Charge Transportation at Cascade Energy Structure Interfaces of CuInxGa1-xSeyS2-y/CdS/ZnS for Spontaneous Water Splitting

Title
Charge Transportation at Cascade Energy Structure Interfaces of CuInxGa1-xSeyS2-y/CdS/ZnS for Spontaneous Water Splitting
Authors
주오심민병권황윤정채상윤박세진
Keywords
photoelectrochemical cell; CIGS; CdS; ZnS; Water splitting
Issue Date
2019-02
Publisher
Electrochimica acta
Citation
VOL 297-640
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.
URI
http://pubs.kist.re.kr/handle/201004/69012
ISSN
0013-4686
Appears in Collections:
KIST Publication > Article
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