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

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

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

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 solution-processing. 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.

langue originaleAnglais
Numéro d'article120760
journalApplied Catalysis. B: Environmental
Volume301
Les DOIs
Etat de la publicationPublié - févr. 2022

Financement

The authors acknowledge financial support from the Research Foundation – Flanders (FWO grant nos. G.0B39.15 , G.0B49.15 , G098319N , 12Y7221N , 12Y6418N and ZW15_09-GOH6316N ), the KU Leuven Research Fund ( C14/19/079 , iBOF-21-085 PERSIST ), KU Leuven Industrial Research Fund ( C3/19/046 ), the Flemish government through long term structural funding Methusalem ( CASAS2 , Meth/15/04 ), and MPI financial support to J.H. as an MPI fellow. C.W. acknowledges the financial support from the China Scholarship Council.

Bailleurs de fondsNuméro du bailleur de fonds
KU Leuven Industrial Research FundC3/19/046
Research Foundation – Flanders
Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)12Y6418N, 12Y7221N, G098319N
Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)
KU LeuvenC14/19/079
KU Leuven
China Scholarship Council
Vlaamse regeringMeth/15/04
Vlaamse regering

    Empreinte digitale

    Examiner les sujets de recherche de « Planar heterojunction boosts solar-driven photocatalytic performance and stability of halide perovskite solar photocatalyst cell ». Ensemble, ils forment une empreinte digitale unique.

    Contient cette citation