Journal
ACS ENERGY LETTERS
Volume 5, Issue 2, Pages 611-622Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.9b02582
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Funding
- Australian Government through Australian Research Council (ARC)
- Australian Renewable Energy Agency (ARENA)
- ustralian National Fabrication Facility, ACT node (ANFF-ACT)
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Following recent developments in photoelectrochemical and photovoltaic-electrosynthetic systems, we present the benefits of III-V semiconductors for solar water splitting. In addition to their interesting light absorption and carrier transport properties, III-V alloys and multijunction structures enable the highest solar-to-hydrogen conversion efficiencies. However, many obstacles still stand in the way of practical realization of III-V solar water-splitting systems. Various surface protection strategies are being developed to address the instability of III-V semiconductors in an electrolyte. Meanwhile, multiple cost-reduction approaches are being implemented, including the use of solar concentration, epitaxial lift-off or spalling for substrate reuse, and monolithic or heterogeneous integration on silicon substrates. All these advances make III-V photoabsorbers a promising route toward decarbonated hydrogen production and pave the way to long-term deployment in real-world applications.
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