Texturation boosts the thermoelectric performance of BiCuSeO oxyselenides

Sui, Jiehe; Li, Jing; He, Jiaqing; Pei, Yanling; Bérardan, David; Wu, Haijun; Dragoe, Nita; Cai, Wei; Zhao, Li‐Dong

doi:10.1039/c3ee41859f

Cited by 343 publications

(241 citation statements)

References 36 publications

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“…[94] When the grain size distribution becomes wider, the boundary scattering should increase, resulting in a slower increase and faster decrease in thermal conductivity. Finally, with an increased σ/κ tot value and unchanged Seebeck coefficient, the ZT value of textured Bi 0.875 Ba 0.125 CuSeO reaches 1.4 at 923 K along the direction perpendicular to the pressure, [52] as shown in Figure 6d.…”

Section: Bicuseomentioning

confidence: 86%

“…[80] According to solid state physical principles, the ZT value for bulk mate rials with a single parabolic band (SPB) along a certain direc tion can be given as: [4] The timeline for thermoelectric bulk materials with 2D structures, showing data from a superlattice, [8] SnSe, [11,[19][20][21] Bi 2 Te 3 , [12,14,16,17,[22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41] BiCuSeO, [12,[42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] Na x CoO 2 , [57,58] Ca 3 Co 4 O 9 , [5...…”

Section: Strategies From Artificial Superlatticesmentioning

confidence: 99%

“…[113] As an alternative, the increase in the degree of orientation along the in plane direction can partially achieve this advantage. [52] Figure 6b www.advmat.de www.advancedsciencenews.com backscattered diffraction (EBSD) detector. [52] Euler and inverse pole images are adopted to describe the orientation of the grains.…”

Section: Bicuseomentioning

confidence: 99%

“…[52] Figure 6b www.advmat.de www.advancedsciencenews.com backscattered diffraction (EBSD) detector. [52] Euler and inverse pole images are adopted to describe the orientation of the grains. It can be seen that the grains in the as prepared sample (referring to that without hot forging) have a random orienta tion, as the inverse pole image shows a disorderly distribution.…”

Section: Bicuseomentioning

confidence: 99%

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Promising Thermoelectric Bulk Materials with 2D Structures

2017

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Given that more than two thirds of all energy is lost, mostly as waste heat, in utilization processes worldwide, thermoelectric materials, which can directly convert waste heat to electricity, provide an alternative option for optimizing energy utilization processes. After the prediction that superlattices may show high thermoelectric performance, various methods based on quantum effects and superlattice theory have been adopted to analyze bulk materials, leading to the rapid development of thermoelectric materials. Bulk materials with two‐dimensional (2D) structures show outstanding properties, and their high performance originates from both their low thermal conductivity and high Seebeck coefficient due to their strong anisotropic features. Here, the advantages of superlattices for enhancing the thermoelectric performance, the transport mechanism in bulk materials with 2D structures, and optimization methods are discussed. The phenomenological transport mechanism in these materials indicates that thermal conductivities are reduced in 2D materials with intrinsically short mean free paths. Recent progress in the transport mechanisms of Bi2Te3‐, SnSe‐, and BiCuSeO‐based systems is summarized. Finally, possible research directions to enhance the thermoelectric performance of bulk materials with 2D structures are briefly considered.

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Section: Bicuseomentioning

confidence: 86%

Section: Strategies From Artificial Superlatticesmentioning

confidence: 99%

Section: Bicuseomentioning

confidence: 99%

Section: Bicuseomentioning

confidence: 99%

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Promising Thermoelectric Bulk Materials with 2D Structures

