Journal
CHEMISTRY OF MATERIALS
Volume 22, Issue 3, Pages 1054-1058Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm902009t
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The use of thermoelectricity for direct energy conversion from thermal to electrical energy has a long-standing history. We report that the complex p-type Ge(Sn,Pb,Te)Te alloys upon suitable alloying with SnTe can be designed to obtain very high ZT values of up to 1.2 because of both optimal electronic transport properties and minimal lattice thermal conductivity. Such alloys follow a spinodal decomposition reaction, leading to in ordered periodic nano-structure that is effective in the scattering of phonons and reduction of the lattice thermal conductivity.
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