Effect of post-annealing treatment on the thermoelectric properties of Ag2Se flexible thin film prepared by magnetron sputtering method

Zang, Junbin; Ma, Yuexuan; Zhao, Yaxin; Guo, Rui; Liu, Yantao; Liu, Dan; Chen, Xue

doi:10.1016/j.rinp.2023.106222

Cited by 14 publications

(6 citation statements)

References 41 publications

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“…Compared to Ag 2 S, other silver chalcogenides such as Ag 2 Se 44,[117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134] and Ag 2 Te 135,136 often exhibit higher thermoelectric performance, but their flexibility is relatively poor. 137 Figure 4A illustrates the phase diagram of the Ag 2 S-Ag 2 Se-Ag 2 Te system to show the variation of ZT and flexibility.…”

Section: Chalcogenides and Their Hybridsmentioning

confidence: 99%

“…30 Therefore, many reports focus on the improvement of ZTs for Ag 2 Se-based thin films fabricated on flexible substrates. 44,[117][118][119][120][121][122][123][124][125][126][127][128][129][130][131][132][133][134]141,[155][156][157][158][159] For example, Figure 4D illustrates a wearable F-TED composed of self-healable Ag 2 Se. 139 Such Ag 2 Se thin films were prepared on a PI substrate through magnetron sputtering, and the roomtemperature S 2 σ was increased from 17.2 to 20.8 μW cm −1 K −2 by co-sputtering a few amounts of Cu, which led to an increased n. After 1000 bending cycles with a bending radius of 5 mm, the increase of relative resistance of the film was less than 5% in the initial state, indicating a high fatigue strength.…”

Section: Chalcogenides and Their Hybridsmentioning

confidence: 99%

“…Considering that Ag 2 Se also has certain flexibility due to its ductility feature, it shows great potential for practical applications when acts as a thin film, which is similar to the applications of bismuth/antimony chalcogenide thin films 30 . Therefore, many reports focus on the improvement of ZT s for Ag 2 Se‐based thin films fabricated on flexible substrates 44,117–134,141,155–159 . For example, Figure 4D illustrates a wearable F‐TED composed of self‐healable Ag 2 Se 139 .…”

Section: Flexible Silver Chalcogenides and Their Hybridsmentioning

confidence: 99%

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Advances in flexible inorganic thermoelectrics

Shi,

Cao,

Chen

et al. 2023

EcoEnergy

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Solid‐state bismuth telluride‐based thermoelectric devices enable the generation of electricity from temperature differences and have been commercially applied in various fields. However, in many scenarios, the surface of the heat source is not flat. Therefore, it is crucial to develop flexible thermoelectric materials and devices to efficiently utilize heat sources and expand their applications. Compared with organic thermoelectric materials and devices, inorganic flexible thermoelectric materials and devices have much higher thermoelectric performance and stability. Considering the rapid development in this research field, we carefully summarize the design principles, structures, and thermoelectric properties of inorganic flexible materials and their devices reported in the recent 3 years, including sulfides, selenides, tellurides, and composite materials designed based on these inorganics. The structural designs of flexible thermoelectric devices based on micro‐sized bulk materials are also carefully summarized. Additionally, we overview the mechanical stability and methods for reducing internal resistance for designs of inorganic flexible thermoelectric devices. In the end, we provide outlooks on future research directions for inorganic flexible thermoelectric materials and devices. This review will help guide thermoelectric researchers, beginners, and students.

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Section: Chalcogenides and Their Hybridsmentioning

confidence: 99%

Section: Chalcogenides and Their Hybridsmentioning

confidence: 99%

Section: Flexible Silver Chalcogenides and Their Hybridsmentioning

confidence: 99%

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Advances in flexible inorganic thermoelectrics

Shi,

Cao,

Chen

et al. 2023

EcoEnergy

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“…(1) Vacuum-assisted filtration combined with hot pressing or heat treatment. − By this method, an Ag 2 Se film was obtained by depositing Ag 2 Se powder prepared by a Se nanowires template method on a nylon filter membrane and achieved a high PF of 1882 μW m –1 K –2 at RT after hot pressing . (2) Vapor deposition combined with heat treatment. − Vapor deposition includes chemical vapor deposition and physical vapor deposition, among which magnetron sputtering ,, (DC magnetron sputtering and radio frequency magnetron sputtering) and thermal evaporation , in physical vapor deposition are more commonly used. By magnetron sputtering, one or more targets are sputtered on a flexible substrate, followed by a reaction or heat treatment to obtain the film.…”

