Record number :
1050460
Title of article :
High thermoelectric figure of merit ZT in PbTe and Bi2Te3-based superlattices by a reduction of the thermal conductivity
Author/Authors :
H. Beyer، نويسنده , , J. Nurnus، نويسنده , , H. B?ttner، نويسنده , , A. Lambrecht، نويسنده , , E. Wagner، نويسنده , , G. Bauer، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2002
Pages :
4
From page :
965
To page :
968
Abstract :
Experimental evidence is presented for an enhanced thermoelectric figure of merit ZT=σS2T/λ (where σ is the electrical conductivity, S the thermopower, T the temperature, and λ is the thermal conductivity) by a reduction of the thermal conductivity λ in PbTe- and Bi2Te3-superlattices (SLs) parallel to the layer planes. Data on thermoelectric properties of Bi2Te3/Bi2(SexTe1−x)3-SLs, of PbTe-based doping SLs, and PbTe/PbSe0.2Te0.8-SLs are presented. In these structures, a decrease of λ was measured compared to the corresponding bulk compounds or homogeneous alloys. Despite a drop of the total power factor σS2 in the SLs in total an enhancement of the figure of merit ZT is found in these highly-doped PbTe and Bi2Te3-based SLs.
Keywords :
Thermoelectrics , Superlattices , Thermal conductivity , Figure of merit
Journal title :
Physica E Low-dimensional Systems and Nanostructures
Journal title :
Physica E Low-dimensional Systems and Nanostructures
Serial Year :
2002
Link To Document :
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