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

doi:10.1016/j.electacta.2018.11.184

Charge transportation at cascade energy structure interfaces of CuIn_xGa_1-xSe_yS_2-y/CdS/ZnS for spontaneous water splitting

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

GREEN SCHOOL (Graduate School of Energy and Environment)

Research output: Contribution to journal › Article

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 CuIn_xGa_1-xSe_yS_2-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-P_i photoanode for water splitting without external bias potential.

Original language	English
Pages (from-to)	633-640
Number of pages	8
Journal	Electrochimica Acta
Volume	297
DOIs	https://doi.org/10.1016/j.electacta.2018.11.184
Publication status	Published - 2019 Feb 20

Keywords

CdS
CIGS
Photoelectrochemical cell
Water splitting
ZnS

ASJC Scopus subject areas

Chemical Engineering(all)
Electrochemistry

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10.1016/j.electacta.2018.11.184

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Chae, S. Y., