| Autor: |
Beyer, H., Nurnus, J., Böttner, H., Lambrecht, A., Wagner, E., Bauer, G. |
| Přispěvatelé: |
Publica |
| Jazyk: |
angličtina |
| Rok vydání: |
2002 |
| Předmět: |
|
| Popis: |
Experimental evidence is presented for an enhanced thermoelectric figure of merit ZT = sigma S/sup 2/T/ lambda (where sigma is the electrical conductivity, S the thermopower, T the temperature, and lambda is the thermal conductivity) by a reduction of the thermal conductivity lambda in PbTe- and Bi/sub 2/Te/sub 3/-superlattices (SLs) parallel to the layer planes. Data on thermoelectric properties of Bi/sub 2/Te/sub 3//Bi/sub 2/(Se/sub x/Te/sub 1-x/)/sub 3/-SLs, of PbTe-based doping SLs, and PbTe/PbSe/sub 0.2/Te/sub 0.8/-SLs are presented. In these structures, a decrease of lambda was measured compared to the corresponding bulk compounds or homogeneous alloys. Despite a drop of the total power factor sigma S/sup 2/ in the SLs in total an enhancement of the figure of merit ZT is found in these highly-doped PbTe and Bi/sub 2/Te/sub 3/-based SLs. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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