GaAs材料在光电化学电池中的稳定性

doi:10.11896/cldb.20020107

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Abstract Photoelectrochemical water splitting is renowned as artificial photosynthesis. It converts solar energy and splits water into hydrogen and oxygen. It is a potentially important energy conversion method for future sustainable energy systems. With the development of photoelectroche-mical cells, the energy conversion efficiency improved greatly. However, the lifetime of the photoelectrochemical cell is far from the actual application standard of 10 years.
The excellent photo-physical properties have brought the Ⅲ-Ⅴ semiconductor GaAs under the spotlight. However, GaAs suffers from serious photocorrosion in photoelectrochemical systems. How to improve its stability in electrolyte under the premise of giving full play to its inherent advantages has become a research hotspot of Ⅲ-Ⅴ semiconductors in recent years. Studies have shown that designing different protective films to protect GaAs according to the corrosion mechanism of GaAs electrodes in different environments can effectively extend the lifetime of GaAs electrodes while ensuring conversion efficiency.
This article starts from the corrosion mechanism of GaAs materials in different acid and alkaline electrolytes, and summarizes the effective protection measures of GaAs in different solution environments. This review focuses on the results of existing methods for improving the stability of GaAs materials in solution. Moreover, the future development of GaAs in photoelectrochemical field is prospected.

Key words： GaAs photocorrosion stability protection layer photoelectrochemical water splitting

Published: 12 March 2021

CLC number:

TB303

About author:: Xiaoqin Yan received her B.S. degree in materials science and engineering from Taiyuan University of Technology in 1997. She got her Ph.D. degree from Institute of Physics, Chinese Academy of Sciences in 2004. She holds a postdoc position at the Institute for Materials Research, Tohoku University. She was promoted to full professor in 2007 at University of Science & Technology Beijing. Her research interests include fabrication and characterization of patterned nanomaterials, design and application of energy conversion and storage devices/system
Shiyao Cao received her Ph.D. degree from University of Science and Technology Beijing in 2020. Her research focuses on fabrication of one dimensional nanomaterials and photoelectrochemical water splitting.
Shiyao Cao received her Ph.D. degree from University of Science and Technology Beijing in 2020. Her research focuses on fabrication of one dimensional nanomaterials and photoelectrochemical water splitting.

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Cite this article:

CAO Shiyao,YAN Xiaoqin. The Stability of GaAs in Photoelectrochemical Cells[J]. Materials Reports, 2021, 35(5): 5062-5066.

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http://www.mater-rep.com/EN/10.11896/cldb.20020107 OR http://www.mater-rep.com/EN/Y2021/V35/I5/5062

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