Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion

Wu, Hong; Peng, Kunling; Zhang, B.; Gong, Xiangnan; Feng, Zhenzhen; Zhang, X.M.; Xi, Ming; Yan, Xiangmei; Zhang, Y.S.; Wang, G.Y.; Lu, Xu; Zhou, Xiaoyuan

doi:10.1016/j.mtphys.2020.100221

Cited by 25 publications

(21 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, atomic bonding in most materials is anharmonic with various strengths of anharmonicity 48–55 . Strong anharmonicity causes intrinsic phonon scattering due to Umklapp processes (U‐processes) and determines the intrinsically low κ lat in materials with multidimensional crystal structures 28,29,34,51,56–62 …”

Section: Introductionmentioning

confidence: 99%

Slowing down the heat in thermoelectrics

Qin

Wang

Zhao

2021

InfoMat

View full text Add to dashboard Cite

Heat transport has various applications in solid materials. In particular, the thermoelectric technology provides an alternative approach to traditional methods for waste heat recovery and solid‐state refrigeration by enabling direct and reversible conversion between heat and electricity. For enhancing the thermoelectric performance of the materials, attempts must be made to slow down the heat transport by minimizing their thermal conductivity (κ). In this study, a continuously developing heat transport model is reviewed first. Theoretical models for predicting the lattice thermal conductivity (κlat) of materials are summarized, which are significant for the rapid screening of thermoelectric materials with low κlat. Moreover, typical strategies, including the introduction of extrinsic phonon scattering centers with multidimensions and internal physical mechanisms of materials with intrinsically low κlat, for slowing down the heat transport are outlined. Extrinsic defect centers with multidimensions substantially scatter various‐frequency phonons; the intrinsically low κlat in materials with various crystal structures can be attributed to the strong anharmonicity resulting from weak chemical bonding, resonant bonding, low‐lying optical modes, liquid‐like sublattices, off‐center atoms, and complex crystal structures. This review provides an overall understanding of heat transport in thermoelectric materials and proposes effective approaches for slowing down the heat transport to depress κlat for the enhancement of thermoelectric performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Slowing down the heat in thermoelectrics

Qin

Wang

Zhao

2021

InfoMat

View full text Add to dashboard Cite

show abstract

“…In SnS 0.5 Se 0.5 , 5s 2 lone-pairs of Sn are more localized than in SnS and strengthen the anisotropy of Fermi surface and lattice anharmonicity. 145…”

Section: Reduction Of Thermal Conductivity (κ)mentioning

confidence: 99%

“…As a result of In/Mn co-doping, ZT = 1.03 was achieved in Sn 0.89 In 0.01 Mn 0.1 Te at 923 K. 171 Se- substitution caused larger atomic mass and smaller force constants and, therefore, low phonon group velocity for SnS 0.5 Se 0.5 . 145…”

Section: Reduction Of Thermal Conductivity (κ)mentioning

confidence: 99%

“…On the other hand, Na doping optimized carrier concentration. 145 Using DFT calculations, Xiao et al found that doping of p-type SnS by aliovalent dopants like Sb and Bi are not effective in transforming its conduction in n-type, but isovalent Pb-substitution of the Sn sites can change the type of majority carriers and make the conduction in SnS n-type. 343 Later experimentally, it was shown that isovalent Pb substitution on Sn-sites of polycrystalline SnS thin films on glass substrates gives rise to n-type conduction with carrier concentration ∼ 10 12 cm −3 to ∼10 15 cm −3 .…”

Section: Sn Chalcogenides As Te Materialsmentioning

confidence: 99%

See 1 more Smart Citation

General strategies to improve thermoelectric performance with an emphasis on tin and germanium chalcogenides as thermoelectric materials

2022

View full text Add to dashboard Cite

show abstract

“…Moreover, SbCrSe 3 exhibits intrinsically low κ L [15], indicating that it could be a promising thermoelectric material following electrical property optimization [25][26][27][28][29][30]. Regardless, the underlying physics for the low thermal conductivity of SbCrSe 3 , which relies on the analysis of phonon modes, remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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

Gong

Peng

et al. 2021

Sci. China Mater.

View full text Add to dashboard Cite

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.

show abstract

Realizing high thermoelectricity in polycrystalline tin sulfide via manipulating fermi surface anisotropy and phonon dispersion

Cited by 25 publications

References 54 publications

Slowing down the heat in thermoelectrics

Slowing down the heat in thermoelectrics

General strategies to improve thermoelectric performance with an emphasis on tin and germanium chalcogenides as thermoelectric materials

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

Contact Info

Product

Resources

About