{"title":"Thermoelectric Cooling-Oriented Large Power Factor Realized in N-Type Bi2Te3 Via Deformation Potential Modulation and Giant Deformation","authors":"Fudong Zhang, Mingkai He, Lujun Zhu, Beiquan Jia, Yalin Shi, Weishuai Wang, Zhanhui Peng, Pengfei Liang, Xiaolian Chao, Zupei Yang, Di Wu","doi":"10.1002/smll.202405182","DOIUrl":null,"url":null,"abstract":"Thermoelectric refrigeration, utilizing Peltier effect, has great potential in all-solid-state active cooling field near room temperature. The performance of a thermoelectric cooling device is highly determined by the power factor of consisting materials besides the figure of merit. In this work, it is demonstrated that successive addition of Cu and Nd can realize non-trivial modulation of deformation potential in n-type room temperature thermoelectric material Bi<sub>2</sub>Te<sub>2.7</sub>Se<sub>0.3</sub> and result in a significant increment of electron mobility and remarkably enhanced power factor. Following giant hot deformation process improves grain texturing and strengthens inter-layer interaction in Bi<sub>2</sub>Te<sub>2.7</sub>Se<sub>0.3</sub> lattice, further pushing the power factor to ≈47 µW cm<sup>−1</sup> K<sup>−2</sup> at 300 K and maximal figure of merit ZT<sub>max</sub> to ≈1.34 at 423 K with average ZT<sub>ave</sub> of ≈1.27 at 300–473 K. Moreover, robust compressive strength is enhanced to ≈146.6 MPa. The corresponding finite element simulations demonstrate large temperature differences Δ<i>T</i> of ≈70 K and a maximal coefficient of performance COP ≈ 10.6 (hot end temperature at 300 K), which can be achieved in a ten-pair thermoelectric cooling virtual module. The strategies and results as shown in this work can further advance the application of n-type Bi<sub>2</sub>Te<sub>3</sub> for thermoelectric cooling.","PeriodicalId":228,"journal":{"name":"Small","volume":null,"pages":null},"PeriodicalIF":13.0000,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/smll.202405182","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Thermoelectric refrigeration, utilizing Peltier effect, has great potential in all-solid-state active cooling field near room temperature. The performance of a thermoelectric cooling device is highly determined by the power factor of consisting materials besides the figure of merit. In this work, it is demonstrated that successive addition of Cu and Nd can realize non-trivial modulation of deformation potential in n-type room temperature thermoelectric material Bi2Te2.7Se0.3 and result in a significant increment of electron mobility and remarkably enhanced power factor. Following giant hot deformation process improves grain texturing and strengthens inter-layer interaction in Bi2Te2.7Se0.3 lattice, further pushing the power factor to ≈47 µW cm−1 K−2 at 300 K and maximal figure of merit ZTmax to ≈1.34 at 423 K with average ZTave of ≈1.27 at 300–473 K. Moreover, robust compressive strength is enhanced to ≈146.6 MPa. The corresponding finite element simulations demonstrate large temperature differences ΔT of ≈70 K and a maximal coefficient of performance COP ≈ 10.6 (hot end temperature at 300 K), which can be achieved in a ten-pair thermoelectric cooling virtual module. The strategies and results as shown in this work can further advance the application of n-type Bi2Te3 for thermoelectric cooling.
期刊介绍:
Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments.
With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology.
Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.