Electrical and Thermal Properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Bi</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Te</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Satterthwaite, C. B.; Ure, R. W.

doi:10.1103/physrev.108.1164

Cited by 423 publications

(212 citation statements)

References 11 publications

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“…The 80°C limit is imposed by severe diffusion of solder material into the TE materials rather than by TE materials themselves. The melting points of TE materials Bi 2 Te 3 , Sb 2 Te 3 , and Bi 2 Se 3 are 585°C [8], 618°C [9], and 706°C [10], respectively. Therefore, to extend the operating temperature to 150°C, solder diffusion at high temperature must be stopped.…”

Section: Introductionmentioning

confidence: 99%

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Lin

Wesolowski

Lee

2011

J Mater Sci: Mater Electron

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In this research, a fundamental study is conducted to identify the materials and develop the processes for producing barrier/bonding composite on Bi 2 Te 3 for high temperature thermoelectric applications. The composite must meet four basic requirements: (a) prevent interdiffusion between the electrode material, for our design, silver(Ag) and Bi 2 Te 3 , (b) bond well to Bi 2 Te 3 , (c) bond well to Ag electrode, and (d) do not themselves diffuse into Bi 2 Te 3 . The composites investigated include palladium (Pd), nickel/gold (Ni/Au), Ag, and titanium/gold (Ti/Au). After annealing at 250°C for 200 h, only the Ti/Au design meets all four requirements. The thickness of Ti and Au, respectively, is only 100 nm. Other than meeting these four requirements, the Ti/Au layers exhibit excellent step coverage on the rough Bi 2 Te 3 surface even after the annealing process.

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Section: Introductionmentioning

confidence: 99%

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Lin

Wesolowski

Lee

2011

J Mater Sci: Mater Electron

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“…These are considered as ultra-low and markedly different from the known inorganic materials such as: TiO 2 13 , Bi 2 Te 3 etc which are in the range of 10-100 W/mK 14 . In fact, the thermal conductivity of MAPbI 3 is closer to that of polymeric materials than those of crystalline structures 15 .…”

mentioning

confidence: 99%

Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH₃NH₃PbI₃

Pisoni

Jaćimović

Barišić

et al. 2014

J. Phys. Chem. Lett.

455

465

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We report on the temperature dependence of thermal conductivity of single crystalline and polycrystalline organometallic perovskite CH3NH3PbI3. The comparable absolute values and temperature dependence of the two samples’ morphologies indicate the minor role of the grain boundaries on the heat transport. Theoretical modeling demonstrates the importance of the resonant scattering in both specimens. The interaction between phonon waves and rotational degrees of freedom of CH3NH3 + sublattice emerges as the dominant mechanism for attenuation of heat transport and for ultralow thermal conductivity of 0.5 W/(Km) at room temperature.

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“…Bulk ZT is around 1 [23] As seen in figure 10, comparing the micro to nano graphs it is observed that as CSD decreases the ZT also decreases. This is a direct contradiction to what was expected from the theoretical literature, where it should increase.…”

Section: Zt Vs Csdmentioning

confidence: 58%

“…Bulk thermal conductivity is 5.1 W m -1 K -1 [23]. Thermal conductivity shows a decreases on micro and nano scales.…”

Section: Thermal Conductivity Vs Csdmentioning

confidence: 89%

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Macro to Nano: Scaling Effects of Bi2Te3 Thermoelectric Generators for Applications in Space

Smith

Cahill

Nuhoglu

2016

PAMR

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Abstract:For decades research and development has been committed to improving the Figure of Merit (ZT) of Bismuth Telluride (Bi2Te3) Thermoelectric Generators (TEG) and has reached its limit at ≈1. This Meta-study aims to determine if further improvements can be made when the size of TEGs decrease. To quantify the change from macro to nano scale the change in ZT, thermal and electrical conductance, Seebeck coefficient and power factor as the size of the thermoelements decrease has been investigated as well as how Wiedemann-Franz (WF) law holds on the nanoscale. This meta-study was conducted by evaluating and comparing developments in TEGs for the past three decades. Based on theory it was expected that increases in ZT would occur as the thermoelement dimensions are reduced due to increased scattering of electrons and phonons as well as the increased density of electronic states. Increases to ZT due to these effects was not observed in experimental data due to difficulties in nanoscale production. This meta-study observed some indicators that the theory is correct in reduced thermal conduction from increased phonon and electron scattering and that phonon scattering was greater than electron scattering. Furthermore, a weak indication that WF law is not applicable on the nanoscale due to the scattering suggesting a decoupling of electrical and thermal conduction which is not achievable in macro scale TEGs

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Electrical and Thermal Properties ofBi2Te3

Cited by 423 publications

References 11 publications

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH₃NH₃PbI₃

Macro to Nano: Scaling Effects of Bi2Te3 Thermoelectric Generators for Applications in Space

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Electrical and Thermal Properties ofBi2Te3

Cited by 423 publications

References 11 publications

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Barrier/bonding layers on bismuth telluride (Bi2Te3) for high temperature thermoelectric modules

Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH3NH3PbI3

Macro to Nano: Scaling Effects of Bi2Te3 Thermoelectric Generators for Applications in Space

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Ultra-Low Thermal Conductivity in Organic–Inorganic Hybrid Perovskite CH₃NH₃PbI₃