Section: Introductionmentioning

confidence: 99%

“…25 (2) Vapor deposition combined with heat treatment. 26−33 Vapor deposition includes chemical vapor deposition and physical vapor deposition, among which magnetron sputtering 27,28,33 (DC magnetron sputtering and radio frequency magnetron sputtering) and thermal evaporation 26,30 in physical vapor deposition are more commonly used. By magnetron sputtering, one or more targets are sputtered on a flexible substrate, followed by a reaction or heat treatment to obtain the film.…”

Section: ■ Introductionmentioning

confidence: 99%

Largely Enhanced Thermoelectric Performance of Flexible Ag₂Se Film by Cationic Doping and Dual-Phase Engineering

Liu,

Wang,

et al. 2024

ACS Appl. Mater. Interfaces

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Recent studies have shown that silver selenide is a promising thermoelectric material at room temperature. Herein, flexible films with a nominal composition of (Ag1–x Cu x )2Se are prepared by a simple and efficient one-pot method combined with vacuum-assisted filtration and hot pressing. The thermoelectric properties of the films are regulated by both cationic doping and a dual-phase strategy via a wet chemical method. As the x increases, not only Cu is doped into the Ag2Se, but different new phases (CuAgSe and/or CuSe2) also appear. The (Ag1–x Cu x )2Se film with x = 0.02 composed of Cu-doped Ag2Se and CuAgSe shows a high PF of ∼2540 μW m–1 K–2 (ZT ∼ 0.90) and outstanding flexibility at room temperature. The high thermoelectric properties of the film are due to the effect of Cu doping and the CuAgSe phase, including the increase in electrical conductivity caused by doping, the enhanced phonon scattering at the Ag2Se/CuAgSe interface, and the interaction between the energy filtering effect and the doping effect. In addition to the high output performance (PDmax = 28.08 W m–2, ΔT = 32.2 K), the flexible device assembled with the (Ag0.98Cu0.02)2Se film also has potential applications as a temperature sensor.

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Carrier Separation Boosts Thermoelectric Performance of Flexible n‐Type Ag₂Se‐Based Films

Hu,

Liu,

Zhang

et al. 2024

Advanced Energy Materials

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Owing to promising room‐temperature thermoelectric properties, n‐type Ag2Se has been considered as an alternative for Bi2Te3. Herein, a carrier separation strategy is realized by compositing an insulating electron donor, polyethyleneimine (PEI), with the n‐type Ag2Se. Inhomogeneous distribution of PEI can attract the minority carriers (holes) in the n‐type Ag2Se matrix, while the separated minority carriers can avoid significant scattering of the main carriers based on coulomb repulsion, leading to record‐high carrier mobility of 1551.99 cm2 V−1 s−1 and an improved S2σ of 22.39 µW m−1 K−2 at 300 K for 6 mol% PEI/Ag2Se composite film. Moreover, with PEI acting as a binder, the resistance of 6 mol% PEI/Ag2Se composite film only increases by 6.5% after bending 1000 cycles at the radius of 6 mm, showing high stability. The assembled flexible device based on 6 mol% PEI/Ag2Se composite films exhibits an excellent power density of 73.93 W m−2 at a temperature difference of 50 K, showing potential applications in powering generation for wearable electronics.

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Effect of post-annealing treatment on the thermoelectric properties of Ag2Se flexible thin film prepared by magnetron sputtering method

Cited by 14 publications

References 41 publications

Advances in flexible inorganic thermoelectrics

Advances in flexible inorganic thermoelectrics

Largely Enhanced Thermoelectric Performance of Flexible Ag₂Se Film by Cationic Doping and Dual-Phase Engineering

Carrier Separation Boosts Thermoelectric Performance of Flexible n‐Type Ag₂Se‐Based Films

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Effect of post-annealing treatment on the thermoelectric properties of Ag2Se flexible thin film prepared by magnetron sputtering method

Cited by 14 publications

References 41 publications

Advances in flexible inorganic thermoelectrics

Advances in flexible inorganic thermoelectrics

Largely Enhanced Thermoelectric Performance of Flexible Ag2Se Film by Cationic Doping and Dual-Phase Engineering

Carrier Separation Boosts Thermoelectric Performance of Flexible n‐Type Ag2Se‐Based Films

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Product

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Largely Enhanced Thermoelectric Performance of Flexible Ag₂Se Film by Cationic Doping and Dual-Phase Engineering

Carrier Separation Boosts Thermoelectric Performance of Flexible n‐Type Ag₂Se‐Based Films