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Selective generation of Ag interstitial defects in Te-rich Bi2(Te,Se)3 using Ag nanoparticles causing significant improvement in thermoelectric performance

Title
Selective generation of Ag interstitial defects in Te-rich Bi2(Te,Se)3 using Ag nanoparticles causing significant improvement in thermoelectric performance
Authors
Kim, ChamJeong, Soo YeolLopez, David HumbertoKim, Dong HwanKim, Ho Young
DGIST Authors
Kim, ChamKim, Dong HwanKim, Ho Young
Issue Date
2018-02
Citation
Scripta Materialia, 144, 36-39
Type
Article
Article Type
Article
Keywords
Crystal defectsDefectsMetal nanoparticlesNanoparticlesPoint defectsSynthesis (chemical)ThermoelectricityTransport propertiesAnti-site defectInterstitial defectsInterstitialsPhonon-glass electron-crystalsSelective generationThermo-Electric materialsThermoelectric performanceThermoelectric transport propertiesSilver
ISSN
1359-6462
Abstract
We report significant enhancement in thermoelectric performance of n-type Bi2(Te,Se)3 prepared via conventional melting process. We deposited chemically synthesized Ag nanoparticles onto Te-rich Bi2(Te,Se)3 and sintered the resulting substance to obtain a bulk product. The Ag nanoparticles and excessive Te elements should be converted to interstitial and antisite defects in the product, respectively, which possibly interacted to vary thermoelectric transport properties of the product. We endeavored to balance the concentration of the defects to optimize the properties, and thus we strengthened phonon glass electron crystal characteristic of the product, resulting in the improvement in thermoelectric performance. © 2017 Acta Materialia Inc.
URI
http://hdl.handle.net/20.500.11750/4989
DOI
10.1016/j.scriptamat.2017.09.040
Publisher
Acta Materialia Inc
Related Researcher
Files:
There are no files associated with this item.
Collection:
Magnet-Controlled Materials Research Group1. Journal Articles
ETC1. Journal Articles


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