title: Large-area ordered P-type Si nanowire arrays as photocathode for highly efficient photoelectrochemical hydrogen generation.
abstract: In this Article, we report the successful fabrication of large-area ordered Si nanowire arrays (NWAs) by a cost-effective and scalable wet-etching process in combination with nanospheres lithography technique. The periodical Si NWAs are further investigated as photocathode for water splitting, with excellent hydrogen evolution performances with a maximum photocurrent density of 27 mA cm(-2) achieved, which is ∼2.5 times that of planar Si and random Si nanowires electrode. The greatly improved PEC performance can be attributed to the patterned and ordered NWs structure as a result of enhancement of the light harvesting as well as charge transportation and collection efficiency.
authors.affiliation: State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures (Ministry of Education) and Department of Physics, Fudan University , Shanghai 200433, People's Republic of China.
authors.forename: Shufan
authors.initials: S
authors.lastname: Huang
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhang
authors.forename: Zilong
authors.initials: Z
authors.lastname: Wu
authors.forename: Dezi
authors.initials: D
authors.lastname: Kong
authors.forename: Dongdong
authors.initials: D
authors.lastname: Lin
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Fan
authors.forename: Xinju
authors.initials: X
authors.lastname: Yang
authors.forename: Zhenyang
authors.initials: Z
authors.lastname: Zhong
authors.forename: Shihua
authors.initials: S
authors.lastname: Huang
authors.forename: Zuimin
authors.initials: Z
authors.lastname: Jiang
authors.forename: Chuanwei
authors.initials: C
authors.lastname: Cheng