Effect of selenium deficiency on the thermoelectric properties of n-type In4Se3-x [In subscript 4 Se subscript 3-x] compounds
Author(s)
Zhu, G. H.; Lan, Y. C.; Wang, H.; Joshi, G.; Hao, Qing; Chen, Gang; Ren, Z. F.; ... Show more Show less
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Thermoelectric properties of dense bulk polycrystalline In4Se3−x [In subscript 4 Se subscript 3-x] (x = 0, 0.25, 0.5, 0.65, and 0.8) compounds
are investigated. A peak dimensionless thermoelectric figure of merit (ZT) of about 1 is achieved for x = 0.65
and 0.8. The peak ZT is about 50% higher than the previously reported highest value for polycrystalline In4Se3−x [In subscript 4 Se subscript 3-x]
compounds. Our In4Se3−x [In subscript 4 Se subscript 3-x] samples were prepared by ball milling and hot pressing.We show that it is possible to
effectively control the electrical conductivity and thermal conductivity by controlling selenium (Se) deficiency
x. The ZT enhancement is mainly attributed to the thermal conductivity reduction due to the increased phonon
scattering by Se deficiency, defects, and nanoscale inclusions in the ball-milled and hot-pressed dense bulk
In4Se3−x [In subscript 4 Se subscript 3-x] samples.
Date issued
2011-03Department
Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
Physical review B
Publisher
American Physical Society
Citation
Zhu, G. et al. “Effect of selenium deficiency on the thermoelectric properties of n-type In_{4}Se_{3-x} compounds.” Physical Review B 83, 115201 (2011): n. pag. © 2011 American Physical Society
Version: Final published version
ISSN
1098-0121
1550-235X