High-Performance Low-Cost n-Type Se-Doped Mg3Sb2-Based Zintl Compounds for Thermoelectric Application
By Jiawei Zhang, Lirong Song, Aref H Mamakhel, M. R. Jørgensen, B. Iversen. 2017
176 citations recorded by the source corpus.
Thermoelectric materials, capable of converting heat directly into electricity without moving parts, provide a promising solid-state solution for waste heat harvesting. However, currently available commercial thermoelectric materials PbTe and Bi2Te3 are based on tellurium, an extremely scarce and expensive element, which prohibits large scale applications. Herein, we present a systematic study on a new low-cost Te-free material, n-type Se-doped Mg3Sb1.5Bi0.5, by combining the structure and property characterization with electronic structure and electrical transport modeling. Compared with pure Mg3Sb2, Se-doped Mg3Sb1.5Bi0.5 shows the considerably enhanced power factor as well as much lower thermal conductivity. The excellent electrical transport originates from a nontrivial near-edge conduction band with six conducting carrier pockets and a light conductivity effective mass as well as the weak contribution from a secondary conduction band with a valley degeneracy of 2. The accurate location of the conduct...
Subfields: Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/197c413ab36041e12a47c6a3ddb2793dcd6054c5
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In Materials Chemistry
- Md. Nazibul Hasan
- A. Zevalkink
- N. Nayan
- M. S. Mohamed Ali
- Geoffroy Hautier
- Gian-Marco Rignanese
- Guido Petretto
- H. Wahid
Citations in the corpus
- Inorganic thermoelectric materials: A review (2020, background): “1 to 1 S cm at a temperature range of (300-1000) K(398); and polycrystalline SrTiO3 exhibits the S < 100 μVK.”
- An Unlikely Route to Low Lattice Thermal Conductivity: Small Atoms in a Simple Layered Structure (2018, background): “, the defect origin of n-type doping [39], [55], the multi-valley character of the conduction band [65], [23], [48], [21], and routes to increased carrier mobility [27], [50].”