Enhanced thermoelectric performance of n-type Bi2Te3 alloyed with low cost and highly abundant sulfur

Malik, Iram; Srivastava, Tanuja; Surthi, Kiran Kumar; Gayner, Chhatrasal; Kar, Kamal K.

doi:10.1016/j.matchemphys.2020.123598

Cited by 36 publications

(9 citation statements)

References 47 publications

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“…Malik et al studied the properties of sulfur-doped Bi 2 Te 3 compounds synthesized via a melting method. Sulfur creates dislocation and an increase in the lattice strain in the compounds.…”

Section: Inorganic Chalcogenide Nanostructures For Thermoelectricsmentioning

confidence: 99%

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Comprehensive Insights into Synthesis, Structural Features, and Thermoelectric Properties of High-Performance Inorganic Chalcogenide Nanomaterials for Conversion of Waste Heat to Electricity

Manjunatha¹,

Mulla

Nagaraj³

et al. 2022

ACS Appl. Energy Mater.

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Thermoelectrics are energy harvesters that can directly convert waste heat into electrical energy and vice versa. Currently, thermoelectric (TE) devices display lower efficiency as the materials used for construction possess a very low figure of merit (ZT). Therefore, understanding the structural features of materials, finding new materials, and analyzing their chemistry and physics play a vital role in enhancing their energy conversion efficiency. Among the different classes of TE materials, some inorganic chalcogenides are perfect candidates for power generation as they possess excellent TE properties. The objective of this review is to provide insights into structural features and innovative methods to obtain enhanced thermoelectric properties of selected inorganic chalcogenides. The review covers recent advances in preparation methods, structural features, and thermoelectric properties of selected metal selenides (Bi2Se3, Ag2Se, SnSe, etc.) and metal tellurides (Bi2Te3, SnTe, PbTe, etc.). The review also discusses the critical parameters for designing and optimizing the TE materials to obtain the required electrical conductivity (σ), Seebeck coefficient (S), and thermal conductivity (k). In addition, promising mechanistic approaches to be adopted for enhancing the efficiency of TE materials such as doping, alloying, and nanostructuring are discussed in detail. Finally, a summary that describes advancements in the materials design is provided with a prospect for future applications from these materials in the development of energy harvesting technology.

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“…Malik et al studied the properties of sulfur-doped Bi 2 Te 3 compounds synthesized via a melting method. Sulfur creates dislocation and an increase in the lattice strain in the compounds.…”

Section: Inorganic Chalcogenide Nanostructures For Thermoelectricsmentioning

confidence: 99%

“…They obtained a very good ZT value by excess doping of Te, i.e., Bi 2 Te 2.41 Se 0.6 of 1 at 420 K, as shown in Figure 9q. Malik et al 142 studied the properties of sulfur-doped Bi 2 Te 3 compounds synthesized via a melting method. Sulfur creates dislocation and an increase in the lattice strain in the compounds.…”

Section: Metal Telluridesmentioning

confidence: 99%

Comprehensive Insights into Synthesis, Structural Features, and Thermoelectric Properties of High-Performance Inorganic Chalcogenide Nanomaterials for Conversion of Waste Heat to Electricity

Manjunatha¹,

Mulla

Nagaraj³

et al. 2022

ACS Appl. Energy Mater.

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show abstract

“…It is usually a defect that occurs when lattice points in adjacent positions in the lattice of a material swap places, and the intrinsic defect usually introduces electrons or vacancies. For bismuth telluride materials, in addition to the intrinsic tellurium volatilization, the inversion of the Bi and Te atoms is a common intrinsic defect, and researchers used these two in-trinsic defects to construct n-type and p-type bismuth telluride-based thermoelectric materials [139] . Anti-location defects have not been reported in Bi 2 S 3 thermoelectric materials.…”

Section: Point Defectsmentioning

confidence: 99%

Bi2S3 as a Promising ThermoelectricMaterial:Back and Forth

Ge¹

2022

MatLab

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Thermoelectric conversion technology based on thermoelectric materials can directly convert heatandelectricity and is extensively used in waste heat recovery, semiconductor refrigeration, and spaceexploration.Currently, bismuth telluride (Bi2Te3) thermoelectric materials are the best in terms of room-temperatureperformance and have been commercialized. Compared with commercial Bi2Te3 thermoelectricmaterialsofthe same family (III-VI group), bismuth sulfide (Bi2S3) thermoelectric materials have the uniqueadvantagesof being abundant, low-cost, and environmentally friendly. However, the thermoelectric propertiesofBi2S3are limited by its low electrical conductivity. In recent years, with the development of preparationmethodsand characterization tools, many studies have emerged to improve the thermoelectric propertiesofBi2S3materials. Herein, the preparation of Bi2S3 thermoelectric materials and the implications of theprocessontheir thermoelectric properties are summarized. The advances made in composition, structureandotherstrategies to optimize the thermoelectric properties of Bi2S3 are highlighted, and the current challengesforthe development of Bi2S3 thermoelectric materials and potential future research directions are alsodiscussed.Keywords: Bi2S3, thermoelectric, nanorods, electrical conductivity

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“…With the increased use of cost-effective and highly abundant materials, thermoelectric technology plays a vital role as a sustainable energy solution. [17][18][19] However, it has always been challenging to design thermoelectric materials with high efficiency. This requires a deep understanding of the fundamentals of each parameter and sub-parameter of the materials properties.…”

Section: Abbreviationsmentioning

confidence: 99%

A Review on Fundamentals, Design and Optimization to High ZT of Thermoelectric Materials for Application to Thermoelectric Technology

Kumar

Bano

Govind

et al. 2021

J. Electron. Mater.

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Thermoelectricity has been proven as a potential technology for the conversion of waste heat into usable electricity. It involves primarily three parameters, namely the Seebeck coefficient, electrical conductivity, and thermal conductivity. However, there are many other interrelated parameters, such as carrier concentration, mobility, effective mass, multi-valley bands, relaxation time, reduced Fermi energy, phonon modes, scattering parameters, and the number of neighbouring atoms in a given structure. The understanding of these parameters is equally important in order to optimize a high figure of merit (ZT). This article addresses the basics of electronic and thermal transport with the help of Boltzmann transport equation, fundamental concepts for the design of thermoelectric (TE) materials, and implementation of several strategies such as alloying, the phonon-glass electron-crystal (PGEC) approach, band engineering and nanostructuring to optimize the ZT of materials, and finally ends with a discussion of the future prospects of heat extraction through different heat sources.

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Enhanced thermoelectric performance of n-type Bi2Te3 alloyed with low cost and highly abundant sulfur

Cited by 36 publications

References 47 publications

Comprehensive Insights into Synthesis, Structural Features, and Thermoelectric Properties of High-Performance Inorganic Chalcogenide Nanomaterials for Conversion of Waste Heat to Electricity

Comprehensive Insights into Synthesis, Structural Features, and Thermoelectric Properties of High-Performance Inorganic Chalcogenide Nanomaterials for Conversion of Waste Heat to Electricity

Bi2S3 as a Promising ThermoelectricMaterial:Back and Forth

A Review on Fundamentals, Design and Optimization to High ZT of Thermoelectric Materials for Application to Thermoelectric Technology

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