Thermoelectric properties of p-type semiconductors copper chromium disulfide CuCrS2+x

Han, Cheng-Gong; Zhang, Bo‐Ping; Ge, Zhen‐Hua; Zhang, Lijuan; Liu, Yaochun

doi:10.1007/s10853-013-7220-1

Cited by 23 publications

(20 citation statements)

References 37 publications

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“…4b). We notice that the charge distribution and the bonding types in R B 2 compounds are in agreement with the experimental and theoretical observations in transition‐metal diborides 20–27 with very little change in the bond strength within the boron layer by the introduction of larger rare‐earth atoms.…”

Section: Resultssupporting

confidence: 88%

Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations

Kacimi

Bekkouche

Boukortt

et al. 2012

Physica Status Solidi (b)

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The electronic structure and magnetic behavior of hexagonal rare-earth diboride RB 2 are studied using ab initio densityfunctional theory in the DFT þ U approach. The effect of the spin-orbit coupling is also investigated and it is found to be a necessary requirement for the accurate description of the magnetic moment. In this paper, we study the magnetic phase stability of RB 2 compounds; the band structure and the density of state (DOS) results prove that the coulomb potential and the spin-orbit interaction are keys factors to understand the magnetic properties of these series of materials. In addition, we also explain the behavior of a chemical bond of RB 2 compounds through the analysis of the DOS and of the charge density.

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Section: Resultssupporting

confidence: 88%

Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations

Kacimi

Bekkouche

Boukortt

et al. 2012

Physica Status Solidi (b)

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“…zT around unity at 773 K was reported [70], and an even higher zT=1.4 was claimed in AgCrSe 2 -CuCrSe 2 nanocomposites by virtue of all-wavelength phonon scattering [96]. The isostructural CuCrS 2 exhibits a much lower zT value of 0.15 at 673 K, mainly due to the larger band gap and deteriorated electrical performance [99].…”

Section: Ternary Derivatives Of Cu 2 Xmentioning

confidence: 97%

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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“…This compound has a good thermopower of ≈400 µV K −1 , and a good electrical conductivity of 5 S cm −1 and also a low thermal conductivity of about 0.6 W m −1 K −1, producing a good zT value of ≈0.11 at 673 K . A series of bulk samples CuCrS 2+ x with x = 0, 0.01, 0.02, 0.06, and 0.10 were synthesized by Han et al It is found that a maximum zT value of 0.15 (with S = 350 µV K −1 , σ = 8 S cm −1 , and k = 0.5 W m −1 K −1 ) is observed for CuCrS 2.01 at 673 K. Similarly, another mineral having thermoelectric importance is colusites with chemical formula Cu 26 V 2 M 6 S 32 where M = Ge and Sn. Suekuni et al studied this compound and found the large thermopowers of about 200 µV K −1 and the good power factors of 610 and 480 µW m −1 K −2 for Ge and Sn substituted samples, respectively .…”

Section: Strategies To Improve Thermoelectric Properties Of Copper Sumentioning

confidence: 99%

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

Mulla

Rabinal

2019

Energy Tech

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The depletion of nonrenewable energy sources insisted the search for new types of energy solutions. Thermoelectric conversion is one possible energy solution which converts waste heat into useful electricity. In the past several years, thermoelectric research developed many novel materials. Among these, most of the practically useful materials with better performance are based on Bi, Pb, Te, and Sb, but are toxic and expensive. There is a need of earth‐abundant, low‐cost, and less‐toxic compounds with superior thermoelectric performance so as to realize the large‐scale commercial applications. Recent studies have identified eco‐friendly thermoelectric materials based on the alloys of copper and sulfur, suggesting an alternative to the well‐established expensive thermoelectric materials. These compounds exhibit interesting electronic properties with better thermoelectric efficiency (zT). The structural properties permit to decouple electrical and thermal conductivities, which is an essential requirement to get improved efficiency. Several approaches, such as phase tuning, doping, nanostructure/microstructure designing, compound formation, etc., are chosen to increase the performance. On the whole, the present review summarizes the strategies and techniques that have been adopted to improve the thermoelectric behavior of copper sulfides and its compounds.

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Thermoelectric properties of p-type semiconductors copper chromium disulfide CuCrS2+x

Cited by 23 publications

References 37 publications

Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations

Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations

Copper chalcogenide thermoelectric materials

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

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Thermoelectric properties of p-type semiconductors copper chromium disulfide CuCrS2+x

Cited by 23 publications

References 37 publications

Magnetic structure and bonding of rare‐earth diboride compounds RB2: First‐principles calculations

Magnetic structure and bonding of rare‐earth diboride compounds RB2: First‐principles calculations

Copper chalcogenide thermoelectric materials

Copper Sulfides: Earth‐Abundant and Low‐Cost Thermoelectric Materials

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Product

Resources

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Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations

Magnetic structure and bonding of rare‐earth diboride compounds RB₂: First‐principles calculations