Thermoelectric Cooling and Power Generation
Citations
8,999 citations
Cites background or methods from "Thermoelectric Cooling and Power Ge..."
...Accurate assessment of κe is important, as κl is often computed as the difference between κ and κe (equation (3)) using the experimental electrical conductivity....
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...(1) (3) Carrier concentration (cm−3) 0 0....
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...The reoptimized zT is shown at point (3)....
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Cites background from "Thermoelectric Cooling and Power Ge..."
...The undoped Bi 2 Se 3 is a semiconductor that belongs to the class of thermoelectric materials Bi 2 X 3 with a rhombohedral crystal structure (space group ; refs&nbs...
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Cites background from "Thermoelectric Cooling and Power Ge..."
...The majority of explored materials in thermoelectric devices have zT ~ 1 (69)....
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...LMs such as Bi2Te3, PbTe, and their alloys (29) and, in particular, the (Bi1–xSbx)2(Se1–yTey)3 alloy family have been in commercial use for several decades because of their room-temperature zT ~ 1 and Carnot conversion efficiencies ~5 to 6% (69)....
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...In order to optimize zT, phonons must experience a high scattering rate, thus lowering thermal conductivity [like in a glass (69, 70)], whereas electrons must experience very little scattering, maintaining high electric conductivity (as in a crystal) (70)....
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...The effectiveness of a thermoelectric device is assessed in twoways: by its Carnot efficiency (the fraction of absorbed heat that is converted into work) and by a material-dependent figure of merit, known as zT; zT = TS2s/k (69), where S is the Seebeck coefficient, T is the temperature, s is the electric conductivity, k is the thermal conductivity, and z = S2s/k (69)....
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...Thus, thermoelectric materials require high S and s and low k (69)....
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References
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