Control of Thermoelectric Properties through the addition of Ag in the Bi0.5Sb1.5Te3Alloy

Lee, J. K.; Park, S. D.; Kim, B. S.; Oh, Min‐Wook; Cho, S. H.; Min, Bok Ki; Lee, H. W.; Kim, M. H.

doi:10.3365/eml.2010.12.201

Cited by 45 publications

(28 citation statements)

References 21 publications

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“…The dataset consists of Seebeck coefficient a, electrical resistivity r, and thermal conductivity k at measured temperature T. For the numerical computation of efficiency, we use the available temperature ranges of the given material: the T c is defined as the maximum of the lowest measured temperautre and T h is defined as the minimum of the highest measured temperature for given materials. Heremans et al (2008); Hsu et al (2004);Hu et al (2014Hu et al ( , 2016; Kim et al (2015c); Lin et al (2016); Liu et al (2011Liu et al ( , 2012b; Pan and Li (2016); Pei et al (2011g, 2011c; Poudel et al (2008); Rhyee et al (2009); Wang et al (2014a); Zhao et al (2012aZhao et al ( , 2012bZhao et al ( , 2014Zhao et al ( , 2015; Cui et al (2007Cui et al ( , 2008; Eum et al (2015); Fan et al (2010); Han et al (2013); Hsu et al, 2014;Zheng et al (2014);Hu et al (2015); Hwang et al (2013); Ko et al (2013); Zhang et al (2015b); Zhao et al (2005); Lee et al (2010Lee et al ( , 2013cLee et al ( , 2013a; Yan et al (2010); Lee et al (2013bLee et al ( , 2014cLee et al ( , 2014bLee et al ( , 2014aLee et al ( , 2014d (2011a, 2011e, 2011f, 2011d, 2012a, 2012b, 2014);…”

Section: Published Thermoelectric Property Datamentioning

confidence: 99%

Thermoelectric degrees of freedom determining thermoelectric efficiency

Ryu¹,

Chung²,

Park³

2021

iScience

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Summary For over half a century, the development of thermoelectric materials has based on the dimensionless figure of merit , assuming that the efficiency is mainly determined by this single parameter. Here, we show that the thermoelectric conversion efficiency is determined by three independent parameters, , τ , and β , which we call the three thermoelectric degrees of freedom (DoFs). is the well-defined mean of the traditional under nonzero temperature differences. The two additional parameters τ and β are gradients of material properties and crucial to evaluating the heat current altered by nonzero Thomson heat and asymmetric Joule heat escape. Each parameter is a figure of merit. Therefore, increasing one of the three DoFs leads to higher efficiency. Our finding explains why the single-parameter theory is inaccurate. Further, it suggests an alternative direction in material discovery and device design in thermoelectrics, such as high τ and β , beyond .

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Section: Published Thermoelectric Property Datamentioning

confidence: 99%

Thermoelectric degrees of freedom determining thermoelectric efficiency

Ryu¹,

Chung²,

Park³

2021

iScience

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“…30 The value of the Lorentz constant is approximately $2.45 Â 10 À8 V À2 K À2 for metals or a degenerate semiconductor, and 1.5 Â 10 À8 V À2 K À2 for nondegenerate semiconductor. 49 We take the value of the Lorentz constant as 1.…”

Section: Thermal Conductivitymentioning

confidence: 99%

Electronic structure and thermoelectric properties of full Heusler compounds Ca₂YZ (Y = Au, Hg; Z = As, Sb, Bi, Sn and Pb)

Yuan

Zhang

et al. 2020

RSC Adv.

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“…Park et al reported that the addition of Ag (0.01-0.2 wt %) decreased electrical resistivity and the Seebeck coefficient, an effect which they attributed to the Ag particles, which did not substitute for Bi or Sb [16]. Lee et al reported that ρ and α decreased with Ag, which substituted for Bi or Sb in p-type (Bi,Sb) 2 Te 3 [17]. The substitution of Ag for Bi or Sb was also reported by Klichová et al [18].…”

Section: Introductionmentioning

confidence: 99%

Control of Carrier Concentration by Ag Doping in N-Type Bi2Te3 Based Compounds

et al. 2018

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Many elements have been used as dopants to enhance the thermoelectric performance of Bi 2 Te 3-related materials. Among them, Ag's effect on thermoelectric properties, where Ag acts as a donor or acceptor, remains unclear. To elucidate the role of Ag in n-type Bi 2 Te 3 based compounds, Ag was added to n-type (Bi 0.9 Sb 0.1) 2 (Te 0.85 Se 0.15) 3. As the amount of Ag was increased, the electron concentration decreased, which means Ag acted as an acceptor. The added Ag atoms were found to occupy interstitial sites in the hexagonal lattices, as confirmed by X-ray analysis and first principles calculations. The reduction in electron concentration was attributed to the interaction between the interstitial Ag and intrinsic defects.

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Control of Thermoelectric Properties through the addition of Ag in the Bi0.5Sb1.5Te3Alloy

Cited by 45 publications

References 21 publications

Thermoelectric degrees of freedom determining thermoelectric efficiency

Thermoelectric degrees of freedom determining thermoelectric efficiency

Electronic structure and thermoelectric properties of full Heusler compounds Ca₂YZ (Y = Au, Hg; Z = As, Sb, Bi, Sn and Pb)

Control of Carrier Concentration by Ag Doping in N-Type Bi2Te3 Based Compounds

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Control of Thermoelectric Properties through the addition of Ag in the Bi0.5Sb1.5Te3Alloy

Cited by 45 publications

References 21 publications

Thermoelectric degrees of freedom determining thermoelectric efficiency

Thermoelectric degrees of freedom determining thermoelectric efficiency

Electronic structure and thermoelectric properties of full Heusler compounds Ca2YZ (Y = Au, Hg; Z = As, Sb, Bi, Sn and Pb)

Control of Carrier Concentration by Ag Doping in N-Type Bi2Te3 Based Compounds

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Electronic structure and thermoelectric properties of full Heusler compounds Ca₂YZ (Y = Au, Hg; Z = As, Sb, Bi, Sn and Pb)