Facile Solution Synthesis, Processing and Characterization of n- and p-Type Binary and Ternary Bi–Sb Tellurides
| Autor: | Muhammet S. Toprak, Viking Roosmark, Mats Johnsson, Sedat Ballikaya, Aminu Yusuf, Bejan Hamawandi, Maciej Kuchowicz, Hazal Batili, Martina Orlovská, Rafal Szukiewicz |
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| Přispěvatelé: | İÜC, Mühendislik Fakültesi, Elektrik Elektronik Mühendisliği Bölümü |
| Jazyk: | angličtina |
| Předmět: |
Materials science
ZT Binary number polyol synthesis 02 engineering and technology Solution synthesis 010402 general chemistry thermoelectric lcsh:Technology 01 natural sciences microwave-assisted synthesis Nanomaterials lcsh:Chemistry Thermal conductivity X-ray photoelectron spectroscopy Thermoelectric effect XPS General Materials Science thermal conductivity lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes lcsh:T Process Chemistry and Technology General Engineering power factor 021001 nanoscience & nanotechnology lcsh:QC1-999 chalcogenides nanomaterial 0104 chemical sciences Computer Science Applications Characterization (materials science) lcsh:Biology (General) lcsh:QD1-999 Chemical engineering lcsh:TA1-2040 lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology Ternary operation lcsh:Physics |
| Zdroj: | Applied Sciences Volume 10 Issue 3 Applied Sciences, Vol 10, Iss 3, p 1178 (2020) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app10031178 |
| Popis: | The solution synthesis route as a scalable bottom-up synthetic method possesses significant advantages for synthesizing nanostructured bulk thermoelectric (TE) materials with improved performance. Tuning the composition of the materials directly in the solution, without needing any further processing, is important for adjusting the dominant carrier type. Here, we report a very rapid (2 min) and high yield (> 8 g/batch) synthetic method using microwave-assisted heating, for the controlled growth of Bi2&ndash xSbxTe3 (x: 0&ndash 2) nanoplatelets. Resultant materials exhibit a high crystallinity and phase purity, as characterized by XRD, and platelet morphology, as revealed by SEM. Surface chemistry of as-made materials showed a mixture of metallic and oxide phases, as evidenced by XPS. Zeta-potential analysis exhibited a systematic change of isoelectric point as a function of the material composition. As-made materials were directly sintered into pellets by using spark plasma sintering process. TE performance of Bi2&minus xSbxTe3 pellets were studied, where the highest ZT values of 1.04 (at 440 K) for Bi2Te3 and 1.37 (at 523 K) for Sb2Te3 were obtained, as n- and p-type TE materials. The presented microwave-assisted synthesis method is energy effective, a truly scalable and reproducible method, paving the way for large scale production and implementation of towards large-area TE applications. |
| Databáze: | OpenAIRE |
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