Journal
CHEMSUSCHEM
Volume 10, Issue 22, Pages 4324-4341Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201701674
Keywords
electrochemistry; photochemistry; semiconductors; silicon; solar-to-chemicals conversion
Funding
- National Natural Science Foundation of China [21573230, 21633010]
- 973 National Basic Research Program of the Ministry of Science and Technology [2014CB239400]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB17000000]
- Fundamental Research Funds for the Central Universities [2016CBZ002]
- Changjiang Scholar and Innovative Research Team
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Photoelectrochemical (PEC) technology for the conversion of solar energy into chemicals requires cost-effective photoelectrodes to efficiently and stably drive anodic and/or cathodic half-reactions to complete the overall reactions for storing solar energy in chemical bonds. The shared properties among semiconducting photoelectrodes and photovoltaic (PV) materials are light absorption, charge separation, and charge transfer. Earth-abundant silicon materials have been widely applied in the PV industry, and have demonstrated their efficiency as alternative photoabsorbers for photoelectrodes. Many efforts have been made to fabricate silicon photoelectrodes with enhanced performance, and significant progress has been achieved in recent years. Herein, recent developments in crystalline and thin-film silicon-based photoelectrodes (including amorphous, microcrystalline, and nanocrystalline silicon) immersed in aqueous solution for PEC hydrogen production from water splitting are summarized, as well as applications in PEC CO2 reduction and PEC regeneration of discharged species in redox flow batteries. Silicon is an ideal material for the cost-effective production of solar chemicals through PEC methods.
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