Facile <i>in situ</i> solution synthesis of SnSe/rGO nanocomposites with enhanced thermoelectric performance

Huang, Lisi; Lü, Jing; Ma, Duowen; Ma, Chunmiao; Zhang, Bin; Wang, Hengyang; Wang, Guoyu; Gregory, Duncan H.; Zhou, Xiaoyuan; Han, Guang

doi:10.1039/c9ta11737g

Cited by 134 publications

(72 citation statements)

References 70 publications

(77 reference statements)

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“…5d, the thermal conductivities are dominated by the phonons with short mean free paths (MFPs), and the MFPs with a 50% accumulation of κ L are only ∼18 and 5 nm at 100 and 300 K, respectively, thereby indicating that multiscale structural engineering should 8) and ( 9), and the corresponding fitting line shown in Fig. 4b, c Mode ω 0 (cm [46][47][48][49].…”

Section: Articlesmentioning

confidence: 98%

Identification of vibrational mode symmetry and phonon anharmonicity in SbCrSe3 single crystal using Raman spectroscopy

Gong

Peng

et al. 2021

Sci. China Mater.

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Developing an understanding of the physics underlying vibrational phonon modes, which are strongly related to thermal transport, has attracted significant research interest. Herein, we report the successful synthesis of bulk SbCrSe 3 single crystal and its thermal transport property over the temperature range from 2 to 300 K. Using angle-resolved polarized Raman spectroscopy (ARPRS) and group theory calculation, the vibrational symmetry of each observed Raman mode in the cleaved (00l) crystal plane of SbCrSe 3 is identified for the first time, and then further verified through firstprinciples calculations. The ARPRS results of some Raman modes (e.g., A g 2~6 4 cm −1 and A g 7~1 85 cm −1 ) can be adopted to determine the crystalline orientation. More importantly, the temperature dependence of the lattice thermal conductivity (κ L ) is revealed to be more accurately depicted by the three-phonon scattering processes throughout the measured temperature range, substantiated by in-situ Raman spectroscopy analysis and the model-predicted κ L . These results reveal the fundamental physics of thermal transport for SbCrSe 3 from a completely new perspective and should thus ignite research interest in the thermal properties of other lowdimensional materials using the same strategy.

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Section: Articlesmentioning

confidence: 98%

Identification of vibrational mode symmetry and phonon anharmonicity in SbCrSe3 single crystal using Raman spectroscopy

Gong

Peng

et al. 2021

Sci. China Mater.

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“…Bismuth(III) 2-ethyl hexanoate was used as a cationic dopant precursor to solution synthesize n-type Bi-doped SnSe to reach a Seebeck coefficient of ≈900 μV K −1 at room temperature [ 65 ]. Another work used a controlled single-step solution method to synthesize SnSe/eGO (reduced graphene oxide) nanocomposites to yield a very low lattice thermal conductivity of 0.36 Wm −1 K −1 and maximum ZT of 0.91 at 823 K [ 66 ]. This solution processing the TE materials in nanostructured forms enables the effective use of printing technologies for superior throughput fabrication of cost-effective and flexible thermoelectric devices.…”

Section: Various Synthesis and Fabrication Techniques For Large-scale Productionmentioning

confidence: 99%

Synthesis and Performance of Large-Scale Cost-Effective Environment-Friendly Nanostructured Thermoelectric Materials

2021

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Thermoelectricity is a promising technology that directly converts heat energy into electricity and finds its use in enormous applications. This technology can be used for waste heat recovery from automobile exhausts and industrial sectors and convert the heat from solar energy, especially in hot and humid areas such as Qatar. The large-scale, cost-effective commercialization of thermoelectric generators requires the processing and fabrication of nanostructured materials with quick, easy, and inexpensive techniques. Moreover, the methods should be replicable and reproducible, along with stability in terms of electrical, thermal, and mechanical properties of the TE material. This report summarizes and compares the up-to-date technologies available for batch production of the earth-abundant and ecofriendly materials along with some notorious works in this domain. We have also evaluated and assessed the pros and cons of each technique and its effect on the properties of the materials. The simplicity, time, and cost of each synthesis technique have also been discussed and compared with the conventional methods.

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“…[ 24,31–34 ] However, due to the strong coupling between these parameters, the optimization of thermal/electrical transport properties is the key for ZT enhancement. [ 35–40 ] The performance of thermoelectric materials can be enhanced from the two aspects: 1) optimization of electrical transportation performance and 2) minimization of thermal transport properties. [ 41–48 ]…”

Section: Introductionmentioning

confidence: 99%

High‐Performance GeTe‐Based Thermoelectrics: from Materials to Devices

Liu

Wang

et al. 2020

Advanced Energy Materials

197

128

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m ), [52] enlarging band degeneracy (N V ), [43] and introducing resonant energy levels, [26] can also tune n p effectively. Taking Ge 1−x−y Sb x Zn y Te as an example, Zn doping can reduce the energy offset (ΔE) between L and Σ point. [52] The minimization of thermal transport properties is mainly achieved through suppressing the electrical property-independent κ l . [53][54][55][56][57] Thermoelectric materials with High-performance GeTe-based thermoelectrics have been recently attracting growing research interest. Here, an overview is presented of the structural and electronic band characteristics of GeTe. Intrinsically, compared to lowtemperature rhombohedral GeTe, the high-symmetry and high-temperature cubic GeTe has a low energy offset between L and Σ points of the valence band, the reduced direct bandgap and phonon group velocity, and as a result, high thermoelectric performance. Moreover, their thermoelectric performance can be effectively enhanced through either carrier concentration optimization, band structure engineering (bandgap reduction, band degeneracy, and resonant state engineering), or restrained lattice thermal conductivity (phonon velocity reduction or phonon scattering). Consequently, the dimensionless figure of merit, ZT values, of GeTe-based thermoelectric materials can be higher than 2. The mechanical and thermal stabilities of GeTe-based thermoelectrics are highlighted, and it is found that they are suitable for practical thermoelectric applications except for their high cost. Finally, it is recognized that the performance of GeTe-based materials can be further enhanced through synergistic effects. Additionally, proper material selection and module design can further boost the energy conversion efficiency of GeTe-based thermoelectrics.

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Facile in situ solution synthesis of SnSe/rGO nanocomposites with enhanced thermoelectric performance

Abstract: SnSe/rGO nanocomposites can be synthesised in situ via a facile solution method; once sintered, the lattice thermal conductivity and ZT of the composites are significantly reduced and enhanced respectively compared to SnSe itself.

Cited by 134 publications

References 70 publications

Identification of vibrational mode symmetry and phonon anharmonicity in SbCrSe3 single crystal using Raman spectroscopy

Identification of vibrational mode symmetry and phonon anharmonicity in SbCrSe3 single crystal using Raman spectroscopy

Synthesis and Performance of Large-Scale Cost-Effective Environment-Friendly Nanostructured Thermoelectric Materials

High‐Performance GeTe‐Based Thermoelectrics: from Materials to Devices

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