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

Sang Youn Chae, Se Jin Park, Byong koun Min, Yun Jeong Hwang, Oh Shim Joo

Research output: Contribution to journalArticlepeer-review

10 Citations (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

Bibliographical note

Funding Information:
This study was supported by the program of the Korea Institute of Science and Technology (KIST; No. 2017R1A2A2A05001140), and by the Korea Center for Artificial Photosynthesis (KCAP) funded by the Minister of Science, ICT and Future Planning (MSIP) through the National Research Foundation of Korea (No. 2014M1A2A2070004).

Funding Information:
This study was supported by the program of the Korea Institute of Science and Technology (KIST; No. 2017R1A2A2A05001140 ), and by the Korea Center for Artificial Photosynthesis (KCAP) funded by the Minister of Science, ICT and Future Planning ( MSIP ) through the National Research Foundation of Korea (No. 2014M1A2A2070004 ).

Publisher Copyright:
© 2018 Elsevier Ltd

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

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

ASJC Scopus subject areas

  • General Chemical Engineering
  • Electrochemistry

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