Applied Catalysis2022，Vol.30111.DOI:10.1016/j.apcatb.2021.120760

Planar heterojunction boosts solar-driven photocatalytic performance and stability of halide perovskite solar photocatalyst cell

Wang, Chunhua Huang, Haowei Weng, Bo Verhaeghe, Davy Keshavarz, Masoumeh Jin, Handong Liu, Biao Xie, Haipeng Ding, Yang Gao, Yujie Yuan, Haifeng Steele, Julian A. Hofkens, Johan Roeffaers, Maarten B. J.
Applied Catalysis2022，Vol.30111.DOI:10.1016/j.apcatb.2021.120760
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  • NSTL
  • Elsevier

Planar heterojunction boosts solar-driven photocatalytic performance and stability of halide perovskite solar photocatalyst cell

Wang, Chunhua 1Huang, Haowei 2Weng, Bo 2Verhaeghe, Davy 2Keshavarz, Masoumeh 1Jin, Handong 1Liu, Biao 3Xie, Haipeng 3Ding, Yang 4Gao, Yujie 2Yuan, Haifeng 1Steele, Julian A. 2Hofkens, Johan 1Roeffaers, Maarten B. J.2
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作者信息

  • 1. Katholieke Univ Leuven, Dept Chem, Celestijnenlaan 200F, B-3001 Leuven, Belgium
  • 2. Katholieke Univ Leuven, cMACS, Dept Microbial & Mol Syst, Celestijnenlaan 200F, B-3001 Leuven, Belgium
  • 3. Cent South Univ, Sch Phys & Elect, Hunan Key Lab Super Microstruct & Ultrafast Proc, Changsha 410083, Peoples R China
  • 4. Univ Namur, Lab Inorgan Mat Chem CMI, 61 Rue Bruxelles, B-5000 Namur, Belgium
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Abstract

The excellent optoelectronic properties of metal halide perovskites (MHPs) have been employed in various photocatalytic applications, but their poor water stability is considered as the main bottleneck for further development. Herein, we protect the light-absorbing CsPbBr3 MHP with a NiOx and TiO2 hole and electron extracting layer. This planar NiOx/CsPbBr3/TiO2 architecture can easily be fabricated through solutionprocessing. When applied to selective photocatalytic oxidation of benzyl alcohol, this system presents a 7-fold enhancement of photoactivity and an improved stability for over 90 h compared to CsPbBr3 counterpart. Interestingly, we find that trace amounts of water improve photoactivity. Through experimental and theoretical analyses, this improvement could be attributed to water-induced structural reorganization of MHP, leading to improved crystal quality and decreased effective masses of charge carriers. This work indicates planar heterojunction helps improve the photoactivity and stability of MHP photocatalyst, and our findings provide insights into the effect of water on MHPs.

Key words

Planar heterojunction/Metal halide perovskites/Solar photocatalyst cell/Stability

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出版年

2022
Applied Catalysis

Applied Catalysis

ISSN：0926-3373
被引量22
参考文献量55
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