Entropy engineering: An innovative strategy for designing high-performance thermoelectric materials and devices

Moshwan, Raza; Shi, Xiao-Lei; Liu, Wei-Di; Liu, Jian; Chen, Zhi-Gang

doi:10.1016/j.nantod.2024.102475

Nano Today

2024

DOI: 10.1016/j.nantod.2024.102475

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Entropy engineering: An innovative strategy for designing high-performance thermoelectric materials and devices

Raza Moshwan,

Xiao-Lei Shi,

Wei-Di Liu

et al.

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Cited by 9 publications

References 174 publications

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Compromising Configurational Entropy Leading to Exceptional Thermoelectric Properties in SnTe‐Based Materials

Moshwan,

Zhang,

et al. 2024

Adv Funct Materials

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Incorporating multiple atoms with different masses and radii at distinct atomic sites within a lattice matrix can increase its entropy and, in turn, enable a synergistic approach to both band structure and microstructure engineering. Modifying the band structure enhances electrical transport properties, while changes in the microstructure effectively suppress thermal transport properties, leading to significantly improved thermoelectric performance. Here, entropy engineering is employed to enhance the thermoelectric performance of the SnTe material system. The synergistic alloying of Ge, Mn, and In significantly alters the electronic band structure by merging four valence bands namely L, Σ, Λ, and X, and creating a resonant energy state near the Fermi level, resulting in an outstanding Seebeck coefficient of ≈97 µV K−1 at room temperature. The high density of point defects, Ge secondary phases, amorphous interfaces, phono–phonon interactions, and grain boundaries significantly disrupts the movement of heat‐carrying phonons, leading to an exceptionally low lattice thermal conductivity of 0.32 W m−1 K−1, pushing it below the amorphous limit. Consequently, a peak figure of merit of 1.64 achieves at 873 K in Sn0.71Ge0.2Mn0.07In0.02Te. These findings lay the groundwork for developing advanced thermoelectric materials via entropy engineering.

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Compromising Configurational Entropy Leading to Exceptional Thermoelectric Properties in SnTe‐Based Materials

Moshwan,

Zhang,

et al. 2024

Adv Funct Materials

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Recent Progress in SnTe: An Eco‐Friendly and High‐Performance Chalcogenide Thermoelectric Material

Kihoi,

Yang,

Lee

2024

Small

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Recent advances in high‐performance thermoelectric materials have sparked significant interest, particularly in SnTe, a mid‐temperature group‐IV chalcogenide that is both eco‐friendly and cost‐effective. However, compared to other group‐IV chalcogenides, there remains a substantial scope for enhancing the thermoelectric performance of SnTe. In the past four years (since 2020), numerous compelling reports have proposed novel strategies to narrow this gap and boost the performance of SnTe‐based materials, thereby building upon previous advancements. These recent advancements are comprehensively summarized in this timely review. This review reports three essential facets critical to the advancement of high‐performance SnTe materials: electrical properties, thermal properties, and the overly overlooked mechanical properties. First, a brief theoretical exposition is presented, subsequently detailing empirically verified techniques for achieving superior SnTe‐based materials. The intrinsic prevalence of tin vacancies (VSn) in SnTe classifies it as a p‐type thermoelectric material. Here, it is unveiled for the first time, recent significant breakthroughs in the development of n‐type SnTe. This advancement enables the development of an all‐SnTe‐based thermoelectric device. Additional attention is devoted to emerging trends that further amplify the performance of SnTe. With persistent efforts, achieving a ZT greater than 2 in SnTe‐based materials is inevitable.

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Advances and challenges in hybrid photovoltaic-thermoelectric systems for renewable energy

Moshwan,

Shi,

Zhang

et al. 2025

Applied Energy

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Entropy engineering: An innovative strategy for designing high-performance thermoelectric materials and devices

Cited by 9 publications

References 174 publications

Compromising Configurational Entropy Leading to Exceptional Thermoelectric Properties in SnTe‐Based Materials

Compromising Configurational Entropy Leading to Exceptional Thermoelectric Properties in SnTe‐Based Materials

Recent Progress in SnTe: An Eco‐Friendly and High‐Performance Chalcogenide Thermoelectric Material

Advances and challenges in hybrid photovoltaic-thermoelectric systems for renewable energy

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