Thermoelectrics with earth abundant elements: low thermal conductivity and high thermopower in doped SnS

Tan, Qing; Zhao, Li‐Dong; Li, Jing‐Feng; Wu, Chao; Wei, Tian‐Ran; Xing, Zhi Bo; Kanatzidis, Mercouri G.

doi:10.1039/c4ta04462b

Cited by 269 publications

(302 citation statements)

References 35 publications

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“…In summary, the 2D structure and the lattice instability from the unstable electronic structure are the root of the low thermal conductivity, which is later investigated and confirmed in SnS systems. [62] …”

Section: Wwwadvmatde Wwwadvancedsciencenewscommentioning

confidence: 99%

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: Wwwadvmatde Wwwadvancedsciencenewscommentioning

confidence: 99%

Promising Thermoelectric Bulk Materials with 2D Structures

2017

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“…[2] Ideal thermoelectric materials should possess a high dimensionless figure of merit, ZT, defined as ZT = S 2 T/ ρ(κ e + κ L ), where S is the Seebeck coefficient, T is the absolute temperature, ρ is the electronic resistivity, and κ e and κ L are the carrier and lattice thermal conductivity, respectively. [1,3] Majority of IV-VI compounds tend to be dominant thermoelectric materials in the medium-temperature (500-900 K) range; these include most of lead chalcogenides (PbTe, [4][5][6][7][8] PbSe, [9,10] and PbS [11,12]), and tin chalcogenides (SnTe, [13,14] SnSe, [15][16][17] and SnS [18]). In addition, many mixtures composed of these compounds, such as PbTe-PbSe alloys, [19][20][21] PbTe-PbS alloys, [22,23] PbSe-PbS alloys, [24,25] SnSe-SnS alloys, [26] and PbTerich quaternary alloys of PbTe-PbSe-PbS, [27,28] have been extensively studied for further improving their performance.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric performance of PbSnTeSe high-entropy alloys

Fan

Wang

et al. 2016

Materials Research Letters

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In our study, we designed the PbSnTeSe high-entropy alloy (HEA) and investigated its microstructure and thermoelectric properties. It was found that the PbSnTeSe HEA has a simple face-centered cubic structure and possesses quite low lattice thermal conductivity at low temperatures, which could be ascribed to the strong phonon scattering due to its severe lattice-distortion. Minor additions of La not only enhanced both Seebeck coefficient and electrical conductivity at high temperatures, but also suppressed the bipolar effect to some degree. Our results indicate that the HEA concept could be applied for developing promising thermoelectric materials, which merits further investigation. IMPACT STATEMENTThe high-entropy alloy-design concept was employed to develop novel thermoelectric materials. Our findings indicate that this strategy effectively reduced the lattice thermal conductivity, which have important implications for the field. ARTICLE HISTORY

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“…[3][4][5][6][7][8] For instance, Ag-doped SnS reaches thermoelectric Figure of merit ZT up to 0.6 at 900 K, [9] while PbBi 2 S 4 (galenobismutite) and Pb 3 Bi 2 S 6 (lillianite) reach about 0.3 at 750 K. The ZT value of Pb 5 Bi 6 Se 14 even reaches 0.5 at 700 K. [10] The crystal chemistry of chain-like structures of lead antimony sulfides has been discussed in detail by Skowron & Brown and Makovicky. [11,12] …”

Section: Introductionmentioning

confidence: 99%

The Crystal Structures of Pb₅Sb₄S₁₁ (Boulangerite) – A Phase Transition Explains Seemingly Contradictory Structure Models

Schultz

Nietschke

Wagner

et al. 2017

Zeitschrift anorg allge chemie

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Abstract. In the literature, many seemingly contradictory structure models of boulangerite, ideally Pb 5 Sb 4 S 11 , and the related mineral falkmanite have been reported. These can be explained by a phase transition between a low-temperature (LT) modification (P2 1 /c, a ≈ 8.07 Å, b ≈ 23.5 Å, c ≈ 21.6 Å, β ≈ 100.7°) and a disordered hightemperature (HT) modification [Pnma, a = 23.530(2) Å; b = 4.0385(8) Å and c = 21.273(2) Å, R 1 (obs) = 0.039] that occurs above ca. 350-400°C. The almost completely ordered distribution of lead and antimony cations in the LT modification involves a superstructure; the corresponding reflections are obvious in electron and X-ray diffraction patterns. Partial ordering may render them more or less diffuse. They vanish upon heating above the transition temperature, also for originally ordered natural boulangerite (from Trepča, Kosovo), and appear again after annealing below the phase transition temperature (e.g. at 330°C). The HT phase is characterized by pronounced cation disorder. Cation ordering can be described by group-subgroup relationships which may also serve for a unified description of various structure models from literature. Starting from the orthorhombic HT phase, a

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Thermoelectrics with earth abundant elements: low thermal conductivity and high thermopower in doped SnS

Cited by 269 publications

References 35 publications

Promising Thermoelectric Bulk Materials with 2D Structures

Promising Thermoelectric Bulk Materials with 2D Structures

Thermoelectric performance of PbSnTeSe high-entropy alloys

The Crystal Structures of Pb₅Sb₄S₁₁ (Boulangerite) – A Phase Transition Explains Seemingly Contradictory Structure Models

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Thermoelectrics with earth abundant elements: low thermal conductivity and high thermopower in doped SnS

Cited by 269 publications

References 35 publications

Promising Thermoelectric Bulk Materials with 2D Structures

Promising Thermoelectric Bulk Materials with 2D Structures

Thermoelectric performance of PbSnTeSe high-entropy alloys

The Crystal Structures of Pb5Sb4S11 (Boulangerite) – A Phase Transition Explains Seemingly Contradictory Structure Models

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The Crystal Structures of Pb₅Sb₄S₁₁ (Boulangerite) – A Phase Transition Explains Seemingly Contradictory Structure Models