Realizing high thermoelectric performance in magnetic field-assisted solution synthesized nanoporous SnSe integrated with quantum dots

Li, Shuang; Hou, Yunxiang; Zhang, Shihua; Gong, Yaru; Siddique, Suniya; Li, Di; Fang, Jun; Nan, Pengfei; Ge, Binghui; Tang, Guodong

doi:10.1016/j.cej.2022.138637

Cited by 9 publications

(7 citation statements)

References 54 publications

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“…The increased interfaces arising from micro/nanopores cause strong phonon scattering. [65,66] Combining extra phonon scattering from Mn-rich The Peak ZT of Mn 0.98 Cu 0.04 Ag 0.04 Te is one of the highest peak ZT for MnTe system reported so far [42,44,53,[67][68][69] (Figure 6b).…”

Section: Resultsmentioning

confidence: 76%

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Lattice Distortions and Multiple Valence Band Convergence Contributing to High Thermoelectric Performance in MnTe

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Wang

Zhang

et al. 2022

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Here, a new route is proposed for the minimization of lattice thermal conductivity in MnTe through considerable increasing phonon scattering by introducing dense lattice distortions. Dense lattice distortions can be induced by Cu and Ag dopants possessing large differences in atom radius with host elements, which causes strong phonon scattering and results in extremely low lattice thermal conductivity. Density functional theory (DFT) calculations reveal that Cu and Ag codoping enables multiple valence band convergence and produces a high density of state values in the electronic structure of MnTe, contributing to the large Seebeck coefficient. Cu and Ag codoping not only optimizes the Seebeck coefficient but also substantially increases the carrier concentration and electrical conductivity, resulting in the significant enhancement of power factor. The maximum power factor reaches 11.36 µW cm−1K−2 in Mn0.98Cu0.04Ag0.04Te. Consequently, an outstanding ZT of 1.3 is achieved for Mn0.98Cu0.04Ag0.04Te by these synergistic effects. This study provides guidelines for developing high‐performance thermoelectric materials through the rational design of effective dopants.

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Section: Resultsmentioning

confidence: 76%

“…The increased interfaces arising from micro/nanopores cause strong phonon scattering. [ 65,66 ] Combining extra phonon scattering from Mn‐rich nanoprecipitates and dislocations, Mn 0.98 Cu 0.04 Ag 0.04 Te sample shows significantly reduced κ L .…”

Section: Resultsmentioning

confidence: 99%

Lattice Distortions and Multiple Valence Band Convergence Contributing to High Thermoelectric Performance in MnTe

Xiong

Wang

Zhang

et al. 2022

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“…Normally, good thermoelectric materials are heavily doped semiconductors 4,5 which possess the characteristics of large thermopower ( S ), moderate electrical conductivity ( σ ) and low levels of total thermal conductivity ( κ T ). Many kinds of thermoelectric materials, such as SnSe, 6,7 BiSbTe, 8,9 SnTe 10–12 and half-Heuslers, 13,14 have been widely studied in recent years. Half-Heusler alloys are well known for their good thermal stability, excellent mechanical properties, environmental safety and so on.…”

Section: Introductionmentioning

confidence: 99%

Ultralow lattice thermal conductivity and improved thermoelectric performance in a Hf-free half-Heusler compound modulated by entropy engineering

et al. 2023

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“…[27][28][29][30][31][32][33][34] In addition, CQDs offer a tunable density of grain boundaries that can be exploited to suppress thermal transport, providing an effective approach to reducing the thermal conductivity of thin films. [26,[35][36][37][38][39] These appealing features make CQDs a promising building block for application in efficient thermoelectric generators (TEGs) operating near room temperature (RT). [40][41][42] Semiconducting CQDs have witnessed a rapid improvement in their thermoelectric performance, nearing the performance of conventional bulk thermoelectric systems based on bismuth telluride (Bi 2 Te 3 ).…”

Section: Introductionmentioning

confidence: 99%

“…[ 27–34 ] In addition, CQDs offer a tunable density of grain boundaries that can be exploited to suppress thermal transport, providing an effective approach to reducing the thermal conductivity of thin films. [ 26,35–39 ] These appealing features make CQDs a promising building block for application in efficient thermoelectric generators (TEGs) operating near room temperature (RT). [ 40–42 ]…”

Section: Introductionmentioning

confidence: 99%

Recent Progress in Colloidal Quantum Dot Thermoelectrics

et al. 2023

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Semiconducting colloidal quantum dots (CQDs) represent an emerging class of thermoelectric materials for use in a wide range of future applications. CQDs combine solution processability at low temperatures with the potential for upscalable manufacturing via printing techniques. Moreover, due to their low dimensionality, CQDs exhibit quantum confinement and a high density of grain boundaries, which can be independently exploited to tune the Seebeck coefficient and thermal conductivity, respectively. This unique combination of attractive attributes makes CQDs very promising for application in emerging thermoelectric generator (TEG) technologies operating near room temperature. Herein, recent progress in CQDs for application in emerging thin‐film thermoelectrics is reviewed. First, the fundamental concepts of thermoelectricity in nanostructured materials are outlined, followed by an overview of the popular synthetic methods used to produce CQDs with controllable sizes and shapes. Recent strides in CQD‐based thermoelectrics are then discussed with emphasis on their application in thin‐film TEGs. Finally, the current challenges and future perspectives for further enhancing the performance of CQD‐based thermoelectric materials for future applications are discussed.

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Realizing high thermoelectric performance in magnetic field-assisted solution synthesized nanoporous SnSe integrated with quantum dots

Cited by 9 publications

References 54 publications

Lattice Distortions and Multiple Valence Band Convergence Contributing to High Thermoelectric Performance in MnTe

Lattice Distortions and Multiple Valence Band Convergence Contributing to High Thermoelectric Performance in MnTe

Ultralow lattice thermal conductivity and improved thermoelectric performance in a Hf-free half-Heusler compound modulated by entropy engineering

Recent Progress in Colloidal Quantum Dot Thermoelectrics

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