Interfacial engineering of CuWO4/WO3 thin films precisely fabricated by ultrasonic spray pyrolysis for improved solar water splitting

Feng Cao; Yuhan Sun; Xiaoyu Duan

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Interfacial engineering of CuWO4/WO3 thin films precisely fabricated by ultrasonic spray pyrolysis for improved solar water splitting

机译：Interfacial engineering of CuWO4/WO3 thin films precisely fabricated by ultrasonic spray pyrolysis for improved solar water splitting

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Herein, we proposed the interfacial engineering of CuWO4/WO3 thin film to improve the photoelectrochemical (PEC) performance for solar water splitting. Our theoretical calculation reveals the significantly accelerated charge separation in CuWO4/WO3 heterojunction due to an in situ formed built-in electric field. Accordingly, an efficient ultrasonic spray pyrolysis technique was developed to readily fabricate the heterostructural CuWO4/WO3 thin films on FTO glass substrates with accurately tunable thickness and composition. The resultant CuWO4/WO3 photoanode with an optimized CuWO4/WO3 composition (1:1) and thickness (～4.0 μm) shows a high and stable photocurrent density of 0.66 mA cm~(-2) (1.23 V vs. RHE) under AM 1.5 G illumination, which is ～15 times higher than that of the CuWO4 thin films (0.042 mA cm~(-2)). The significantly enhanced light absorption and accelerated photoexcited charge separation and transfer enabled by the CuWO4/WO3 heterojunction are deemed to largely account for the highly improved PEC performance of the CuWO4/WO3 film for solar water splitting.

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来源
《Catalysis science & technology》 |2023年第15期|4550-4557|共8页
作者
Feng Cao; Yuhan Sun; Xiaoyu Duan;
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作者单位

Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Material Science and Engineering, Northeastern University, Shenyang 110819, China;

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正文语种英语
中图分类物理化学（理论化学）、化学物理学;
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Interfacial engineering of CuWO4/WO3 thin films precisely fabricated by ultrasonic spray pyrolysis for improved solar water splitting

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