We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Optimization of Thermoelectric Property of n‐Type Mg<sub>3</sub>Sb<sub>2</sub> Near Room Temperature via Mn&Se Co‐Doping.
- Authors
Wang, Runyu; Luo, Siyun; Mo, Xiaobo; Liu, Hang; Liu, Tong; Lei, Xiaobo; Zhang, Qinyong; Zhang, Jianjun; Huang, Lihong
- Abstract
The Bi2Te3 family has been considered a state‐of‐the‐art thermoelectric material for room‐temperature applications for over half a century. However, scarcity of the material Te has been a persistent issue. Recently, the discovery of n‐type Mg3(Bi, Sb)2‐based materials provides new hope for replacing traditional Bi2Te3, but their thermoelectric properties near room temperature still need improvement for application to practical devices. Herein, a competitive figure of merit of ≈0.8 at 300 K and a high power factor greater than 30 µW cm−1 K−2 at 300 K in n‐type Mg3.14Mn0.06Bi1.4Sb0.59Se0.01 is reported, benefiting from the rationally tuned carrier concentration of 2.29×1019 cm−3 at room temperature. Substituting the Mg site with Mn in Mg3.2Bi1.4Sb0.59Se0.01 changes the dominant carrier scattering mechanism from a mixed scattering of acoustic phonons and ionized impurities to acoustic phonon scattering. Mn doping in Mg3.2Bi1.4Sb0.59Se0.01 also enhances the mobility to 180 cm2 V−1 s−1, reduces the thermal conductivity, and significantly increases the quality factor β of the material. The high room temperature thermoelectric performance of n‐type Mn&Se co‐doped Mg3(Bi, Sb)2‐based materials makes them a highly competitive substitute for commercialized n‐type Bi2Te3.
- Publication
Advanced Sustainable Systems, 2023, Vol 7, Issue 11, p1
- ISSN
2366-7486
- Publication type
Article
- DOI
10.1002/adsu.202300234