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.
曹诗瑶, 闫小琴. GaAs材料在光电化学电池中的稳定性[J]. 材料导报, 2021, 35(5): 5062-5066.
CAO Shiyao, YAN Xiaoqin. The Stability of GaAs in Photoelectrochemical Cells. Materials Reports, 2021, 35(5): 5062-5066.
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