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题名: High density Si/ZnO core/shell nanowire arrays for photoelectrochemical water splitting
作者: Ji, Jiuyu1;  Zhang, Wenhua2;  Zhang, Heqiu1;  Qiu, Yu1;  Wang, Yan3;  Luo, Yingmin1;  Hu, Lizhong1
刊名: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
发表日期: 2013-09-01
DOI: 10.1007/s10854-013-1272-5
卷: 24, 期:9, 页:3474-3480
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology ;  Physical Sciences
类目[WOS]: Engineering, Electrical & Electronic ;  Materials Science, Multidisciplinary ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Engineering ;  Materials Science ;  Physics
英文摘要: Si/ZnO core/shell nanowire (NW) arrays were fabricated using atomic layer deposition of ZnO shell on n-Si NW arrays prepared by metal assisted electroless etching method. Scanning electron microscopy, transmission electron microscopy and X-ray diffraction were utilized to characterize the core/shell structures. Water splitting performance of the core/shell structures was preliminarily studied. The Si/ZnO core/shell NW arrays yielded significantly higher photocurrent density than the planar Si/ZnO structure due to their low reflectance and high surface area. The photoelectrochemical efficiency was found to be 0.035 and 0.002 % for 10 mu m-long Si/ZnO NW array and planar Si/ZnO sample, respectively. These results suggested that core/shell structure is superior to planar heterojunction for PEC electrode design. We demonstrated the dependence of photocurrent density on the length of the core/shell array, and analyzed the reasons why longer NW arrays could produce higher photocurrent density. The relationship between the thickness of ZnO shell and the photoconversion efficiency of Si/ZnO NW arrays was also discussed. By applying the core/shell structure in electrode design, one may be able to improve the photoelectrochemical efficiency and photovoltaic device performance.
关键词[WOS]: VISIBLE-LIGHT ;  PHOTOVOLTAIC APPLICATIONS ;  TITANIUM-DIOXIDE ;  SILICON ;  PHOTOCATALYST ;  ABSORPTION ;  ZNO ;  FABRICATION ;  ELECTRODE ;  SURFACE
语种: 英语
WOS记录号: WOS:000323249800049
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137713
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
3.Liaoning Normal Univ, Sch Phys & Elect Technol, Dalian 116029, Peoples R China

Recommended Citation:
Ji, Jiuyu,Zhang, Wenhua,Zhang, Heqiu,et al. High density Si/ZnO core/shell nanowire arrays for photoelectrochemical water splitting[J]. JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS,2013,24(9):3474-3480.
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