Core-shell Si sub(1-x)Ge sub(x) nanowires with controlled structural defects for phonon scattering enhancement

We demonstrate for the first time core-shell Si sub(1-x)Ge sub(x) alloy nanowires that can suppress the phonon propagation in nanowires without reducing the electrical conductivity. Non-uniformly distributed structural defects in the outer shells of the Si sub(1-x)Ge sub(x) nanowires enhance boundar...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-07, Vol.2 (31), p.12153-12157
Main Authors: Lee, Jong Woon, Lee, Junho, Yi, Su-in, Seo, Young Min, Choi, Byoung Lyong, Yu, Choongho, Yang, Cheol-Woong, Hwang, Sungwoo, Kim, Sungjin, Whang, Dongmok, Lee, Eun Kyung
Format: Article
Language:English
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Summary:We demonstrate for the first time core-shell Si sub(1-x)Ge sub(x) alloy nanowires that can suppress the phonon propagation in nanowires without reducing the electrical conductivity. Non-uniformly distributed structural defects in the outer shells of the Si sub(1-x)Ge sub(x) nanowires enhance boundary scattering during phonon transport, while a defect-free core provides a current path for electrical carriers.
ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta01880j