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Evaluation of Thermoelectric Properties of Ag0.366Sb0.558Te
Liu, HX; Li, W; Shen, HW; Zhang, XY; Lin, SQ; Pei, YZ
2020-11-01
Source PublicationANNALEN DER PHYSIK
ISSN0003-3804
Issue11
SubtypeArticle
AbstractTernary AgSbTe2 materials are frequently reported to show a promising thermoelectric performance, due to the intrinsically low lattice thermal conductivity and complex valence band structure. However, stoichiometric AgSbTe2 is found to be thermodynamically unstable and would partially decompose into Ag2Te and Sb2Te3 during thermal cycling. Instead, Ag0.366Sb0.558Te is the composition for stabilizing the single-phase according to the Ag2Te-Sb2Te3 phase diagram, while the thermoelectric transport properties have rarely been reported and are the focus of this work. Sn/Sb substitution is found to effectively increase not only the carrier concentration from approximate to 5 x 10(19) cm(-3) to approximate to 4 x 10(21) cm(-3), but also the density-of-states effective mass, leading to an enhanced Seebeck coefficient along with a decreased carrier mobility. Single parabolic band (SPB) model with acoustic phonon scattering enables a good understanding on the charge transport. The increased carrier concentration effectively suppresses the bipolar effect at high temperatures. As a result, a peak zT of approximate to 1.3 and an average of approximate to 0.9 are achieved.
DOI10.1002/andp.201900561
WOS KeywordTHERMAL-CONDUCTIVITY ; ENHANCED FIGURE ; PERFORMANCE ; MERIT ; TRANSPORT ; PARAMETERS ; SCATTERING ; COMPOUND ; AG2TE ; HEAT
Language英语
WOS Research AreaPhysics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28264
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Liu, HX,Li, W,Shen, HW,et al. Evaluation of Thermoelectric Properties of Ag0.366Sb0.558Te[J]. ANNALEN DER PHYSIK,2020(11).
APA Liu, HX,Li, W,Shen, HW,Zhang, XY,Lin, SQ,&Pei, YZ.(2020).Evaluation of Thermoelectric Properties of Ag0.366Sb0.558Te.ANNALEN DER PHYSIK(11).
MLA Liu, HX,et al."Evaluation of Thermoelectric Properties of Ag0.366Sb0.558Te".ANNALEN DER PHYSIK .11(2020).
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