Szczegóły publikacji
Opis bibliograficzny
Evaluation of the double-tuned functionally graded thermoelectric material approach for the fabrication of $n$-type leg based on $Pb_{0.75}Sn_{0.25}Te$ / Rafal KNURA, Taras PARASHCHUK, Akira Yoshiasa, Krzysztof T. WOJCIECHOWSKI // Applied Physics Letters ; ISSN 0003-6951. — 2021 — vol. 119 iss. 22 art. no. 223902, s. 223902-1–223902-6. — Bibliogr. s. 223902-6, Abstr. — Publikacja dostępna online od: 2021-12-01. — R. Knura - afiliacja: Kumamoto University, Japan
Autorzy (4)
Dane bibliometryczne
| ID BaDAP | 138077 |
|---|---|
| Data dodania do BaDAP | 2021-12-07 |
| Tekst źródłowy | URL |
| DOI | 10.1063/5.0075126 |
| Rok publikacji | 2021 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Applied Physics Letters |
Abstract
Thermoelectric (TE) technologies realize the generation of electrical energy from the waste heat. The one bottleneck, which significantly restricts the wide use of these technologies, relates to the low energy conversion efficiency of the commercial devices. In this work, the double-tuned functionally graded thermoelectric material (DT-FGTM) approach was proposed to achieve the high-performance TE leg through the increase in the average TE figure of merit (ZT)ave. The essence of this idea is connected with the precise control of the bandgap Eg and chemical potential lc over the entire temperature range. Considering Pb0.75Sn0.25Te solid solution, as an example, and using the three band Kane model, we evaluated the best conditions for the highest thermoelectric performance in this material. Within the offered herein DT-FGTM approach, we fabricated the thermoelectric n-type Pb0.75Sn0.25Te1xIx leg and measured its output energy characteristics. The efficiency of energy conversion for the prepared DT-FGTM leg reaches a very high value of 12.0% at temperature difference DT ¼ 540 K. Furthermore, the thermal treatment of the fabricated leg should not injure the carrier concentration distribution through the leg, as the hot end of the leg is heavily doped, and the chemical diffusion between segments would be only beneficial. Our demonstration shows that the DT-FGTM approach has significant practical interest and can be utilized for the other TE materials.
