Jump to main content
Jump to site search

Issue 5, 2018
Previous Article Next Article

Highly-ordered silicon nanowire arrays for photoelectrochemical hydrogen evolution: an investigation on the effect of wire diameter, length and inter-wire spacing

Author affiliations

Abstract

Vertically-aligned, highly-ordered silicon nanowire (SiNW) array photocathodes are fabricated employing e-beam lithography followed by deep reactive ion etching (DRIE) of Si. The effect of structural parameters of SiNWs, including wire diameter, length and inter-wire spacing, on their photoelectrocatalytic hydrogen evolution performance has been systematically investigated. Within the range of dimensions under study, the SiNW photocathode with a wire diameter of 200 nm, a length of 1 μm and an inter-wire spacing of 175 nm shows the best performance exhibiting a maximal saturated photocurrent density of 52 mA cm−2 and an onset potential (@−1 mA cm−2) of −0.17 V versus reversible hydrogen electrode. These lithography-patterned SiNWs with homogeneous structural parameters can help establish an unobscured structure–activity relation and facilitate Si-based photoelectrode design.

Graphical abstract: Highly-ordered silicon nanowire arrays for photoelectrochemical hydrogen evolution: an investigation on the effect of wire diameter, length and inter-wire spacing

Back to tab navigation

Supplementary files

Publication details

The article was received on 08 Dec 2017, accepted on 07 Mar 2018 and first published on 08 Mar 2018


Article type: Paper
DOI: 10.1039/C7SE00591A
Citation: Sustainable Energy Fuels, 2018,2, 978-982
  •   Request permissions

    Highly-ordered silicon nanowire arrays for photoelectrochemical hydrogen evolution: an investigation on the effect of wire diameter, length and inter-wire spacing

    S. M. Thalluri, J. Borme, D. Xiong, J. Xu, W. Li, I. Amorim, P. Alpuim, J. Gaspar, H. Fonseca, L. Qiao and L. Liu, Sustainable Energy Fuels, 2018, 2, 978
    DOI: 10.1039/C7SE00591A

Search articles by author

Spotlight

Advertisements