Disorder Engineering: Two Strategies to Reach High ZT in Ternary and Quaternary Sulfides
Generalizing the Concept of Rattling to Design Thermoelectric Materials
High-performance GeTe-based Thermoelectric Materials via Carrier Optimization
Impact of Surface Engineering in Silicon Film Thermoelectrics
Interfacial Reaction in Ag/Se, Ag/Te, Ag2Te/Se and Ag2Te/Se-30at.%Te Couples and Their Related Phase Diagram
Mg3(Sb,Bi)2 Thermoelectric Single Crystals: From p-type to n-type
Microstructure and Band Engineering for the High Performance of n-type Mg3Sb2-Mg3Bi2 Alloy
n-Bi2-xSbxTe3 as an Alternative to Mainstream n-Bi2Te3-xSex Near Room Temperature
New Thermoelectric Materials for Cooling
Ni/Pb-Te and Ni/Se-Sn Interfacial Reactions and Their Related Phase Diagrams
Optimization of n- and p-type Mg2X (X: Si, Ge, Sn): Understanding the Impact of Mg on the Thermoelectric Performance and the Change of the Valence Bands Under Solid Solution Formation
Optimizing Thermoelectric Properties of Few-layer Transition Metal Dichalcogenides
Order Parameter from the Seebeck Coefficient in Thermoelectric Kesterite Cu2ZnSnS4
Phase Boundary Mapping to Improve Na solubility, Band Convergence, and Thermoelectric Properties in p-type PbTe
Phase Interface Formation Induced by Phase Separation Process in Thermoelectric Mg2(Si, Sn) Alloys and (Zr, Ti)NiSn Alloys
Phase Transition Behavior and Thermoelectric Property of Te doped Cu2Se
Self-tuning of Carrier Type and Improved Thermoelectric Performance in Skutterudite CoM1.5Te1.5 (M = Sn or Ge)
Size Effects in the High-pressure Behavior of Layered AM2X2 Compounds
Solid-state thermionic Devices: Effect of Asymmetry on the Device Performance
Strategies for the Balance of Oxide/Metal Composites Towards the Applications of Flexible Solar Energy Harvesters
Structure and Physical Properties of Complex Chalcogenides: Fundamental Research with an “Eye” Towards Lower Temperature Applications
Study of Enhancing Power Factor of Bi2Te3 Thermoelectric Using SnO2 Nanoparticle
Study of Thermopower Enhancement by Spin Fluctuation In Ferromagnetic Fe2V1-xCoxAl Full Heusler Alloys
The Doping Effects on the Thermal Conductivity of GeTe
The Importance of the Mg-Mg Interaction in Mg3Sb2-Mg3Bi2 Shown through Cation Site Alloying
The Origin of Low Thermal Conductivity in Tetrahedrites: A Jahn-Teller Electronic Instability
The “Grand Challenge” of Thermoelectric Materials
Thermal and Electrical Transport in Zintl Thermoelectrics: From Ab Initio Understanding to Materials Discovery
Thermomagnetic Properties of Single-crystal 2H-NbSe2 and Bi2Te3
Thermomagnetic Transport in 2D Layered Topological Materials
Ultra-low Thermal Conductivity for High-Performance GeTe-based Thermoelectric Materials
Unique Influences of Laser Additive Manufacturing on Multiscale Structuring of Bismuth Telluride Thermoelectric Materials
Using Neutrons to Probe the Influence of Processing on Temperature-dependent Strain in PbTe

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