Realizing high thermoelectric performance in Te nanocomposite through Sb2Te3 incorporation
| Autor: | Xiao Yan Li, Xiao Yang Wang, Xu Lu, Xiao Yuan Zhou, Xiaodong Han, Heng Quan Yang, Yong Jin Chen, Lei Miao, Guo Yu Wang |
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| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Nanocomposite Materials science business.industry Doping Nanoparticle Sintering 02 engineering and technology General Chemistry Power factor 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Crystallographic defect 0104 chemical sciences Thermoelectric effect Optoelectronics General Materials Science 0210 nano-technology business |
| Zdroj: | CrystEngComm. 20:7729-7738 |
| ISSN: | 1466-8033 |
| DOI: | 10.1039/c8ce01539b |
| Popis: | The rational design and fabrication of nanostructures has become a fashionable strategy for pursing high thermoelectric performance in solid-state materials. Here we report nanostructured Te–Sb2Te3 composites with significantly enhanced thermoelectric performance through a scalable bottom-up method followed by a rapid sintering process. The power factor along with the carrier concentration could be significantly enhanced by increasing the number of point defects of . Meanwhile, a great number of boundaries and hetero-interfaces between the Te and Sb2Te3 nanoparticles could play an important role in blocking phonons, resulting in the evident suppression of lattice thermal conductivity. Ultimately, a highest zT value close to 1.0 could be achieved at 623 K in samples with components of 2.6 mol% Sb2Te3 and 97.4 mol% Te. Such a peak zT value is comparable to that of doped Te materials synthesized by the conventional solid-state reaction process. This work reveals that high thermoelectric performance could be realized in an intentionally designed nanocomposite by synergistically improving the power factor and suppressing the lattice thermal conductivity. |
| Databáze: | OpenAIRE |
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