Intrinsic GaAs-engineered p-i-n GaAs/GaAs/AlGaAs nanowires for improved-performance solar water splitting
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
We demonstrate that the addition of an intrinsic GaAs shell to form a p-i-n junction with GaAs/GaAs/AlGaAs core/shells nanowire (NW) enhances the photocurrent density by fivefold compared to a conventional p-n junction with GaAs/AlGaAs NW. The GaAs/AlGaAs
material system offers distinct advantages due to its strong visible-light absorption, tunable band
structure, and compatibility with protective and catalytic overlayers, such as TiO2, which can enhance surface stability and charge separation. What we believe to be a novel photocathode structure demonstrates a one-sun photocurrent density of 0.542 mA/cm2 at an applied potential of 0.20V with respect to the reversible hydrogen electrode (RHE). This work demonstrates
the suitability of GaAs/GaAs/AlGaAs p-i-n core/shells NWs for PEC water splitting and their potential for green hydrogen production.
material system offers distinct advantages due to its strong visible-light absorption, tunable band
structure, and compatibility with protective and catalytic overlayers, such as TiO2, which can enhance surface stability and charge separation. What we believe to be a novel photocathode structure demonstrates a one-sun photocurrent density of 0.542 mA/cm2 at an applied potential of 0.20V with respect to the reversible hydrogen electrode (RHE). This work demonstrates
the suitability of GaAs/GaAs/AlGaAs p-i-n core/shells NWs for PEC water splitting and their potential for green hydrogen production.
Date Issued
2026-04-15
Date Acceptance
2026-03-12
Citation
Optics Continuum, 2026, 5 (4), pp.954-954
ISSN
2770-0208
Publisher
Optica Publishing Group
Start Page
954
End Page
954
Journal / Book Title
Optics Continuum
Volume
5
Issue
4
Copyright Statement
© 2026 Published by Optica Publishing Group under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
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Publication Status
Published
Date Publish Online
2026-03-25