Tuning of the electronic and phononic properties of NbFeSb half-Heusler compound by Sn/Hf co-doping
Source abstract
Abstract
Abstract Pure phase NbFeSb1-xSnx (where x = 0, 0.04, 0.08, 0.12, 0.16) half-Heusler samples were prepared by direct mechanical alloying followed by spark plasma sintering. The results showed that the substitution of Sb by Sn can effectively enhance the peak figure of merit (ZT) to 0.55 at 923 K in NbFeSb0.88Sn0.12 through optimized carrier concentration. To further reduce the lattice thermal conductivity (κL), we substituted Nb by Hf to enhance the point defect scattering of phonon transport. A maximum reduction of ~80% in κL was observed in Nb0.8Hf0.2FeSb0.88Sn0.12 when compared to undoped NbFeSb at 573 K. We realized a minimum κL of ~2.96 W m−1 K−1 at 673 K and a peak ZT of ~0.82 at 973 K for Nb0.88Hf0.12FeSb0.88Sn0.12.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Heusler alloys: electronic and magnetic properties · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (31)
Show source-provided references
1. Doman · 2016
2. Progress and their applications
3. Recent advances in thermoelectric materials10.1016/j.pmatsci.2016.07.002 ↗
4. A review of thermoelectrics research-recent developments and potentials for sustainable and renewable energy applications10.1016/j.rser.2013.12.053 ↗
5. Understanding the asymmetrical thermoelectric performance for discovering promising thermoelectric materials10.1126/sciadv.aav5813 ↗
6. Realizing high figure of merit in heavy-band p-type half-Heusler thermoelectric materials10.1038/ncomms9144 ↗
7. Anharmoncity and low thermal conductivity in thermoelectrics10.1016/j.mtphys.2018.02.005 ↗
8. A new defective 19-electron TiPtSb half-Heusler thermoelectric compound with heavy band and low lattice thermal conductivity
9. Identifying the specific nanostructures responsible for the high thermoelectric performance of (Bi,Sb)2Te3 nanocomposites10.1021/nl100804a ↗
10. Mie scattering of phonons by point defects in IV-VI semiconductors PbTe and GeTe
11. High thermoelectric performance from high carrier mobility and reduced lattice thermal conductivity in Ba, Yb double-filled Skutterudites10.1016/j.mtphys.2019.03.001 ↗
12. Enhancement in thermoelectric figure-of-merit of n-type Si-Ge alloy synthesized employing high energy ball milling and spark plasma sintering10.1557/opl.2012.1731 ↗
13. High efficiency half-heusler thermoelectric materials for energy harvesting10.1002/aenm.201500588 ↗
14. Achieving high power factor and output power density in p-type half-Heuslers Nb1-xTixFeSb10.1073/pnas.1617663113 ↗
15. Recent advances in nanostructured thermoelectric half-Heusler compounds10.3390/nano2040379 ↗
16. Enhanced thermoelectric performance in p-type ZrCoSb based half-Heusler alloys employing nanostructuring and compositional modulation10.1016/j.jmat.2018.11.003 ↗
17. Thermoelectric properties of n-type ZrNiSn prepared by rapid non-equilibrium laser processing10.1039/C8RA00992A ↗
18. Improved thermoelectric performance of n-type half-Heusler MCo1-xNixSb (M= Hf, Zr)10.1016/j.mtphys.2017.05.002 ↗
19. Discovery of ZrCoBi based half Heuslers with high thermoelectric conversion efficiency10.1038/s41467-018-04958-3 ↗
20. High performance p-type half-Heusler thermoelectric materials10.1088/1361-6463/aaaa58 ↗
21. a green technology for the preparation and functionalisation of nanocellulose derivatives10.1039/C8NA00238J ↗
22. Origin of high thermoelectric performance of FeNb1−xZr/HfxSb1−ySny alloys: a first-principles study10.1038/srep33120 ↗
23. Huge power factor in p-type half-Heusler alloys NbFeSb and TaFeSb10.1088/2515-7639/ab16fb ↗
24. Band engineering of high performance p-type FeNbSb based half-Heusler thermoelectric materials for figure of merit zT >110.1039/C4EE03042G ↗
25. NbFeSb-based p-type half-Heuslers for power generation applications10.1039/C4EE02180K ↗
26. Thermoelectric property study of nanostructured p-type half-Heuslers (Hf, Zr, Ti)CoSb 0.8 Sn 0.210.1002/aenm.201200973 ↗
27. Characterization of Lorenz number with Seebeck coefficient measurement10.1063/1.4908244 ↗
28. On the Half-Heusler compounds Nb1-x{Ti,Zr,Hf}xFeSb: phase relations, thermoelectric properties at low and high temperature, and mechanical properties10.1016/j.actamat.2017.06.011 ↗
29. Electronic structure and thermoelectric properties of p-type half-Heusler compound NbFeSb: a first principles study10.1039/C5RA23091H ↗
30. Ultrahigh power factor in thermoelectric system Nb0.95M0.05FeSb (M = Hf, Zr, and Ti)10.1002/advs.201800278 ↗
31. High band degeneracy contributes to high thermoelectric performance in p-type half-Heusler compounds10.1002/aenm.201400600 ↗