E. V. Chernyshova, E. A. Kolesnikov, F. Yu. Bochkanov, E. V. Argunov, A. I. Voronin, V. V. Khovaylo
{"title":"Thermoelectric Properties of Zinc Oxide Doped with Aluminum and Nickel Ions","authors":"E. V. Chernyshova, E. A. Kolesnikov, F. Yu. Bochkanov, E. V. Argunov, A. I. Voronin, V. V. Khovaylo","doi":"10.1134/s2635167624600937","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this work, a thermoelectric material with the nominal composition Zn<sub>0.97</sub>Al<sub>0.02</sub>Ni<sub>0.01</sub>O is synthesized using the chemical coprecipitation method. The synthesized powder consists of the main phase of wurtzite with a small content of Ni<sub>1–<i>z</i></sub>Zn<sub><i>z</i></sub>O; the change in the crystal-lattice parameters of the main phase indicates the replacement of Zn<sup>2+</sup> with Al<sup>3+</sup>. The Ni<sub>1–<i>z</i></sub>Zn<sub><i>z</i></sub>O phase is predominantly located at the grain boundaries, blocking their growth during spark-plasma sintering. The resulting morphology enhances phonon scattering processes, which leads to a decrease in thermal conductivity. The electrical conductivity exhibits activation behavior and increases significantly in comparison with undoped ZnO, because the concentration of charge carriers increases with the substitution of Zn<sup>2+</sup>/Al<sup>3+</sup>. Thus, the chemical coprecipitation method allows one to obtain doped ZnO with an increase in thermoelectric performance of more than 2 times relative to undoped ZnO.</p>","PeriodicalId":716,"journal":{"name":"Nanotechnologies in Russia","volume":null,"pages":null},"PeriodicalIF":0.8000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nanotechnologies in Russia","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1134/s2635167624600937","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
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Abstract
In this work, a thermoelectric material with the nominal composition Zn0.97Al0.02Ni0.01O is synthesized using the chemical coprecipitation method. The synthesized powder consists of the main phase of wurtzite with a small content of Ni1–zZnzO; the change in the crystal-lattice parameters of the main phase indicates the replacement of Zn2+ with Al3+. The Ni1–zZnzO phase is predominantly located at the grain boundaries, blocking their growth during spark-plasma sintering. The resulting morphology enhances phonon scattering processes, which leads to a decrease in thermal conductivity. The electrical conductivity exhibits activation behavior and increases significantly in comparison with undoped ZnO, because the concentration of charge carriers increases with the substitution of Zn2+/Al3+. Thus, the chemical coprecipitation method allows one to obtain doped ZnO with an increase in thermoelectric performance of more than 2 times relative to undoped ZnO.
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Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.
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