Electrical and Thermal Transport Properties of n-type Bi6Cu2Se4O6 (2BiCuSeO+2Bi(2)O(2)Se)

doi:10.1002/andp.201900340

SIC OpenIR

	Electrical and Thermal Transport Properties of n-type Bi6Cu2Se4O6 (2BiCuSeO+2Bi(2)O(2)Se)
	Zhang, Xiaoxuan; Qiu, Yuting; Ren, Dudi; Zhao, Li-Doug
	2019-12-31
Source Publication	ANNALEN DER PHYSIK
ISSN	0003-3804
Subtype	Article; Early Access
Abstract	New thermoelectric materials, n-type Bi6Cu2Se4O6 oxyselenides, composed of well-known BiCuSeO and Bi2O2Se oxyselenides, are synthesized with a simple solid-state reaction. Electrical transport properties, microstructures, and elastic properties are investigated with an emphasis on thermal transport properties. Similar to Bi2O2Se, it is found that the halogen-doped Bi6Cu2Se4O6 possesses n-type conducting transports, which can be improved via Br/Cl doping. Compared with BiCuSeO and Bi2O2Se, an extremely low thermal conductivity can be observed in Bi6Cu2Se4O6. To reveal the origin of low thermal conductivity, elastic properties, sound velocity, Gruneisen parameter, and Debye temperature are evaluated. Importantly, the calculated phonon mean free path of Bi6Cu2Se4O6 is comparable to the interlayer distance for BiOCuSe and BiOSe layers, which is ascribed to the strong interlayer phonon scattering. Contributing from the outstanding low thermal conductivity and improved electrical transport properties, the maximum ZT approximate to 0.15 at 823 K and approximate to 0.11 at 873K are realized in n-type Bi6Cu2Se3.2Br0.8O6 and Bi6Cu2Se3.6Cl0.4O6, respectively, indicating the promising thermoelectric performance in n-type Bi6Cu2Se4O6 oxyselenides.
Keyword	Bi6Cu2Se4O6 interlayer phonon scattering thermal conductivity thermoelectric oxyselenides
DOI	10.1002/andp.201900340
WOS Keyword	THERMOELECTRIC PERFORMANCE ; BICUSEO ; CONDUCTIVITY ; FIGURE
Language	英语
WOS Research Area	Physics
Publisher	WILEY-V C H VERLAG GMBH
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.sic.ac.cn/handle/331005/27527
Collection	中国科学院上海硅酸盐研究所
Recommended Citation GB/T 7714	Zhang, Xiaoxuan,Qiu, Yuting,Ren, Dudi,et al. Electrical and Thermal Transport Properties of n-type Bi6Cu2Se4O6 (2BiCuSeO+2Bi(2)O(2)Se)[J]. ANNALEN DER PHYSIK,2019.
APA	Zhang, Xiaoxuan,Qiu, Yuting,Ren, Dudi,&Zhao, Li-Doug.(2019).Electrical and Thermal Transport Properties of n-type Bi6Cu2Se4O6 (2BiCuSeO+2Bi(2)O(2)Se).ANNALEN DER PHYSIK.
MLA	Zhang, Xiaoxuan,et al."Electrical and Thermal Transport Properties of n-type Bi6Cu2Se4O6 (2BiCuSeO+2Bi(2)O(2)Se)".ANNALEN DER PHYSIK (2019).

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