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Enhanced photoelectrochemical water-splitting performance of semiconductors by surface passivation layers

Liu, Rui and Spurgeon, Joshua and Yang, Xiaogang (2014) Enhanced photoelectrochemical water-splitting performance of semiconductors by surface passivation layers. Energy and Environmental Science, 2014 (7). pp. 2504-2517. ISSN 1754-5692. http://resolver.caltech.edu/CaltechAUTHORS:20140804-092046492

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Abstract

An important approach for solving the world's sustainable energy challenges is the conversion of solar energy to chemical fuels. Semiconductors can be used to convert/store solar energy to chemical bonds in an energy-dense fuel. Photoelectrochemical (PEC) water-splitting cells, with semiconductor electrodes, use sunlight and water to generate hydrogen. Herein, recent studies on improving the efficiency of semiconductor-based solar water-splitting devices by the introduction of surface passivation layers are reviewed. We show that passivation layers have been used as an effective strategy to improve the charge-separation and transfer processes across semiconductor–liquid interfaces, and thereby increase overall solar energy conversion efficiencies. We also summarize the demonstrated passivation effects brought by these thin layers, which include reducing charge recombination at surface states, increasing the reaction kinetics, and protecting the semiconductor from chemical corrosion. These benefits of passivation layers play a crucial role in achieving highly efficient water-splitting devices in the near future.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://pubs.rsc.org/en/content/articlelanding/2014/ee/c4ee00450gPublisherArticle
http://dx.doi.org/10.1039/C4EE00450GDOIArticle
Additional Information:© 2014 The Royal Society of Chemistry. Received 8th February 2014. Accepted 30th May 2014. The authors would like to acknowledge Dr. Bruce S. Brunschwig from Molecular Materials Research Center in California Institution of Technology for his valuable comments and suggestions to improve the manuscript. This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, and Xuchang University, as follows: Rui Liu and Joshua Spurgeon are supported through the Office of Science of the U.S. Department of Energy under Award no. DESC0004993; Zhi Zheng and Xiaogang Yang are supported by Henan Province office of education (14B150013), Innovation Scientists and Technicians Troop Construction Projects of Henan Province (Grant no. 144200510014) and National Natural Science Foundation of China under Grant no. 21273192.
Group:JCAP
Funders:
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Henan Province office of education14B150013
Henan Province Technicians Troop Construction Projects144200510014
National Natural Science Foundation of China21273192
Record Number:CaltechAUTHORS:20140804-092046492
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140804-092046492
Official Citation:Enhanced photoelectrochemical water-splitting performance of semiconductors by surface passivation layers Rui Liu, Zhi Zheng, Joshua Spurgeon and Xiaogang Yang Energy Environ. Sci., 2014, 7, 2504-2517 DOI: 10.1039/C4EE00450G
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47876
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:04 Aug 2014 17:04
Last Modified:09 Jan 2017 04:18

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