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DOI	10.1039/c7ee00098g
	Tuning the carrier scattering mechanism to effectively improve the thermoelectric properties
	Shuai J.; Mao J.; Song S.; Zhu Q.; Sun J.; Wang Y.; He R.; Zhou J.; Chen G.; Singh D.J.; Ren Z.
发表日期	2017
ISSN	17545692
起始页码	799
结束页码	807
卷号	10 期号:3
英文摘要	A high thermoelectric power factor not only enables a potentially high figure of merit ZT but also leads to a large output power density, and hence it is pivotal to find an effective route to improve the power factor. Previous reports on the manipulation of carrier scattering mechanisms (e.g. ionization scattering) were mainly focused on enhancing the Seebeck coefficient. In contrast, here we demonstrate that by tuning the carrier scattering mechanism in n-type Mg3Sb2-based materials, it is possible to noticeably improve the Hall mobility, from ∼19 to ∼77 cm2 V-1 s-1, and hence substantially increase the power factor by a factor of 3, from ∼5 to ∼15 μW cm-1 K-2. The enhancement in mobility is mainly due to the reason that ionization scattering has been converted into mixed scattering between ionization and acoustic phonon scattering, which less effectively scatters the carriers. The strategy of tuning the carrier scattering mechanism to improve the mobility should be widely applicable to various material systems for achieving better thermoelectric performance. © The Royal Society of Chemistry 2017.
英文关键词	Electric power factor; Hall mobility; Ionization; Thermoelectric power; Thermoelectricity; Acoustic-phonon scattering; Carrier scattering; High figure of merit ZT; Ionization scattering; Output power density; Thermoelectric performance; Thermoelectric power factors; Thermoelectric properties; Electron scattering; composite; electrical property; ionization; mobility; scattering; thermochemistry
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190511
作者单位	Department of Physics, TcSUH, University of Houston, Houston, TX 77204, United States; Department of Physics and Astronomy, University of Missouri-Columbia, Columbia, MO 65211, United States; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
推荐引用方式 GB/T 7714	Shuai J.,Mao J.,Song S.,et al. Tuning the carrier scattering mechanism to effectively improve the thermoelectric properties[J],2017,10(3).
APA	Shuai J..,Mao J..,Song S..,Zhu Q..,Sun J..,...&Ren Z..(2017).Tuning the carrier scattering mechanism to effectively improve the thermoelectric properties.Energy & Environmental Science,10(3).
MLA	Shuai J.,et al."Tuning the carrier scattering mechanism to effectively improve the thermoelectric properties".Energy & Environmental Science 10.3(2017).