Enhanced Photoelectrochemical Solar Water Splitting Using a Platinum-Decorated CIGS/CdS/ZnO Photocathode

Mukund G. Mali, Hyun Yoon, Bhavana N. Joshi, Hyunwoong Park, Salem S. Al-Deyab, Dong Chan Lim, SeJin Ahn, Carlo Nervi, Suk Goo Yoon

    Research output: Contribution to journalArticlepeer-review

    84 Citations (Scopus)

    Abstract

    A Cu(InGa)Se2 film was modified with CdS/ZnO for application to solar water splitting. Platinum was electrodeposited on the ZnO layer as a hydrogen evolution catalyst. The effects of the electroplating time and acidity level of the electrolyte on the photocurrent density were studied. The highest photocurrent density of -32.5 mA/cm2 under 1.5 AM illumination was achieved with an electroplating time of 30 min at a pH of 9. This photocurrent density is higher than those reported in previous studies. The markedly high performance of the CIGS/CdS/ZnO photocathode was rationalized in terms of its type II cascade structure that facilitated efficient charge separation at the interface junction.

    Original languageEnglish
    Pages (from-to)21619-21625
    Number of pages7
    JournalACS Applied Materials and Interfaces
    Volume7
    Issue number38
    DOIs
    Publication statusPublished - 2015 Sept 30

    Bibliographical note

    Publisher Copyright:
    © 2015 American Chemical Society.

    Keywords

    • CIGS/CdS
    • p-n junction
    • photocurrent
    • platinum
    • water splitting

    ASJC Scopus subject areas

    • General Materials Science

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