Achieving high thermoelectric performance with Pb and Zn codoped polycrystalline SnSe via phase separation and nanostructuring strategies

Liu, Jiang; Wang, Peng; Wang, Meiyu; Xu, Rui; Zhang, Jian; Liu, Jizi; Li, Di; Liang, Ningning; Du, Youwei; Chen, Guang; Tang, Guodong

doi:10.1016/j.nanoen.2018.09.025

Cited by 108 publications

(94 citation statements)

References 55 publications

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“…Meanwhile, because SnSe are typical orthorhombic layered structure, hydrothermal/solvothermal synthesis can conveniently realize morphology control of synthesized SnSe crystals to achieve either high thermoelectric performance due to anisotropy strengthening or robust mechanical properties due to grain refinements. A high peak ZT of ≈2.2 can be achieved in polycrystalline SnSe fabricated by a hydrothermal route by 1% Zn and 1% Pb codoping,16 and a high average ZT of ≈0.9 can be achieved in polycrystalline SnSe fabricated by a solvothermal route with EG as solvent and Cd‐doping,22 both indicating that solvothermal‐based solution methods can achieve significantly competitive thermoelectric performance in polycrystalline SnSe. Besides, benefitted from the advantages of convenient morphology control, hydrothermal/solvothermal synthesis are specifically suitable for fabricating SnSe nanocrystals with various sizes and types, which are good candidates for fabricating 2D and flexible thermoelectric generators.…”

Section: Conclusion Challenge and Outlookmentioning

confidence: 99%

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

2020

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Tin selenide (SnSe) is one of the most promising candidates to realize environmentally friendly, cost‐effective, and high‐performance thermoelectrics, derived from its outstanding electrical transport properties by appropriate bandgaps and intrinsic low lattice thermal conductivity from its anharmonic layered structure. Advanced aqueous synthesis possesses various unique advantages including convenient morphology control, exceptional high doping solubility, and distinctive vacancy engineering. Considering that there is an urgent demand for a comprehensive survey on the aqueous synthesis technique applied to thermoelectric SnSe, herein, a thorough overview of aqueous synthesis, characterization, and thermoelectric performance in SnSe is provided. New insights into the aqueous synthesis‐based strategies for improving the performance are provided, including vacancy synergy, crystallization design, solubility breakthrough, and local lattice imperfection engineering, and an attempt to build the inherent links between the aqueous synthesis‐induced structural characteristics and the excellent thermoelectric performance is presented. Furthermore, the significant advantages and potentials of an aqueous synthesis route for fabricating SnSe‐based 2D thermoelectric generators, including nanorods, nanobelts, and nanosheets, are also discussed. Finally, the controversy, strategy, and outlook toward future enhancement of SnSe‐based thermoelectric materials are also provided. This Review guides the design of thermoelectric SnSe with high performance and provides new perspectives as a reference for other thermoelectric systems.

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Section: Conclusion Challenge and Outlookmentioning

confidence: 99%

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

2020

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“…The most widely accepted concept is phonoglass electron‐crystal materials with intrinsically low κ l due to complex crystal structure, such as skutterudites and clathrates . In more recent years, strongly anisotropic SnSe and BiCuSeO have been evidenced possessing high electrical performance as well as low κ l and subsequently high zT due to layered structure . With liquid‐like behavior, superionic materials, such as Cu 2 X‐based (X = Te, Se, and S) thermoelectric materials, Ag 2 Se, and Ag 2 S, are also experiencing high zT with ultralow κ l .…”

Section: Introductionmentioning

confidence: 99%

“…Further studies have enhanced the peak zT values of GeTe‐based thermoelectric materials to a level higher than 2 . Under this temperature range (from ≈650 to ≈800 K), other p‐type thermoelectric materials, such as SnSe and higher manganese silicide have also drawn extensive research interests due to either low cost or high performance. Both Zhao et al and Liu et al have reported the peak zT value of SnSe can be higher than 2 when the temperature is above 800 K. Meanwhile, most other results suggest the peak zT values of SnSe are at the temperature range lower than 800 K .…”

