期刊
NANO ENERGY
卷 12, 期 -, 页码 215-223出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2014.12.033
关键词
InGaN/GaN nanowires; Multi-quantum well; Nanoscale photoanode; Water splitting; Hydrogen energy
类别
资金
- National Research Foundation of Korea (NRF) - Korean Government [NRF-2013R1A1A2059179]
In an attempt to partially mimic the natural photosynthesis, a process that converts sunlight into chemical fuel, a novel InGaN/GaN multi-quantum well (MQW) nanowire heterostructures photoanode with superior surface-to-volume ratio was designed. The light harvesting medium in this nanoscale architecture is a thick MQW composed of six periods of epitaxial InGaN/GaN shells deposited coaxially on the semipolar sidewall facets of a thin GaN core nanowire. High aspect ratio and wide photoresponse extended to the visible spectrum were demonstrated from the detailed characterizations of the as-grown nanowires. The result revealed that this nanoscale photoanode can convert up to 8.6% of the illuminating light into photocurrent that can be utilized for the facile generation of hydrogen fuel with a 0.21% solar-to-hydrogen conversion efficiency, which is comparable to that of the natural photosynthesis. (C) 2014 Elsevier Ltd. All rights reserved.
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