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나노 구조 물리 연구단
나노구조물리 연구단
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Strong correlation between the crystal structure and the thermoelectric properties of pavonite homologue Cux+yBi5-yCh8 (Ch = S or Se) compounds

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Title
Strong correlation between the crystal structure and the thermoelectric properties of pavonite homologue Cux+yBi5-yCh8 (Ch = S or Se) compounds
Author(s)
Jae-Yeol Hwang; Min-Wook Oh; Kyu Hyoung Lee; Kim, S.W.
Publication Date
2015-11
Journal
JOURNAL OF MATERIALS CHEMISTRY C, v.3, no.43, pp.11271 - 11285
Publisher
ROYAL SOC CHEMISTRYROYAL SOC CHEMISTRY
Abstract
Complex structured semiconducting compounds are promising thermoelectric materials due to their inherently low thermal conductivities. It has been demonstrated that the limited phonon mean free path with structural complexities such as a large unit cell, disorders, or a variety of atom types resulted in low lattice thermal conductivity. However, there is still a missing piece to elucidate which structural component manipulates the transport properties effectively. Herein we review our recent progress on the thermoelectric properties of the intrinsically disordered system, pavonite homologue Cux+yBi5-yCh8 (Ch = S or Se). Through the controlled tuning of composition and occupancy for each atomic site based on the comprehensive structural analysis, we found that the structural factor (occupancy of interstitial Cu) could be a critical basis for determining both electronic and thermal transport properties. Also, we present a short overview of common structural traits inhibiting phonon propagation in complex structured thermoelectric materials. This consideration outlines a strategy to search for new high performance complex structured thermoelectric materials in relation with the possibilities of their chemical and structural modifications. This journal is © The Royal Society of Chemistry
URI
https://pr.ibs.re.kr/handle/8788114/2264
ISSN
2050-7526
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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