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Updated: Mar 15, 2026

Polycrystalline Silicon Thin-film Solar cells with Plasmonic-enhanced Light-trapping

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Published on: July 2, 2012

Protected Light-Trapping Silicon by a Simple Structuring Process for Sunlight-Assisted Water Splitting.

Lionel Santinacci¹, Maïmouna W Diouf¹, Maïssa K S Barr¹

¹Aix-Marseille Univ. , CNRS, CINaM, Marseille, France.

ACS Applied Materials & Interfaces

|August 31, 2016

Summary

This summary is machine-generated.

This study developed a novel TiO2/Si photoelectrode for efficient water oxidation. The macroporous structure enhances light absorption and photocurrent, showing promise for renewable energy applications.

Keywords:

atomic layer deposition black silicon electrochemical etching nanostructuration photoanode photoelectrochemical cells water splitting

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Area of Science:

Materials Science
Electrochemistry
Renewable Energy

Background:

Silicon (Si) is a promising material for photoelectrochemical applications.
Developing efficient and stable photoanodes for water oxidation remains a challenge.

Purpose of the Study:

To create a macroporous TiO2/Si photoelectrode with enhanced light absorption and stability for water oxidation.
To investigate the effect of TiO2 coating on the performance of porous Si in alkaline media.

Main Methods:

Fabrication of macroporous silicon via photoelectrochemical and chemical etching.
Atomic layer deposition (ALD) of TiO2 onto porous Si.
Characterization using scanning electron microscopy (SEM).
Photoelectrochemical measurements in 1 M KOH.

Main Results:

Optimized chemical etching resulted in a highly antireflective and absorbent porous Si surface.
A conformal 40 nm TiO2 layer provided protection against photocorrosion and improved wettability.
The TiO2/Si photoelectrode exhibited a negative shift in onset potential of ~400 mV and a 50% increase in photocurrent.

Conclusions:

The macroporous TiO2/Si dual-absorber is an effective photoanode for water oxidation.
The TiO2 coating enhances the stability and performance of porous Si in alkaline electrolytes.
This approach offers a promising pathway for efficient solar water splitting.