Low temperature thermoelectric power factors of thermally evaporated Ag2Se thin films

Jindal, Silky; Singh, Sukhdeep; Saini, G. S. S.; Tripathi, S. K.

doi:10.1063/5.0001841

Cited by 4 publications

(6 citation statements)

References 10 publications

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“…The content of Se is slightly decreased after annealing, as shown in EDS results (Table S1), suggesting that the aggravation of element diffusion during the annealing process led to the strength of Ag clusters and the loss of Se. Similar phenomenon is also reported by Jindal et al [30,32].…”

Section: Resultssupporting

confidence: 90%

“…Thermal evaporation method is one of the most commonly used vacuum physical vapor deposition techniques that have been reported for preparing excellent TE performance thin lms, such as Bi 2 Te 3 , Cu 2 Se and Sb 2 Se 3 [27][28][29]. However, Ag 2 Se thin lms prepared by this method has low power factor [30][31][32]. Optimization of the carrier concentration and mobility can effectively improve the thermoelectric performance of TE thin lms to some extent [33].…”

Section: Introductionmentioning

confidence: 99%

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Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

Zheng

Zhang

Niu

et al. 2022

Materials Today Energy

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

Zheng

Zhang

Niu

et al. 2022

Materials Today Energy

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“…This type of mixed lattice structure has been reported to exhibit liquid-like behavior, which promotes a high carrier concentration due to the mobility of Ag ions. The coexistence of α and β phases introduces disorder in the lattice structure, which annihilates the mobility of carriers and causes a decrease in electrical conductivity, σ. , …”

Section: Resultsmentioning

confidence: 99%

A Recipe for a Great Meal: A Benchtop Route from Elemental Se to Superior Thermoelectric β-Ag₂Se

Abusa,

Yox,

Viswanathan

et al. 2024

J. Am. Chem. Soc.

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The low-temperature modification of β-Ag 2 Se has proven to be useful as a near-room-temperature thermoelectric material. Over the past years, research has been devoted to interstitial, vacancy, and substitutional doping into the parent β-Ag 2 Se structure, aiming at tuning the material's charge and heat transport properties to enhance thermoelectric performance. The transformation of β-Ag 2 Se into α-Ag 2 Se at ∼134 °C and the low solubility of dopants are the main obstacles for the doping approach. Herein, we report a facile, safe, scalable, and cost-effective benchtop approach to successfully produce metal-doped β-Ag 2 Se. The doped materials display a remarkable enhancement of thermoelectric performance with a record-high peak zT of 1.30 at 120 °C and an average zT of ∼1.15 in the 25−120 °C range for 0.2 at. % Zn-doped Ag 2 Se. The enhancement in zT is attributed to point defects created by Zn doping into Ag vacancies/interstitials, which enhances the scattering of phonons and tunes the charge carrier properties, leading to the significant suppression of thermal conductivity. The simplicity of the synthetic method developed herein and the high performance of the final products provide an avenue to produce high-quality Ag 2 Se-based thermoelectric materials.

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“…These methods are also capable of producing materials of different phases in binary and tertiary systems. Jindal et al 118 used the thermal evaporation technique in a vacuum to fabricate thin films of Ag 2 Se with a particle size of 36.2 nm. The authors discussed the dependence of σ on temperature.…”

Section: Inorganic Chalcogenide Nanostructures For Thermoelectricsmentioning

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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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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Low temperature thermoelectric power factors of thermally evaporated Ag2Se thin films

Cited by 4 publications

References 10 publications

Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

A Recipe for a Great Meal: A Benchtop Route from Elemental Se to Superior Thermoelectric β-Ag₂Se

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

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Low temperature thermoelectric power factors of thermally evaporated Ag2Se thin films

Cited by 4 publications

References 10 publications

Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

Achieving ultrahigh power factor in n-type Ag2Se thin films by carrier engineering

A Recipe for a Great Meal: A Benchtop Route from Elemental Se to Superior Thermoelectric β-Ag2Se

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

Contact Info

Product

Resources

About

A Recipe for a Great Meal: A Benchtop Route from Elemental Se to Superior Thermoelectric β-Ag₂Se