2017

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“…Consequently, efforts have been devoted over the last 15 years to the optimization of TE properties of both n-type and p-type oxide materials. Good candidates for n-type materials include Nb-, W-, La-, Ce-, Pr-, Nd-, Sm-, Gd-, Dy-, and Ydoped SrTiO 3 [1][2][3][4][5][6][7][8][9][10][11][12][13], Nb-, La-, Nd-, Sm-, and Gd-doped Sr 2 TiO 4 , and Sr 3 Ti 2 O 7 [14], La-doped CaMnO 3 [15] or Al-, Ge-, Ni-and Co-doped ZnO [16][17][18][19][20], Ce-doped In 2 O 3 [21], Er-doped CdO [22,23], TiO 2 [24], Nb 2 O 5 [24], WO 3 [24], while for p-type materials the most promising compounds are Ca 3 Co 4 O 9 [25] with ZT ∼ 0.3 at 1000 K [26], and BiCuSeO with ZT ∼ 1.4 at 923 K. [27] Many studies have concerned doped SrTiO 3 , demonstrating the largest ZT ∼ 0.4 in SrTi 0.8 Nb 0.2 O 3 films at 1000 K [2], and ZT ∼ 0.41 in bulk Sr 1−3x/2 La x TiO 3 at 973 K. [12] Different strategies have been proposed to further increase TE efficiency. Attempts to decrease the lattice thermal conductivity κ l by atomic substitution of Sr by Ba have been envisaged but seem to negatively affect the TE performance.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Modeling of SrTiO₃Based Oxides for Thermoelectric Applications

et al. 2016

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Using first-principles electronic structure calculations, we studied the electronic and thermoelectric properties of SrTiO3 based oxide materials and their nanostructures identifying those nanostructures which possess highly anisotropic electronic bands. We showed recently that highly anisotropic flat-and-dispersive bands can maximize the thermoelectric power factor, and at the same time they can produce low dimensional electronic transport in bulk semiconductors. Although most of the considered nanostructures show such highly anisotropic bands, their predicted thermoelectric performance is not improved over that of SrTiO3. Besides highly anisotropic character, we emphasize the importance of the large weights of electronic states participating in transport and the small effective mass of charge carriers along the transport direction. These requirements may be better achieved in binary transition metal oxides than in ABO3 perovskite oxide materials.

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Thermoelectric Materials

Owens‐Baird

Heinrich

Kovnir

2017

Encyclopedia of Inorganic and Bioinorganic Chemistry

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The field of thermoelectric materials has flourished over the last two decades. Significant successes achieved in the development of materials notwithstanding, novel and highly efficient materials are in steep demand due to a wide range of potential and current applications, ranging from wearable electronics to space missions. The main challenge in the improvement of the thermoelectric figure of merit ( zT ) is to optimize the intertwined intrinsic charge and thermal transport properties. High electrical conductivity and thermopower, along with low thermal conductivity, need to be achieved simultaneously to excel the thermoelectric efficiency. In this review, the thermoelectric concepts, basics of transport properties, and strategies for zT optimization are discussed in the first section. In the following sections, the predominate structure types associated with high‐performance bulk thermoelectric materials are discussed in detail: Bi 2 Te 3 , PbTe, TAGS/LAST systems, SnSe, Cu 2− x Se, chalcopyrites, tetrahedrites, clathrates, skutterudites, zinc antimonides, Yb 14 MnSb 11 , Heusler and half‐Heusler intermetallics. The basic crystal structures, the possibilities for doping and substitutions to adjust charge carrier concentration and thermal conductivity, baseline thermoelectric properties, and strategies for efficiency improvement are considered for each structure type. Examples of recent work highlighting these strategies are briefly presented.

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Texturation boosts the thermoelectric performance of BiCuSeO oxyselenides

Cited by 343 publications

References 36 publications

Promising Thermoelectric Bulk Materials with 2D Structures

Promising Thermoelectric Bulk Materials with 2D Structures

First-Principles Modeling of SrTiO₃Based Oxides for Thermoelectric Applications

Thermoelectric Materials

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Texturation boosts the thermoelectric performance of BiCuSeO oxyselenides

Cited by 343 publications

References 36 publications

Promising Thermoelectric Bulk Materials with 2D Structures

Promising Thermoelectric Bulk Materials with 2D Structures

First-Principles Modeling of SrTiO3Based Oxides for Thermoelectric Applications

Thermoelectric Materials

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Product

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First-Principles Modeling of SrTiO₃Based Oxides for Thermoelectric Applications