Advancing flexible thermoelectrics for integrated electronics

Shi, Xiao-Lei; Wang, Lijun; Lyu, Wanyu; Cao, Tianyi; Chen, Wenyi; Hu, Boxuan; Chen, Zhi-Gang

doi:10.1039/d4cs00361f

Chem. Soc. Rev.

2024

DOI: 10.1039/d4cs00361f

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Advancing flexible thermoelectrics for integrated electronics

Xiao-Lei Shi,

Lijun Wang,

Wanyu Lyu

et al.

Abstract: This review offers a comprehensive examination of the advancements, challenges, and future prospects in multifunctional integrated energy conversion and storage technologies, focusing on flexible thermoelectrics.

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Cited by 8 publications

References 475 publications

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Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

Wu,

Shi,

Mao

et al. 2024

Advanced Science

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Due to its inherent ductility, Ag2S shows promise as a flexible thermoelectric material for harnessing waste heat from diverse sources. However, its thermoelectric performance remains subpar, and existing enhancement strategies often compromise its ductility. In this study, a novel Sn‐doping‐induced biphasic structuring approach is introduced to synergistically control electron and phonon transport. Specifically, Sn‐doping is incorporated into Ag2S0.7Se0.3 to form a biphasic composition comprising (Ag, Sn)2S0.7Se0.3 as the primary phase and Ag2S0.7Se0.3 as the secondary phase. This biphasic configuration achieves a competitive figure‐of‐merit ZT of 0.42 at 343 K while retaining exceptional ductility, exceeding 90%. The dominant (Ag, Sn)2S0.7Se0.3 phase bolsters the initially low carrier concentration, with interfacial boundaries between the phases effectively mitigating carrier scattering and promoting carrier mobility. Consequently, the optimized power factor reaches 5 µW cm−1 K−2 at 343 K. Additionally, the formation of the biphasic structure induces diverse micro/nano defects, suppressing lattice thermal conductivity to a commendable 0.18 W m−1 K−1, thereby achieving optimized thermoelectric performance. As a result, a four‐leg in‐plane flexible thermoelectric device is fabricated, exhibiting a maximum power density of ≈49 µW cm−2 under the temperature difference of 30 K, much higher than that of organic‐based flexible thermoelectric devices.

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Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

Wu,

Shi,

Mao

et al. 2024

Advanced Science

View full text Add to dashboard Cite

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High‐Performing Flexible Mg₃Bi₂ Thin‐Film Thermoelectrics

Hu,

Shi,

Cao

et al. 2024

Advanced Science

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With the advances in bulk Mg3Bi2, there is increasing interest in pursuing whether Mg3Bi2 can be fabricated into flexible thin films for wearable electronics to expand the practical applications. However, the development of fabrication processes for flexible Mg3Bi2 thin films and the effective enhancement of their thermoelectric performance remain underexplored. Here, magnetron sputtering and ex‐situ annealing techniques is used to fabricate flexible Mg3Bi2 thermoelectric thin films with a power factor of up to 1.59 µW cm−1 K−2 at 60 °C, ranking as the top value among all reported n‐type Mg3Bi2 thin films. Extensive characterizations show that ex‐situ annealing, and optimized sputtering processes allow precise control over film thickness. These techniques ensure high adhesion of the films to various substrates, resulting in excellent flexibility, with <10% performance degradation after 500 bending cycles with a radius of 5 mm. Furthermore, for the first time, flexible thermoelectric devices are fabricated with both p‐type and n‐type Mg3Bi2 legs, which achieve an output power of 0.17 nW and a power density of 1.67 µW cm−2 at a very low temperature difference of 2.5 °C, highlighting the practical application potential of the device.

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High-performance thermoelectric PEDOT:PSS fiber bundles via rational ionic liquid treatment

Deng,

Shi,

et al. 2024

Chemical Engineering Journal

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Advancing flexible thermoelectrics for integrated electronics

Abstract: This review offers a comprehensive examination of the advancements, challenges, and future prospects in multifunctional integrated energy conversion and storage technologies, focusing on flexible thermoelectrics.

Cited by 8 publications

References 475 publications

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

High‐Performing Flexible Mg₃Bi₂ Thin‐Film Thermoelectrics

High-performance thermoelectric PEDOT:PSS fiber bundles via rational ionic liquid treatment

Contact Info

Product

Resources

About

Advancing flexible thermoelectrics for integrated electronics

Abstract: This review offers a comprehensive examination of the advancements, challenges, and future prospects in multifunctional integrated energy conversion and storage technologies, focusing on flexible thermoelectrics.

Cited by 8 publications

References 475 publications

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag2S‐Based Thermoelectrics

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag2S‐Based Thermoelectrics

High‐Performing Flexible Mg3Bi2 Thin‐Film Thermoelectrics

High-performance thermoelectric PEDOT:PSS fiber bundles via rational ionic liquid treatment

Contact Info

Product

Resources

About

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

Sn‐Doping‐Induced Biphasic Structure Advances Ductile Ag₂S‐Based Thermoelectrics

High‐Performing Flexible Mg₃Bi₂ Thin‐Film Thermoelectrics