Vacancy and anti-site disorder scattering in AgBiSe2 thermoelectrics

2017 ◽  
Vol 46 (12) ◽  
pp. 3906-3914 ◽  
Author(s):  
Felix Böcher ◽  
Sean P. Culver ◽  
Jan Peilstöcker ◽  
Kai S. Weldert ◽  
Wolfgang G. Zeier
Keyword(s):  
Thermal Conductivity ◽  
Point Defect ◽  
Lattice Thermal Conductivity ◽  
Site Disorder ◽  
Disorder Scattering

Ag vacancies in AgBiSe2 influence Ag–Bi anti-site disorder and provide point defect scattering, reducing the lattice thermal conductivity.

scholarly journals Intrinsic nanostructure induced ultralow thermal conductivity yields enhanced thermoelectric performance in Zintl phase Eu2ZnSb2

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chen Chen ◽  
Zhenzhen Feng ◽  
Honghao Yao ◽  
Feng Cao ◽  
Bing-Hua Lei ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
Lattice Thermal Conductivity ◽  
High Mobility ◽  
Partial Ordering ◽  
Thermoelectric Performance ◽  
Local Order ◽  
Conductivity Measurements ◽  
Zintl Phase ◽  
Site Disorder

AbstractThe Zintl thermoelectric phase Eu2ZnSb2 has a remarkable combination of high mobility and low thermal conductivity that leads to good thermoelectric performance. The key feature of this compound is a crystal structure that has a Zn-site with a 50% occupancy. Here we use comparison of experimental thermal conductivity measurements and first principles thermal conductivity calculations to characterize the thermal conductivity reduction. We find that partial ordering, characterized by local order, but Zn-site disorder on longer scales, leads to an intrinsic nanostructuring induced reduction in thermal conductivity, while retaining electron mobility. This provides a direction for identifying Zintl compounds with ultralow lattice thermal conductivity and good electrical conductivity.

scholarly journals Correction to Extremely Low Lattice Thermal Conductivity and Point Defect Scattering of Phonons in Ag-doped (SnSe)1–x(SnS)x Compounds

2017 ◽  
Vol 29 (22) ◽  
pp. 9859-9859
Author(s):  
Chan-Chieh Lin ◽  
Lydia Rathnam ◽  
Jae Hyun Yun ◽  
Ho Seong Lee ◽  
Jong-Soo Rhyee
Keyword(s):  
Thermal Conductivity ◽  
Point Defect ◽  
Lattice Thermal Conductivity

Effect of Te substitution on crystal structure and transport properties of AgBiSe2thermoelectric material

2018 ◽  
Vol 47 (8) ◽  
pp. 2575-2580 ◽  
Author(s):  
Y. Goto ◽  
A. Nishida ◽  
H. Nishiate ◽  
M. Murata ◽  
C. H. Lee ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thermal Conductivity ◽  
Transport Properties ◽  
Point Defect ◽  
Lattice Thermal Conductivity ◽  
Scattering Model

Reduced lattice thermal conductivity of Te-substituted AgBiSe2was qualitatively described using the point defect scattering model.

scholarly journals Co-regulation of the copper vacancy concentration and point defects leading to the enhanced thermoelectric performance of Cu3In5Te9-based chalcogenides

RSC Advances ◽  
2019 ◽  
Vol 9 (54) ◽  
pp. 31747-31752 ◽  
Author(s):  
Min Li ◽  
Yong Luo ◽  
Xiaojuan Hu ◽  
Zhongkang Han ◽  
Xianglian Liu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Point Defect ◽  
Carrier Concentration ◽  
Point Defects ◽  
Lattice Thermal Conductivity ◽  
Vacancy Concentration ◽  
Thermoelectric Performance ◽  
High Carrier Concentration ◽  
High Carrier

Co-regulation of both the copper vacancy concentration (Vc) and point defect GaIn realizing the high carrier concentration and low lattice thermal conductivity in Cu3In5Te9-based chalcogenides simultaneously.

Extremely Low Lattice Thermal Conductivity and Point Defect Scattering of Phonons in Ag-doped (SnSe)1–x(SnS)x Compounds

2017 ◽  
Vol 29 (12) ◽  
pp. 5344-5352 ◽  
Author(s):  
Chan-Chieh Lin ◽  
R. Lydia ◽  
Jae Hyun Yun ◽  
Ho Seong Lee ◽  
Jong Soo Rhyee
Keyword(s):  
Thermal Conductivity ◽  
Point Defect ◽  
Lattice Thermal Conductivity

Lattice Thermal Conductivity Modelling of a Diatomic Nanoscale Material

2020 ◽  
Vol 10 (5) ◽  
pp. 602-609
Author(s):  
Adil H. Awad
Keyword(s):  
Thermal Conductivity ◽  
Lattice Thermal Conductivity ◽  
Phonon Scattering ◽  
Correction Term ◽  
Nanoscale Material ◽  
New Approach ◽  
Two Samples ◽  
Conductivity Modelling ◽  
Callaway Model

Introduction: A new approach for expressing the lattice thermal conductivity of diatomic nanoscale materials is developed. Methods: The lattice thermal conductivity of two samples of GaAs nanobeam at 4-100K is calculated on the basis of monatomic dispersion relation. Phonons are scattered by nanobeam boundaries, point defects and other phonons via normal and Umklapp processes. Methods: A comparative study of the results of the present analysis and those obtained using Callaway formula is performed. We clearly demonstrate the importance of the utilised scattering mechanisms in lattice thermal conductivity by addressing the separate role of the phonon scattering relaxation rate. The formulas derived from the correction term are also presented, and their difference from Callaway model is evident. Furthermore their percentage contribution is sufficiently small to be neglected in calculating lattice thermal conductivity. Conclusion: Our model is successfully used to correlate the predicted lattice thermal conductivity with that of the experimental observation.

Sign in / Sign up

Export Citation Format

Share Document