Modulating structures to decouple thermoelectric transport leads to high performance in polycrystalline SnSe

Wang, Yuping; Bai, Shulin; Shi, Haonan; Cao, Qian; Qin, Bingchao; Zhao, Li-Dong

doi:10.1039/d3ta06373a

J. Mater. Chem. A

2024

DOI: 10.1039/d3ta06373a

|View full text |Cite

Modulating structures to decouple thermoelectric transport leads to high performance in polycrystalline SnSe

Yuping Wang,

Shulin Bai,

Haonan Shi

et al.

Abstract: Introducing AgInSe2 modifies the crystal and band structures to facilitate electrical transport of SnSe, and Ge alloying further depresses phonon transport. The effective phonon-electron decoupling leads to an ultrahigh ZT ∼ 1.6 at 773 K.

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2024

2025

Publication Types

Select...

Article5

Relationship

Self Cite0

Independent5

Authors

Journals

Cited by 8 publications

References 66 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Metavalent Bonding in Cubic SnSe Alloys Improves Thermoelectric Properties over a Broad Temperature Range

Lin,

Han,

Ghosh

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Monocrystalline SnSe is one of the most promising thermoelectric materials with outstanding performance and a high abundance of constituting elements. However, polycrystalline SnSe, which is more robust for applications, only shows large figure‐of‐merit (zT) values in its high‐symmetry phase. Stabilizing the high‐symmetry phase at low temperatures can thus enhance the average zT value over a broad temperature range. In this work, the high‐symmetry rock‐salt SnSe phase is successfully obtained by alloying SnSe with AgVVI2 compounds (V = Sb, Bi; VI = Se, Te). These cubic SnSe phases show a unique portfolio of properties including a high optical dielectric constant, a large maximum of optical absorption, a large Born effective charge, and abnormal bond‐breaking behavior in laser‐assisted atom probe tomography. All of these characteristics are indicative of metavalent bonding. In contrast, the Pnma phase of SnSe employs covalent bonding. The enhanced symmetry at low temperatures is realized by tailoring chemical bonding. Concomitantly, zT near room temperature is increased by a factor of more than 10 from the pristine Pnma SnSe to Fmm SnSe alloys. This provides insights into the enhancement of the thermoelectric performance of SnSe and other chalcogenides over a broad temperature range by manipulating the chemical bonds.

show abstract

Metavalent Bonding in Cubic SnSe Alloys Improves Thermoelectric Properties over a Broad Temperature Range

Lin,

Han,

Ghosh

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

Ultrahigh average zT realized in polycrystalline SnSe0.95 materials through Sn stabilizing and carrier modulation

Yang,

Shi,

Bao

et al. 2025

Journal of Materiomics

View full text Add to dashboard Cite

Boosting thermoelectric performance of polycrystalline SnSe by controlled in-situ Ag2Se precipitates in grain boundaries

Yang,

Wang,

Bao

et al. 2025

Journal of Materials Science & Technology

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Modulating structures to decouple thermoelectric transport leads to high performance in polycrystalline SnSe

Abstract: Introducing AgInSe2 modifies the crystal and band structures to facilitate electrical transport of SnSe, and Ge alloying further depresses phonon transport. The effective phonon-electron decoupling leads to an ultrahigh ZT ∼ 1.6 at 773 K.

Cited by 8 publications

References 66 publications

Metavalent Bonding in Cubic SnSe Alloys Improves Thermoelectric Properties over a Broad Temperature Range

Metavalent Bonding in Cubic SnSe Alloys Improves Thermoelectric Properties over a Broad Temperature Range

Ultrahigh average zT realized in polycrystalline SnSe0.95 materials through Sn stabilizing and carrier modulation

Boosting thermoelectric performance of polycrystalline SnSe by controlled in-situ Ag2Se precipitates in grain boundaries

Contact Info

Product

Resources

About