SIC OpenIR
Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials
Xie, L; Chen, YJ; Liu, RH; Song, EH; Xing, T; Deng, TT; Song, QF; Liu, JJ; Zheng, RK; Gao, X; Bai, SQ; Chen, LD
2020-02-01
Source PublicationNANO ENERGY
ISSN2211-2855
SubtypeArticle
AbstractThe enhancement of thermoelectric (TE) performance is essentially associated with optimizing the scattering effect of electron and phonon. Here, we demonstrate a stacking faults modulation strategy in GeTe materials to simultaneously realize high carrier mobility and low lattice thermal conductivity. Excess Cu doping in GeTe can significantly decrease the concentration of Ge vacancy layer and form a "vacancy/Cu-Cu/vacancy" sandwich-like stacking faults structure. As a result, the hole mobility is remarkably improved to nearly similar to 100 cm(2) V-1 s(-1) at room temperature due to the weakened carrier scattering from vacancy layer, which ensures superior electrical transport properties. Meanwhile, the sandwich-like stacking faults brings much stronger scattering effect on phonons, thus leading to extremely low lattice thermal conductivity of 0.38 W m(-1) K-1. With synergistically optimized scattering effect on carriers and phonons, a peak thermoelectric figure of merit over 2.0 is achieved in Ge0.89Cu0.06Sb0.08Te at 750 K. This work provides an effective strategy to realize selective scattering of phonons and carriers through 2D defect modulation, and makes up the important piece of multi-scale microstructure tailoring for TE materials.
DOI10.1016/j.nanoen.2019.104347
WOS KeywordTHERMAL TRANSPORT-PROPERTIES ; HIGH-PERFORMANCE ; CONDUCTIVITY ; ENHANCEMENT ; POWER ; CONVERGENCE ; SUPPRESSION ; EFFICIENCY ; FIGURE ; ALLOY
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28343
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Xie, L,Chen, YJ,Liu, RH,et al. Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials[J]. NANO ENERGY,2020.
APA Xie, L.,Chen, YJ.,Liu, RH.,Song, EH.,Xing, T.,...&Chen, LD.(2020).Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials.NANO ENERGY.
MLA Xie, L,et al."Stacking faults modulation for scattering optimization in GeTe-based thermoelectric materials".NANO ENERGY (2020).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Xie, L]'s Articles
[Chen, YJ]'s Articles
[Liu, RH]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xie, L]'s Articles
[Chen, YJ]'s Articles
[Liu, RH]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xie, L]'s Articles
[Chen, YJ]'s Articles
[Liu, RH]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.