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Issue 12, 2017
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Pulsed laser-deposited n-Si/NiOx photoanodes for stable and efficient photoelectrochemical water splitting

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Abstract

An electrocatalytic and stable nickel oxide (NiOx) thin layer was successfully deposited on an n-Si (100) substrate by pulsed laser deposition (PLD), acting as a photoanode for efficient photo-oxidation of water under solar illumination. It was revealed that the formed n-Si/NiOx heterojunction with good Schottky contact could improve photogenerated charge separation, and thus n-Si photoanodes deposited with a 105 nm-thick NiOx electrocatalytic layer exhibited a photovoltage of ∼350 mV, leading to greatly improved photoelectrochemical performances for water oxidation. The stability of the photoanode was significantly enhanced with the increasing thickness of NiOx protective layers. This study demonstrates a simple and effective method to enable the use of planar n-Si (100) substrates as efficient and durable photoanodes for practical solar water oxidation.

Graphical abstract: Pulsed laser-deposited n-Si/NiOx photoanodes for stable and efficient photoelectrochemical water splitting

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Supplementary files

Article information


Submitted
19 Jan 2017
Accepted
14 May 2017
First published
15 May 2017

Catal. Sci. Technol., 2017,7, 2632-2638
Article type
Paper

Pulsed laser-deposited n-Si/NiOx photoanodes for stable and efficient photoelectrochemical water splitting

L. He, W. Zhou, D. Cai, S. S. Mao, K. Sun and S. Shen, Catal. Sci. Technol., 2017, 7, 2632 DOI: 10.1039/C7CY00114B

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