Lattice thermal conductivity of 
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 and SnSe using Debye-Callaway and Monte Carlo phonon transport modeling: Application to nanofilms and nanowires

Al-Alam, Patricia; Pernot, Gilles; Isaiev, Mykola; Lacroix, David; Vos, Mélanie De; Stein, Nicolas; Osenberg, David; Philippe, Laëtitia

doi:10.1103/physrevb.100.115304

Cited by 13 publications

(5 citation statements)

References 64 publications

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“…To evaluate the effects on reducing κ l by different lattice imperfections, a classical Debye–Callaway model is commonly used 206,249. In the relaxation time approximation, it can be expressed as35,206,250

κ_{l} = \frac{k_{B}}{2 π^{2} v} {(\frac{k_{B} T}{ℏ})}^{3} \int_{0}^{\frac{θ_{D}}{T}} τ_{c} \frac{ζ^{4} e^{ζ}}{{(e^{ζ} - 1)}^{2}} d ζ

Here, ζ is defined as

ζ = \frac{ℏ ω}{k_{B} T}

where ω is the angular frequency.…”

Section: Fundamentalmentioning

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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κ_{l} = \frac{k_{B}}{2 π^{2} v} {(\frac{k_{B} T}{ℏ})}^{3} \int_{0}^{\frac{θ_{D}}{T}} τ_{c} \frac{ζ^{4} e^{ζ}}{{(e^{ζ} - 1)}^{2}} d ζ

Here, ζ is defined as

ζ = \frac{ℏ ω}{k_{B} T}

where ω is the angular frequency.…”

Section: Fundamentalmentioning

confidence: 99%

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

2020

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“…However, decreasing the dimensionality is beneficial for the thermal conductivity, according to theoretical [ 10 ] and experimental researches [ 11 ]. For thin SnSe films, Al-Alam et al theoretically predicted the decrease of the thermal conductivity for thicknesses lower than 1 µm [ 12 ]. This trend was experimentally confirmed by Burton et al with a thermal conductivity lower than 0.1 W•m -1 •K -1 and a Seebeck coefficient higher than 600 µV•K -1 [ 13 ], which make SnSe thin layers a promising material for thermoelectric applications.…”

Section: Introductionmentioning

confidence: 79%

Electrodeposition of Tin Selenide from Oxalate-Based Aqueous Solution

Vos

Danine

Adam

et al. 2020

J. Electrochem. Soc.

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In this work, we report a study of the electrodeposition of SnSe. Considering the difficulty to stabilize the baths containing Sn(II) and Se(IV) precursors, we investigated the benefits of using sodium oxalate as a complexing agent. Preliminary cyclic voltammetric (CVs) experiments were performed to study the electrochemical behavior of tin and selenium redox systems within this specific electrolyte solution. The study revealed that the oxalate reagent stabilizes the bath chelating Sn(II) and then preventing the precipitation of SnO2. From the CVs, a growth mechanism is proposed and a synthesis potential window is defined, in which the electrodeposition of SnSe films was investigated. Between -0.5 and -0.6 V vs sat. AgCl/Ag, the deposits exhibit typical polycrystalline SnSe needle-like grains. SnSe was shown by Raman spectroscopy and the XRD patterns display an orthorhombic single-phase for this compound. Additional Mössbauer analyses confirm the presence of Sn(II), which is in good agreement with the chemical composition of SnSe films. Moreover, a cross-analysis between the methods shows also the presence of SnSe2 in minor proportion. The depth profile analyses of the samples reveal an in-depth homogeneity as well as the presence of oxygen at the layer surface.

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“…2d ), which is almost an order of magnitude lower than their bulk counterparts. As per the Callaway’s model, under relaxation time approximation, the phonon relaxation time purely depends on the grain size and thickness of the thin film 35 , 36 . Thus, here the thermal conductivity of thin films is controlled by nano-textured grains rather than the strain-induced effect in bulk materials.…”

Section: Resultsmentioning

confidence: 99%

Three dimensional architected thermoelectric devices with high toughness and power conversion efficiency

Karthikeyan

Surjadi

et al. 2023

Nat Commun

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For decades, the widespread application of thermoelectric generators has been plagued by two major limitations: heat stagnation in its legs, which limits power conversion efficiency, and inherent brittleness of its constituents, which accelerates thermoelectric generator failure. While notable progress has been made to overcome these quintessential flaws, the state-of-the-art suffers from an apparent mismatch between thermoelectric performance and mechanical toughness. Here, we demonstrate an approach to potentially enhance the power conversion efficiency while suppressing the brittle failure in thermoelectric materials. By harnessing the enhanced thermal impedance induced by the cellular architecture of microlattices with the exceptional strength and ductility (>50% compressive strain) derived from partial carbonization, we fabricate three-dimensional (3D) architected thermoelectric generators that exhibit a specific energy absorption of ~30 J g−1 and power conversion efficiency of ~10%. We hope our work will improve future thermoelectric generator fabrication design through additive manufacturing with excellent thermoelectric properties and mechanical robustness.

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Lattice thermal conductivity of Bi2Te3 and SnSe using Debye-Callaway and Monte Carlo phonon transport modeling: Application to nanofilms and nanowires

Cited by 13 publications

References 64 publications

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

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

Electrodeposition of Tin Selenide from Oxalate-Based Aqueous Solution

Three dimensional architected thermoelectric devices with high toughness and power conversion efficiency

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