TY - JOUR
T1 - Effects of Bi and Sb doping on the thermoelectric performance of n-type quaternary Mg2.18Ge0.1Si0.3Sn0.6 materials
AU - Rabiu, B. I.
AU - Huang, B.
AU - Shah, W. A.
AU - Luo, X.
AU - Yang, Y. Q.
N1 - Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2022/12
Y1 - 2022/12
N2 - Mg2.18(Si0.3Ge0.1Sn0.6)1-yXy (X = Bi, Sb; y = 0, 0.02, 0.06) quaternary solid solutions were synthesized via solid state reaction after ball milling followed by hot-pressing. The influences of Bi and Sb doping on its thermoelectric (TE) properties, such as thermal conductivity, Seebeck coefficient, and electrical conductivity were discussed in the temperature range of 300–800 K. Our results show that Bi and Sb are effective in n-type doping. The results illustrate that the Seebeck coefficient decreases, whereas electrical conductivity increases with increasing temperature for undoped compositions. However, the electrical conductivity decreases in a metal-like behavior for the doped sample. Additionally, the samples doped with Bi0.02 and Sb0.02 show enhanced TE properties as compared to those doped with Bi0.06 and Sb0.06, respectively. A maximum ZT of 1.28 is achieved in the sample doped with Sb0.02.
AB - Mg2.18(Si0.3Ge0.1Sn0.6)1-yXy (X = Bi, Sb; y = 0, 0.02, 0.06) quaternary solid solutions were synthesized via solid state reaction after ball milling followed by hot-pressing. The influences of Bi and Sb doping on its thermoelectric (TE) properties, such as thermal conductivity, Seebeck coefficient, and electrical conductivity were discussed in the temperature range of 300–800 K. Our results show that Bi and Sb are effective in n-type doping. The results illustrate that the Seebeck coefficient decreases, whereas electrical conductivity increases with increasing temperature for undoped compositions. However, the electrical conductivity decreases in a metal-like behavior for the doped sample. Additionally, the samples doped with Bi0.02 and Sb0.02 show enhanced TE properties as compared to those doped with Bi0.06 and Sb0.06, respectively. A maximum ZT of 1.28 is achieved in the sample doped with Sb0.02.
KW - Carrier concentration
KW - Magnesium silicide
KW - Quaternary composition
KW - Thermoelectric properties
UR - https://www.scopus.com/pages/publications/85139597464
U2 - 10.1016/j.jssc.2022.123574
DO - 10.1016/j.jssc.2022.123574
M3 - 文章
AN - SCOPUS:85139597464
SN - 0022-4596
VL - 316
JO - Journal of Solid State Chemistry
JF - Journal of Solid State Chemistry
M1 - 123574
ER -