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Issue 18, 2018
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Photogenerated-carrier separation along edge dislocation of WO3 single-crystal nanoflower photoanode

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Abstract

Point defects, such as oxygen vacancies in semiconductors, have been widely proven to influence the separation and transfer processes of the photogenerated hot charges. Besides point defects, to date, scarcely any study has focused on expounding the functions of line defects (such as dislocations) in the crystal of semiconductor photoanodes and influencing the photogenerated hot charge separation process. Herein, a nanoflower (NF)-like WO3 single-crystal thin film photoanode with edge dislocations is reported. The dislocation induces mismatch of the (002) and (020) facets. Further photoelectrochemical (PEC) performance and DOS calculation results indicate that a heterojunction system could be formed along the edge dislocations due to the energy difference between the mismatched (002) and (020) facets. Therefore, this present study provides an understanding of the line defect in the photogenerated hot carrier separation process and a novel method to improve the properties of photoelectrodes and photocatalytic materials in the near future.

Graphical abstract: Photogenerated-carrier separation along edge dislocation of WO3 single-crystal nanoflower photoanode

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Publication details

The article was received on 24 Jan 2018, accepted on 14 Apr 2018 and first published on 16 Apr 2018


Article type: Paper
DOI: 10.1039/C8TA00796A
Citation: J. Mater. Chem. A, 2018,6, 8604-8611
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    Photogenerated-carrier separation along edge dislocation of WO3 single-crystal nanoflower photoanode

    Y. Bu, J. Ren, H. Zhang, D. Yang, Z. Chen and J. Ao, J. Mater. Chem. A, 2018, 6, 8604
    DOI: 10.1039/C8TA00796A

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