Charge transportation at cascade energy structure interfaces of CuInxGa1-xSeyS2-y/CdS/ZnS for spontaneous water splitting

Sang Youn Chae, Se Jin Park, Byoung Koun Min, Yun Jeong Hwang, Oh Shim Joo

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A photoelectrode has to generate high enough photovoltage by efficient charge separation spontaneously to split water. In this study, cascade band structures with CdS and ZnS applied to CuInxGa1-xSeyS2-y (CIGS) photoelectrode of water splitting. The morphology, the electronic and the chemical state of CIGS heterojunction films have been characterized by a scanning electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet photoelectron spectroscopy. The CIGS/CdS/ZnS photocathode shows ∼400 mV anodic shift of onset potential and 0.028% efficiency for solar to hydrogen conversion when it couples with a WO3/BiVO4/Co-Pi photoanode for water splitting without external bias potential.

Original languageEnglish
Pages (from-to)633-640
Number of pages8
JournalElectrochimica Acta
Volume297
DOIs
Publication statusPublished - 2019 Feb 20

Keywords

  • CdS
  • CIGS
  • Photoelectrochemical cell
  • Water splitting
  • ZnS

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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