Section: Introductionmentioning

confidence: 99%

“…Under this temperature range (from ≈650 to ≈800 K), other p‐type thermoelectric materials, such as SnSe and higher manganese silicide have also drawn extensive research interests due to either low cost or high performance. Both Zhao et al and Liu et al have reported the peak zT value of SnSe can be higher than 2 when the temperature is above 800 K. Meanwhile, most other results suggest the peak zT values of SnSe are at the temperature range lower than 800 K . When the temperature is between ≈800 and ≈1000 K, Cu 2 X, PbX (X = Te, Se, and S), SnTe as well as low‐cost and stable BiCuSeO are more attractive.…”

Section: Introductionmentioning

confidence: 99%

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Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications

et al. 2020

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Due to the nature of their liquid‐like behavior and high dimensionless figure of merit, Cu2X (X = Te, Se, and S)‐based thermoelectric materials have attracted extensive attention. The superionicity and Cu disorder at the high temperature can dramatically affect the electronic structure of Cu2X and in turn result in temperature‐dependent carrier‐transport properties. Here, the effective strategies in enhancing the thermoelectric performance of Cu2X‐based thermoelectric materials are summarized, in which the proper optimization of carrier concentration and minimization of the lattice thermal conductivity are the main focus. Then, the stabilities, mechanical properties, and module assembly of Cu2X‐based thermoelectric materials are investigated. Finally, the future directions for further improving the energy conversion efficiency of Cu2X‐based thermoelectric materials are highlighted.

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“…Moreover, Liu et al used both doping and nanostructuring techniques to enhanced PF and reduced κ lat of 5.43μWcm −1 K −2 and 0.13 Wm −1 K −1 , respectively, at a time. In this work, they used Pb and Zn dopants to polycrystalline SnSe and formed Sn 0.98 Pb 0.01 Zn 0.01 Se and reported high ZT of 2.2 at 873 K . Owing to the hugely anisotropic transport properties of SnSe, single crystal SnSe presented the best TE performance at mid‐range temperatures .…”

Section: High Performance Inorganic Te Materialsmentioning

confidence: 99%

Inorganic thermoelectric materials: A review

et al. 2020

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Summary Thermoelectric generator, which converts heat into electrical energy, has great potential to power portable devices. Nevertheless, the efficiency of a thermoelectric generator suffers due to inefficient thermoelectric material performance. In the last two decades, the performance of inorganic thermoelectric materials has been significantly advanced through rigorous efforts and novel techniques. In this review, major issues and recent advancements that are associated with the efficiency of inorganic thermoelectric materials are encapsulated. In addition, miscellaneous optimization strategies, such as band engineering, energy filtering, modulation doping, and low dimensional materials to improve the performance of inorganic thermoelectric materials are reported. The methodological reviews and analyses showed that all these techniques have significantly enhanced the Seebeck coefficient, electrical conductivity, and reduced the thermal conductivity, consequently, improved ZT value to 2.42, 2.6, and 1.85 for near‐room, medium, and high temperature inorganic thermoelectric material, respectively. Moreover, this review also focuses on the performance of silicon nanowires and their common fabrication techniques, which have the potential for thermoelectric power generation. Finally, the key outcomes along with future directions from this review are discussed at the end of this article.

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Achieving high thermoelectric performance with Pb and Zn codoped polycrystalline SnSe via phase separation and nanostructuring strategies

Cited by 108 publications

References 55 publications

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications

Inorganic thermoelectric materials: A review

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Achieving high thermoelectric performance with Pb and Zn codoped polycrystalline SnSe via phase separation and nanostructuring strategies

Cited by 108 publications

References 55 publications

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

High‐Performance Thermoelectric SnSe: Aqueous Synthesis, Innovations, and Challenges

Promising and Eco‐Friendly Cu2X‐Based Thermoelectric Materials: Progress and Applications

Inorganic thermoelectric materials: A review

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Product

Resources

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Promising and Eco‐Friendly Cu₂X‐Based Thermoelectric Materials: Progress and Applications