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Jeong, Hoon Eui
Multiscale Biomimetics & Manufacturing Lab
Research Interests
  • Biomimetics

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Si/InGaN Core/Shell Hierarchical Nanowire Arrays and their Photoelectrochemical Properties

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Title
Si/InGaN Core/Shell Hierarchical Nanowire Arrays and their Photoelectrochemical Properties
Author
Hwang, Yun JeongWu, Cheng HaoHahn, ChrisJeong, Hoon EuiYang, Peidong
Keywords
Hierarchical nanostructure; InGaN nanowire; photoanode; Si wire; solar water splitting
Issue Date
201203
Publisher
AMER CHEMICAL SOC
Citation
NANO LETTERS, v.12, no.3, pp.1678 - 1682
Abstract
Three-dimensional hierarchical nanostructures were synthesized by the halide chemical vapor deposition of InGaN nanowires on Si wire arrays. Single phase InGaN nanowires grew vertically on the sidewalls of Si wires and acted as a high surface area photoanode for solar water splitting. Electrochemical measurements showed that the photocurrent density with hierarchical Si/InGaN nanowire arrays increased by 5 times compared to the photocurrent density with InGaN nanowire arrays grown on planar Si (1.23 V vs RHE). High-resolution transmission electron microscopy showed that InGaN nanowires are stable after 15 h of illumination. These measurements show that Si/InGaN hierarchical nanostructures are a viable high surface area electrode geometry for solar water splitting.
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DOI
http://dx.doi.org/10.1021/nl3001138
ISSN
1530-6984
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