Enhanced thermoelectric performance in Cd doped CuInTe2 compounds

Cheng, Nian; Liu, R.; Bai, Shengqiang; Shi, Xun; Chen, L.

doi:10.1063/1.4872250

Cited by 73 publications

(65 citation statements)

References 35 publications

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“…With the increase of Fe content, the temperature dependence of Hall mobility approaches to l H $ T À3/2 near room temperature in the samples with high carrier concentrations (x ¼ 0.03, 0.05, 0.1), indicating acoustic phonon scatterings start dominating carrier scattering mechanism. 27,28 At temperatures below 50 K the Hall mobility tends towards a constant value, suggestive of neutral impurity scattering. For the 1% Fe doped sample (x ¼ 0.01), the temperature dependence of mobility and is more flat at both high and low temperature.…”

Section: Electrical Transport Propertiesmentioning

confidence: 99%

Thermoelectric transport properties of diamond-like Cu1−xFe1+xS2 tetrahedral compounds

Zhang

Qin

et al. 2014

Journal of Applied Physics

111

113

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Polycrystalline samples with the composition of Cu1−xFe1+xS2 (x = 0, 0.01, 0.03, 0.05, 0.1) were synthesized by a melting-annealing-sintering process. X-ray powder diffraction reveals all the samples are phase pure. The backscattered electron image and X-ray map indicate that all elements are distributed homogeneously in the matrix. The measurements of Hall coefficient, electrical conductivity, and Seebeck coefficient show that Fe is an effective n-type dopant in CuFeS2. The electron carrier concentration of Cu1−xFe1+xS2 is tuned within a wide range leading to optimized power factors. The lattice phonons are also strongly scattered by the substitution of Fe for Cu, leading to reduced thermal conductivity. We use Debye approximation to model the low temperature lattice thermal conductivity. It is found that the large strain field fluctuation introduced by the disordered Fe ions generates extra strong phonon scatterings for lowered lattice thermal conductivity.

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Section: Electrical Transport Propertiesmentioning

confidence: 99%

Thermoelectric transport properties of diamond-like Cu1−xFe1+xS2 tetrahedral compounds

Zhang

Qin

et al. 2014

Journal of Applied Physics

111

113

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“…Doping was widely employed to improve the carrier concentration and the electrical conductivity, such as CuIn(Ga) 1−x M x Te 2 (M=Zn, Mn, Cd, Hg, Ni, Ag, Gd) [114][115][116][117][118], Cu 1−x Fe 1+x S 2 [119], Cu 3 Sb 1−x M x Se 4 (M=Al, In, Sn, Ge, Bi) [35,[120][121][122] and Cu 2 Cd 1−x In x SnSe 4 [123]. Introducing vacancies is another practical way for the electrical transport optimization as well as the lattice thermal conductivity minimizing.…”

Section: Tetragonal Diamond-like Compoundsmentioning

confidence: 99%

Copper chalcogenide thermoelectric materials

et al. 2018

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Cu-based chalcogenides have received increasing attention as promising thermoelectric materials due to their high efficiency, tunable transport properties, high elemental abundance and low toxicity. In this review, we summarize the recent research progress on this large family compounds covering diamond-like chalcogenides and liquid-like Cu 2 X (X=S, Se, Te) binary compounds as well as their multinary derivatives. These materials have the general features of two sublattices to decouple electron and phonon transport properties. On the one hand, the complex crystal structure and the disordered or even liquid-like sublattice bring about an intrinsically low lattice thermal conductivity. On the other hand, the rigid sublattice constitutes the charge-transport network, maintaining a decent electrical performance. For specific material systems, we demonstrate their unique structural features and outline the structure-performance correlation. Various design strategies including doping, alloying, band engineering and nanostructure architecture, covering nearly all the material scale, are also presented. Finally, the potential of the application of Cu-based chalcogenides as high-performance thermoelectric materials is briefly discussed from material design to device development.

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“…Among the currently developed state-of-the-art TE materials, a few binary chalcogenides, such as SnSe, 1,2 In4Se3 3-6 and PbTe, 7,8 have been explored extensively; while the ternary chalcogenides, such as CuGaTe2 [9][10][11] and CuInTe2, [12][13][14][15] have also attracted research interests in recent years because of their unique crystal structures. It was reported that Ga2Te3 forms pseudobinary alloys with Cu2Te in a wide range of compositions (Cu2Te)1-y(Ga2Te3)y.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermoelectric performance via the solid solution formation: The case of pseudobinary alloy (Cu2Te)(Ga2Te3)3 upon Sb substitution for Cu

Cui

Liu

et al. 2017

Materials & Design

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In this work we have observed the beneficial effect from the solid solution formation on the thermoelectric performance of (Cu2(1-x)Sb2xTe)(Ga2Te3)3 upon Sb substitution for Cu. This substitution allows the mixed occupations of Sb in the crystal lattice, i.e. Sb at Cu sites with x≤0.05 and at Ga sides with x≥0.05, which has resulted in the Pisarenko relation does not exactly capture the measured Seebeck coefficient under assumed effective masses m*. The reduction of the lattice thermal conductivity (κL) has been quantified within the temperature range from room temperature to 723 K. Over the entire composition range, the κL value is reduced by 33% and 25% at temperature 723 K and 580 K, respectively. This observation is in a good agreement with the theoretical calculation based on the Callaway model used in the solid solutions. Along with the increasing of the mobility and electrical conductivity, the thermoelectric performance has been improved with the highest ZT value of 0.58 at 723 K, which is about double the value of intrinsic (Cu2Te)(Ga2Te3)3. Keywords: IntroductionAlthough the transformation of waste heat into useful electric power is very attractive so far, the conversion effectiveness is still low because of poor thermoelectric (TE) performance of the materials. Therefore, searching for new materials is one of the great challenges facing the members of TE research community. The TE performance is directly dependent on the dimensionless figure of merit (ZT),

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Enhanced thermoelectric performance in Cd doped CuInTe2 compounds

Cited by 73 publications

References 35 publications

Thermoelectric transport properties of diamond-like Cu1−xFe1+xS2 tetrahedral compounds

Thermoelectric transport properties of diamond-like Cu1−xFe1+xS2 tetrahedral compounds

Copper chalcogenide thermoelectric materials

Enhanced thermoelectric performance via the solid solution formation: The case of pseudobinary alloy (Cu2Te)(Ga2Te3)3 upon Sb substitution for Cu

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