Thermoelectric properties of Cu-doped p-type pseudo-binary CuxBi0.5Sb1.5−xTe3 (x=0.05–0.4) alloys prepared by spark plasma sintering

Cui, Jiaolin; Xue, H.F.; Xiu, W.J.; Yang, Wei; Xu, Xinqiang

doi:10.1016/j.scriptamat.2006.04.012

Cited by 43 publications

(17 citation statements)

References 12 publications

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“…Furthermore, the doping of Cu increases the hole concentration, which effectively suppresses the bipolar effect and shis the intrinsic excitation temperature to higher temperature. It is worth to note that the s values of the Cu-doped samples prepared via a facile hydrothermal method in our work could be comparable to that of Bi-Sb-Te alloys synthesized by conventional sintering methods, 30,39 indicating this facile hydrothermal method is an effective route for developing highperformance (Bi,Sb) 2 Te 3 -based materials.…”

Section: Methodssupporting

confidence: 60%

“…and 22% reduction than those of Cu-doped Bi-Sb-Te samples reported by Lee et al, 17 Hao et al 38 and Cui et al, 30 respectively. The low thermal conductivity of sample S2 can be ascribed to , and the presence of second phase.…”

Section: Methodsmentioning

confidence: 71%

“…For the undoped sample S1, its Seebeck coefficient decreases with the increasing temperature, which can be ascribed to the bipolar effect caused by the intrinsic excitation below room temperature. 30,35 For the Cu-doped samples S2-S4, their room temperature Seebeck coefficients decrease with the increase of Cu content, which can be attributed to increased hole concentration by substituting of Cu for Bi/Sb. Furthermore, their temperature-dependent Seebeck coefficients show the typical behavior of a degenerate semiconductor.…”

Section: Methodsmentioning

confidence: 99%

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Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method

et al. 2017

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Cu-doped p-type Bi 0.5 Sb 1.5 Te 3 compounds have been prepared by a facile hydrothermal method. X-ray powder diffraction analysis shows that the lattice parameter decreases with the Cu content, indicating that Cu + ions are distributed on the crystal site of Bi/Sb, which is further confirmed by the p-type conducting behavior of the Cu-doped Bi 0.5 Sb 1.5 Te 3 . With the addition of Cu, the hole carrier concentration increases, and meanwhile the lattice thermal conductivity decreases. Furthermore, the greatly raised hole carrier concentration effectively suppresses the bipolar effect, which is beneficial for improving the thermoelectric properties. A dimensionless thermoelectric figure of merit (ZT) value of $1.2 at room temperature is achieved for the sample with 0.6 wt% Cu (nominal composition), and the ZT value increases with the temperature to $1.5 at 150 C. Cu-doped Bi 0.5 Sb 1.5 Te 3 samples exhibit most excellent thermoelectric performance among the presently available (Bi,Sb) 2 Te 3 -based materials, implying great potential as near room temperature thermoelectric materials.

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Section: Methodssupporting

confidence: 60%

Section: Methodsmentioning

confidence: 71%

Section: Methodsmentioning

confidence: 99%

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Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method

et al. 2017

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“…Ag as a substituent at the Bi site can increase the hole carrier concentration. Cui et al [7][8][9][10][11] studied the TE properties of Ag-doped p-type Ag x Bi 0.5 Sb 1.5Àx Te 3 alloys, and found that Ag doping can reduce the lattice thermal conductivity, enhance the transport performance, and increase the dimensionless figure of merit ZT to 1.1. At the same time, Ag can provide electrons to the conduction band, which leads to donor doping due to ionization, thereby forming an n-type semiconductor.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Ag-Doped n-Type (Bi2−x Ag x Te3)0.96−(Bi2Se3)0.04 Pseudobinary Alloys

Zhang

et al. 2011

Journal of Elec Materi

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n-Type thermoelectric powders of (Bi 2Àx Ag x Te 3 ) 0.96 À(Bi 2 Se 3 ) 0.04 (0 £ x £ 0.05) have been synthesized by mechanical alloying and then consolidated by spark plasma sintering. The analysis results show that the grain size of pure Bi, Te, Ag, and Se powders is decreased to about 1 lm to 0.5 lm after they are mechanically alloyed for 2 h. The power factor of bulk material increases with increasing Ag-doping content, while the trend for the lattice thermal conductivity is the opposite. Bulk (Bi 0.99 Ag 0.04 ) 2 (Te 0.96 Se 0.04 ) 3 after milling for 12 h exhibits a higher power factor, lower thermal conductivity, and thus a higher ZT of 0.74 at 373 K.

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“…It has a long working life (over 20 years) in a wide temperature range with highly stable performance. Many studies [1][2][3][4][5][6][7][8] have been done to improve ZT value of the thermoelectric materials in recent years.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of BixSb2−xTey thermoelectric thin films from nitric acid and hydrochloric acid systems

Li¹,

Wang²

2009

Applied Surface Science

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Thermoelectric properties of Cu-doped p-type pseudo-binary CuxBi0.5Sb1.5−xTe3 (x=0.05–0.4) alloys prepared by spark plasma sintering

Cited by 43 publications

References 12 publications

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method

Thermoelectric Properties of Ag-Doped n-Type (Bi2−x Ag x Te3)0.96−(Bi2Se3)0.04 Pseudobinary Alloys

Electrodeposition of BixSb2−xTey thermoelectric thin films from nitric acid and hydrochloric acid systems

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Thermoelectric properties of Cu-doped p-type pseudo-binary CuxBi0.5Sb1.5−xTe3 (x=0.05–0.4) alloys prepared by spark plasma sintering

Cited by 43 publications

References 12 publications

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi0.5Sb1.5Te3 by a hydrothermal synthesis method

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi0.5Sb1.5Te3 by a hydrothermal synthesis method

Thermoelectric Properties of Ag-Doped n-Type (Bi2−x Ag x Te3)0.96−(Bi2Se3)0.04 Pseudobinary Alloys

Electrodeposition of BixSb2−xTey thermoelectric thin films from nitric acid and hydrochloric acid systems

Contact Info

Product

Resources

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Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method

Significantly enhanced thermoelectric performance of Cu-doped p-type Bi_0.5Sb_1.5Te₃ by a hydrothermal synthesis method