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Inhibition of minority transport for elevating the thermoelectric figure of merit of CuO/BiSbTe nanocomposites at high temperatures

文献类型：期刊论文

作者Li, Yuanyue1; Liu, Guoxia1; Qin, Xiaoying2; Shan, Fukai1
刊名RSC Advances
出版日期2016
卷号6期号:113页码:112050-112056
DOI10.1039/c6ra24107g
文献子类Article
英文摘要Achieving a large thermoelectric figure of merit (ZT) value at elevated temperatures for Bi2Te3-based materials is significant for low-grade waste-heat (similar to 400-500 K) recovery applications. Here, we show that in Bi0.4Sb1.6Te3 based composites incorporated with 0.2 vol% CuO nanoinclusions, the introduced asymmetric interface potentials can effectively inhibit the transport of minorities through stronger scattering than majorities, as well as the energy filtering effect, thus resulting in an obvious increase (similar to 8% rise) of power factor at high temperatures. In addition to enhanced phonon scattering at interfaces and nanoinclusions, the reduced thermal conductivity (similar to 65% decline) at elevated temperatures can be attributed to inhibition of bipolar contributions through strong scattering of minorities at the interface potentials. Consequently, in BiSbTe-based thermoelectric systems with 0.2 vol% CuO, a largest ZT = 1.37 is achieved at 496 K, which is similar to 40% larger than that of the BiSbTe matrix at the same temperature.
WOS关键词PERFORMANCE ; ENHANCEMENT ; THERMOPOWER ; PBTE
WOS研究方向Chemistry
语种英语
WOS记录号WOS:000389708700046
资助机构National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; National Natural Science Foundation of China(11374306 ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292) ; 11174292)
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/22111]  
专题合肥物质科学研究院_中科院固体物理研究所
作者单位1.Qingdao Univ, Coll Elect & Informat Engn, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China
推荐引用方式
GB/T 7714		 Li, Yuanyue,Liu, Guoxia,Qin, Xiaoying,et al. Inhibition of minority transport for elevating the thermoelectric figure of merit of CuO/BiSbTe nanocomposites at high temperatures[J]. RSC Advances,2016,6(113):112050-112056.
APA Li, Yuanyue,Liu, Guoxia,Qin, Xiaoying,&Shan, Fukai.(2016).Inhibition of minority transport for elevating the thermoelectric figure of merit of CuO/BiSbTe nanocomposites at high temperatures.RSC Advances,6(113),112050-112056.
MLA Li, Yuanyue,et al."Inhibition of minority transport for elevating the thermoelectric figure of merit of CuO/BiSbTe nanocomposites at high temperatures".RSC Advances 6.113(2016):112050-112056.

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来源：合肥物质科学研究院

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