Chemistry, Physics, and Materials Science of Thermoelectric by M. S. Dresselhaus, Y.-M. Lin, O. Rabin (auth.), M. G.

By M. S. Dresselhaus, Y.-M. Lin, O. Rabin (auth.), M. G. Kanatzidis, S. D. Mahanti, T. P. Hogan (eds.)

This quantity: Chemistry, Physics and fabrics technological know-how of Thermoelectric fabrics: past Bismuth Telluride encompasses a sequence of topical articles that have been offered as invited lectures by means of renowned leaders during this box at a workshop held in Traverse urban, Michigan in the summertime of 2002. those articles position the state-of-the-art, concerning layout rules, candidate fabrics and platforms and present advances in context and may function an invaluable resource of insights into this box for either starting scholars and practitioners alike.

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Extra info for Chemistry, Physics, and Materials Science of Thermoelectric Materials: Beyond Bismuth Telluride

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The absence of members with n = 1, 3 etc means these members have not yet been observed, nevertheless they are predicted to exist and are legitimate synthetic targets. Members with m = 1 - The One-dimensional Subseries AMJ{}tnSe/6+n: Four different structure types with m = I are now known, AI-xM'3-xBill+xSe20, A I _xM'4_ xBill+xSe2116,At_xM's_xBill+XSe22Is and AI'XSn9_xBill+xSe2622 (A = K, Rb, Cs; M' = Sn, Pb) adopted by every possible combination of A and M'. It is therefore clear that a very large number of new materials can be generated within this group alone and tested for promising thermoelectric properties.

Boltzmann transport theory provides a general understanding of the thermopower that is expressed in the Mott equations: W/m-K. s =n 2 2 (I) k T . dlnO'(E)1 3 e dE £=£, • s(E) is the electronic conductivity determined as a function of band filling or Fermi energy, EF• If the electronic scattering is independent of energy, then s(E) is just proportional to the density of states (DOS) at EF. In the general case, S is a measure of the variation in s(E) (Le. asymmetry) above and below the Fermi surface, specifically through the logarithmic derivative of 5 with E.

One way to increase ZT is to minimize K) while retaining good electronic and thermopower properties. e alIoy scattering). e. large unit celI parameters) thus providing short mean path-lengths for the heat carrying phonons and by incorporating "rattling atoms" in the structure to generate a "phonon glass electron crystal" system. 4 Another way to maximize ZT would be to increase the power factor without drasticalIy increasing the total thermal conductivity. This is a difficult problem because if the electronic conductivity is greatly increased k also increases according to the Wiedeman-Franz (WF) law.

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