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

Title
Si/InGaN Core/Shell Hierarchical Nanowire Arrays and their Photoelectrochemical Properties
Authors
황윤정Cheng Hao WuChris Hahn정훈의Peidong Yang
Keywords
Hierarchical nanostructure; InGaN Nanowire; Si wire; Photoanode; Solar Water Splitting; Photoelectrochemistry
Issue Date
2012-03
Publisher
Nano letters
Citation
VOL 12, NO 3, 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). Highresolution 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.
URI
http://pubs.kist.re.kr/handle/201004/42732
ISSN
15306984
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KIST Publication > Article
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