TY - JOUR
T1 - Effect of selenium deficiency on the thermoelectric properties of n-type In4Se3-x compounds
AU - Zhu, G. H.
AU - Lan, Y. C.
AU - Wang, H.
AU - Joshi, G.
AU - Hao, Q.
AU - Chen, G.
AU - Ren, Z. F.
PY - 2011/3/4
Y1 - 2011/3/4
N2 - Thermoelectric properties of dense bulk polycrystalline In 4Se3-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 In4Se 3-x compounds. Our In4Se3-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 samples.
AB - Thermoelectric properties of dense bulk polycrystalline In 4Se3-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 In4Se 3-x compounds. Our In4Se3-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 samples.
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U2 - 10.1103/PhysRevB.83.115201
DO - 10.1103/PhysRevB.83.115201
M3 - Article
AN - SCOPUS:79961039947
SN - 1098-0121
VL - 83
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 11
M1 - 115201
ER -