High Thermoelectric Figure of Merit Values of Germanium Antimony Tellurides with Kinetically Stable Cobalt Germanide Precipitates
| العنوان: | High Thermoelectric Figure of Merit Values of Germanium Antimony Tellurides with Kinetically Stable Cobalt Germanide Precipitates |
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| المؤلفون: | Felix Fahrnbauer, Gerald Wagner, Oliver Oeckler, Daniel Souchay |
| المصدر: | Journal of the American Chemical Society. 137:12633-12638 |
| بيانات النشر: | American Chemical Society (ACS), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Antimony telluride, Metallurgy, Analytical chemistry, chemistry.chemical_element, Germanium, General Chemistry, Biochemistry, Catalysis, Germanide, chemistry.chemical_compound, Colloid and Surface Chemistry, chemistry, Antimony, Seebeck coefficient, Telluride, Thermoelectric effect, Figure of merit |
| الوصف: | Heterostructures that consist of a germanium antimony telluride matrix and cobalt germanide precipitates can be obtained by straightforward solid-state synthesis including simple annealing and quenching procedures. The microscale precipitates are homogeneously distributed in a matrix with pronounced "herringbone-like" nanostructure associated with very low thermal conductivities. In comparison to the corresponding pure tellurides, the figure of merit (ZT) values of heterostructured materials are remarkably higher. This is mostly due to an increase of the Seebeck coefficient with only little impact on the electrical conductivity. In addition, the phononic part of the thermal conductivity is significantly reduced in some of the materials. As a result, ZT values of ca. 1.9 at 450 °C are achieved. Temperature-dependent changes of the thermoelectric properties are well-understood and correlate with complex phase transitions of the telluride matrix. However, the high ZT values are retained in multiple measurement cycles. |
| تدمد: | 1520-5126 0002-7863 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b24dcb642d4a6bf731efe0f1885700d1 https://doi.org/10.1021/jacs.5b07856 |
| رقم الأكسشن: | edsair.doi.dedup.....b24dcb642d4a6bf731efe0f1885700d1 |
| قاعدة البيانات: | OpenAIRE |
Find this issue from the American Chemical Society | تدمد: | 15205126 00027863 |
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