6533b7defe1ef96bd1275c7a
RESEARCH PRODUCT
Tailoring of the electrical and thermal properties using ultra-short period non-symmetric superlattices
Paulina KomarGerhard H. FecherGerhard JakobHans-joachim KleebeMathis M. MüllerBenjamin BalkeChristoph EulerUte KolbEmigdio Chavez-angelsubject
Materials scienceCondensed matter physicsThermal resistancelcsh:BiotechnologyRelaxation (NMR)General Engineering02 engineering and technology021001 nanoscience & nanotechnologyThermoelectric materials01 natural scienceslcsh:QC1-999Thermal conductivityThermoelectric generatorElectrical resistivity and conductivitylcsh:TP248.13-248.650103 physical sciencesThermoelectric effectFigure of meritGeneral Materials Science010306 general physics0210 nano-technologylcsh:Physicsdescription
Thermoelectric modules based on half-Heusler compounds offer a cheap and clean way to create eco-friendly electrical energy from waste heat. Here we study the impact of the period composition on the electrical and thermal properties in non-symmetric superlattices, where the ratio of components varies according to (TiNiSn)���:(HfNiSn)���������, and 0 ��� n ��� 6 unit cells. The thermal conductivity (��) showed a strong dependence on the material content achieving a minimum value for n = 3, whereas the highest value of the figure of merit ZT was achieved for n = 4. The measured �� can be well modeled using non-symmetric strain relaxation applied to the model of the series of thermal resistances.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-10-01 |