Electron Microscopy for Characterization of Thermoelectric Nanomaterials

Wu, Haijun; He, Jiaqing

doi:10.1007/978-3-642-38934-4_10

Cited by 1 publication

(1 citation statement)

References 118 publications

(247 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microstructures of both thermoelectric materials and superconductors have considerable influences on their physical properties. − Typical thermoelectric examples are embedded nanoscale precipitates in bulk materials that scatter heat-carrying phonons, e.g., PbTe-SrTe , and PbS-PbTe, which reduce κ to enhance ZT. High power factors have been realized in the CoSb 3 skutterudites by adjusting the total filling fraction of fillers in the nanoscale cages with different charge states; in addition, lattice thermal conductivity can also be significantly reduced .…”

Section: Introductionmentioning

confidence: 99%

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

et al. 2016

View full text Add to dashboard Cite

Microstructural analyses based on aberration-corrected scanning transmission electron microscopy (STEM) observations demonstrate that low-dimensional CsBiTe materials, known to be a novel thermoelectric and superconducting system, contain notable structural channels that go directly along the b axis, which can be partially filled by atom clusters depending on the thermal treatment process. We successfully prepared two series of CsBiTe single-crystalline samples using two different sintering processes. The CsBiTe samples prepared using an air-quenching method show superconductivity at approximately 4 K, while the CsBiTe with the same nominal compositions prepared by slowly cooling are nonsuperconductors. Moreover, atomic structural investigations of typical samples reveal that the structural channels are often empty in superconducting materials; thus, we can represent the superconducting phase as CsBiTe with considering the point defects in the Cs layers. In addition, the channels in the nonsuperconducting crystals are commonly partially occupied by triplet Bi clusters. Moreover, the average structures for these two phases are also different in their monoclinic angles (β), which are estimated to be 102.3° for superconductors and 100.5° for nonsuperconductors.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

et al. 2016

View full text Add to dashboard Cite

show abstract

Electron Microscopy for Characterization of Thermoelectric Nanomaterials

Cited by 1 publication

References 118 publications

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

Contact Info

Product

Resources

About

Electron Microscopy for Characterization of Thermoelectric Nanomaterials

Cited by 1 publication

References 118 publications

Structural Channels and Atomic-Cluster Insertion in CsxBi4Te6 (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

Structural Channels and Atomic-Cluster Insertion in CsxBi4Te6 (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

Contact Info

Product

Resources

About

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy

Structural Channels and Atomic-Cluster Insertion in Cs_xBi₄Te₆ (1 ≤ x ≤ 1.25) As Observed by Aberration-Corrected Scanning Transmission Electron Microscopy