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 SM ISO690:2012TERMENTZIDIS, K., POKROPIVNY, Alex V., WODA, Michael, XIONG, Shiyun, CHUMAKOV, Yurii, CORTONA, Pietro, VOLZ, S.. Large thermal conductivity decrease in point defective Bi 2Te3 bulk materials and superlattices. In: Journal of Applied Physics, 2013, vol. 113, pp. 1-7. ISSN 0021-8979. DOI: https://doi.org/10.1063/1.4772783 |
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  Journal of Applied Physics |
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| Volumul 113 / 2013 / ISSN 0021-8979 /ISSNe 1089-7550 | |
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| DOI:https://doi.org/10.1063/1.4772783 | |
| Pag. 1-7 | |
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Defective Bi2Te3 structures have been studied with the aim of lowering the thermal conductivity in order to improve the thermoelectric figure of merit. The cross-plane thermal conductivities of structures containing point defects have been computed by means of molecular dynamics techniques, finding a maximum decrease of 70% for a 4% concentration of tellurium atom vacancies. Superlattices with modified stoichiometries have also been considered in order to find the configuration having the lowest thermal conductivity. In this case, a maximum decrease of 70% was also found. These predictions open the way to the design of efficient bulk thermoelectric materials having optimised thermal properties similar to those of superlattices. |
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| Cuvinte-cheie Engineering controlled terms Molecular dynamics, Point defects, Stoichiometry, superlattices, Tellurium, Tellurium compounds, Thermoelectric equipment, Thermoelectricity Engineering uncontrolled terms Bulk materials, Molecular dynamics techniques, thermoelectric figure of merit, Thermoelectric material Engineering main heading Thermal conductivity |
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