Significant lattice thermal conductivity reduction following phase separation of the highly efficient GexPb1-xTe thermoelectric alloys

Yaniv Gelbstein, Joseph Davidow, Ehud Leshem, Oren Pinshow, Strul Moisa

نتاج البحث: نشر في مجلةمقالةمراجعة النظراء

ملخص

In an attempt to enhance the thermal to electrical conversion efficiency, novel complicated thermoelectric alloys are constantly reported. Most of these reports, correlate the low lattice thermal conductivity values, attributing to the enhanced efficiencies, to nanofeatures apparent in their systems. Yet, since most of the highly efficient thermoelectric materials ever reported are based on complicated alloys, a major reduction of the lattice thermal conductivity can be solely attributed to alloying/disordering effects. The current manuscript, explores by combined experimental and theoretical, using density functional theory and analytical modeling, approaches the lattice thermal conductivity values originated solely by alloying/disordering effects in the highly thermoelectrically efficient p-type GexPb1-xTe alloys. By comparing these calculated results to various reported experimental values following different synthesis routes, it is shown that solution-treated samples fit well to the calculated values while for phase-separated samples, a significant lattice thermal conductivity reduction of ~50% might be expected.

اللغة الأصليةإنجليزيّة أمريكيّة
الصفحات (من إلى)1431-1437
عدد الصفحات7
دوريةPhysica Status Solidi (B): Basic Research
مستوى الصوت251
رقم الإصدار7
المعرِّفات الرقمية للأشياء
حالة النشرنُشِر - 1 يناير 2014

All Science Journal Classification (ASJC) codes

  • !!Electronic, Optical and Magnetic Materials
  • !!Condensed Matter Physics

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