Enhancement of the thermoelectric performance of Cu<sub>3</sub>SbSe<sub>4</sub> particles by controlling morphology using exfoliated selenium nanosheets

Kim, Minsu; Park, Dabin; Kim, Jooheon

doi:10.1039/d2dt01181f

Cited by 3 publications

(6 citation statements)

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“…The TEM image and HRTEM image of the as-prepared CSS MPs are shown in Figure c,d. The CSS MPs exhibit an irregular triangular morphology, with an interplanar spacing of 0.3212 nm assigned to the (112) facet . The narrowing interplanar spacing, combined with the shrinkage of the unit cell presented in XRD analysis, strongly evidences extra host atom vacancies generated in the unit cell of Cu 3 SbSe 4 crystals synthesized by using the Se NW template.…”

Section: Resultsmentioning

confidence: 93%

“…Kim et al reported morphology optimization of a Cu 3 SbSe 4 thin film to enhance its thermoelectric performance using exfoliated selenium nanosheets. The synthesized Cu 3 SbSe 4 nanosheets achieved a ZT value of 0.40, which was 1.41 times higher than that of Cu 3 SbSe 4 nanoparticles …”

Section: Introductionmentioning

confidence: 86%

“…The two hybrid films increase with increasing temperature in the temperature range of 300−400 K, which is a characteristic behavior of nondegenerate semiconductors. 27 Moreover, it can be noticed that the σ of the CSS MP hybrid film is much larger than that of the CSS NP hybrid film in the measured temperature range. Specifically, the σ of the CSS MP hybrid film reaches 79.41 S/cm at 400 K, which is about 3.53 times higher than that (22.51 S/cm) of the CSS NP hybrid film.…”

mentioning

confidence: 89%

“…The synthesized Cu 3 SbSe 4 nanosheets achieved a ZT value of 0.40, which was 1.41 times higher than that of Cu 3 SbSe 4 nanoparticles. 27 Thus, we came up with an idea to synthesize large-sized sheets of Cu 3 SbSe 4 crystals via the nanoconfined self-assembly approach by wet chemical synthesis, and then using a nylon membrane as a substrate, we prepared nontoxic and economical Cu 3 SbSe 4 flexible thermoelectric (TE) hybrid films. In this study, we controlled the morphology of Cu 3 SbSe 4 by Se nanowires (Se NWs).…”

Section: Introductionmentioning

confidence: 99%

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2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

Dou,

Yao,

et al. 2024

ACS Appl. Mater. Interfaces

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Fabrication of large-sized inorganic nanosheets is an efficient strategy to promote carrier transportation in flexible thermoelectric (TE) films. Herein, we report the self-assembly of large-sized Cu 3 SbSe 4 nanosheets by using a Se nanowire template via wet chemical synthesis and then vacuum-assisted filter these plate-like microcrystals on nylon to prepare Cu 3 SbSe 4 flexible thermoelectric (TE) hybrid films. SEM reveals that the as-synthesized Cu 3 SbSe 4 powders by using Se nanowires as selenium sources presented 2D plate-like micron structures uniformly and tightly selfassembled by acute triangle-like nanoparticles. Furthermore, XPS evidences that extra Sb vacancies are generated in the unit cell of Cu 3 SbSe 4 crystals synthesized by using the Se NW template, resulting in the shrinkage of the unit cell and the narrowing interplanar spacing, which are characterized by XRD and TEM. As a result, both carrier concentration and carrier mobility have been significantly improved. The high carrier concentration is proved to originate from the extra carriers induced by Sb vacancies, and the high carrier mobility of the film is mainly ascribed to its continuous grain boundaries in the plate-like microcrystal morphology. The large-sized nanosheet Cu 3 SbSe 4 /nylon hybrid film (CSS MPs) exhibits a high power factor (PF) of 235.45 μW m −1 K −2 at 400 K, which is 4.23 times higher than that of the Cu 3 SbSe 4 /nylon hybrid film (CSS NPs) where Cu 3 SbSe 4 crystals are synthesized by using raw Se particles. This work reveals a novel approach to prepare plate-like Se-based semiconductors, which requires both high carrier concentration and high carrier mobility.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 86%

mentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

Dou,

Yao,

et al. 2024

ACS Appl. Mater. Interfaces

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“…This inspired us to investigate other wet-chemistry approaches for the synthesis of selenide inorganic materials. Specifically, simple amines like 1,2-ethylene diamine (EDA) have been used extensively to produce thermoelectric selenides such as Cu 3 SbSe 4 and its doped derivatives at reflux conditions. , We employed a similar approach, in which elemental Na, Se, and Sb 2 Se 3 with the stoichiometry shown in eq were dispersed in EDA and examined the impact of different reaction temperatures in the formation of the desired selenide. As Na 3 SbSe 4 is soluble in EDA within the concentration range used, the supernatant was evaporated at 150 °C in an Ar atmosphere to obtain the SSE powder. 6 Na + Sb 2 Se 3 + 5 Se → 2 Na 3 SbSe 4 …”

Section: Resultsmentioning

confidence: 99%

Scalable Synthesis of Selenide Solid-State Electrolytes for Sodium-Ion Batteries

Vaselabadi,

Palmer,

Smith

et al. 2023

Inorg. Chem.

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Solid-state sodium-ion batteries employing superionic solid-state electrolytes (SSEs) offer low manufacturing costs and improved safety and are considered to be a promising alternative to current Li-ion batteries. Solid-state electrolytes must have high chemical/electrochemical stability and superior ionic conductivity. In this work, we employed precursor and solvent engineering to design scalable and cost-efficient solution routes to produce air-stable sodium selenoantimonate (Na3SbSe4). First, a simple metathesis route is demonstrated for the production of the Sb2Se3 precursor that is subsequently used to form ternary Na3SbSe4 through two different routes: alcohol-mediated redox and alkahest amine-thiol approaches. In the former, the electrolyte was successfully synthesized in EtOH by using a similar redox solution coupled with Sb2Se3, Se, and NaOH as a basic reagent. In the alkahest approach, an amine-thiol solvent mixture is utilized for the dissolution of elemental Se and Na and further reaction with the binary precursor to obtain Na3SbSe4. Both routes produced electrolytes with room temperature ionic conductivity (∼0.2 mS cm–1) on par with reported performance from other conventional thermo-mechanical routes. These novel solution-phase approaches showcase the diversity and application of wet chemistry in producing selenide-based electrolytes for all-solid-state sodium batteries.

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Band Engineering Through Pb‐Doping of Nanocrystal Building Blocks to Enhance Thermoelectric Performance in Cu₃SbSe₄

Wan,

Xiao,

et al. 2023

Small Methods

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Developing cost‐effective and high‐performance thermoelectric (TE) materials to assemble efficient TE devices presents a multitude of challenges and opportunities. Cu3SbSe4 is a promising p‐type TE material based on relatively earth abundant elements. However, the challenge lies in its poor electrical conductivity. Herein, an efficient and scalable solution‐based approach is developed to synthesize high‐quality Cu3SbSe4 nanocrystals doped with Pb at the Sb site. After ligand displacement and annealing treatments, the dried powders are consolidated into dense pellets, and their TE properties are investigated. Pb doping effectively increases the charge carrier concentration, resulting in a significant increase in electrical conductivity, while the Seebeck coefficients remain consistently high. The calculated band structure shows that Pb doping induces band convergence, thereby increasing the effective mass. Furthermore, the large ionic radius of Pb2+ results in the generation of additional point and plane defects and interphases, dramatically enhancing phonon scattering, which significantly decreases the lattice thermal conductivity at high temperatures. Overall, a maximum figure of merit (zTmax) ≈ 0.85 at 653 K is obtained in Cu3Sb0.97Pb0.03Se4. This represents a 1.6‐fold increase compared to the undoped sample and exceeds most doped Cu3SbSe4‐based materials produced by solid‐state, demonstrating advantages of versatility and cost‐effectiveness using a solution‐based technology.

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Enhancement of the thermoelectric performance of Cu₃SbSe₄ particles by controlling morphology using exfoliated selenium nanosheets

Abstract: Copper antimony selenide (Cu3SbSe4), a ternary Cu-based material, is a promising p-type thermoelectric material. In this study, the morphology of Cu3SbSe4 particles was controlled using the shape of Se during...

Cited by 3 publications

References 56 publications

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

Scalable Synthesis of Selenide Solid-State Electrolytes for Sodium-Ion Batteries

Band Engineering Through Pb‐Doping of Nanocrystal Building Blocks to Enhance Thermoelectric Performance in Cu₃SbSe₄

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Enhancement of the thermoelectric performance of Cu3SbSe4 particles by controlling morphology using exfoliated selenium nanosheets

Abstract: Copper antimony selenide (Cu3SbSe4), a ternary Cu-based material, is a promising p-type thermoelectric material. In this study, the morphology of Cu3SbSe4 particles was controlled using the shape of Se during...

Cited by 3 publications

References 56 publications

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu3SbSe4-Based Flexible Hybrid Films

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu3SbSe4-Based Flexible Hybrid Films

Scalable Synthesis of Selenide Solid-State Electrolytes for Sodium-Ion Batteries

Band Engineering Through Pb‐Doping of Nanocrystal Building Blocks to Enhance Thermoelectric Performance in Cu3SbSe4

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Enhancement of the thermoelectric performance of Cu₃SbSe₄ particles by controlling morphology using exfoliated selenium nanosheets

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

2D Self-Assembly of Large-Sized Inorganic Nanosheets Leading to Enhanced Power Factors in Earth-Abundant Cu₃SbSe₄-Based Flexible Hybrid Films

Band Engineering Through Pb‐Doping of Nanocrystal Building Blocks to Enhance Thermoelectric Performance in Cu₃SbSe₄