High Density n-Si/n-TiO2 Core/Shell Nanowire Arrays with Enhanced Photoactivity

Title
High Density n-Si/n-TiO2 Core/Shell Nanowire Arrays with Enhanced Photoactivity
Authors
황윤정Akram BoukaiPeidong Yang
Keywords
core shell nanowire; n-n junction; solar water splitting; photoanode; Si; TiO2
Issue Date
2009-01
Publisher
Nano letters
Citation
VOL 9, NO 1, 410-415
Abstract
There are currently great needs to develop low-cost inorganic materials that can efficiently perform solar water splitting as photoelectrolysis of water into hydrogen and oxygen has significant potential to provide clean energy. We investigate the Si/TiO2 nanowire heterostructures to determine their potential for the photooxidation of water. We observed that highly dense Si/TiO2 core/shell nanowire arrays enhanced the photocurrent by 2.5 times compared to planar Si/TiO2 structure due to their low reflectance and high surface area. We also showed that n-Si/n-TiO2 nanowire arrays exhibited a larger photocurrent and open circuit voltage than p-Si/n-TiO2 nanowires due to a barrier at the heterojunction.
URI
http://pubs.kist.re.kr/handle/201004/42734
ISSN
15306984
Appears in Collections:
KIST Publication > Article
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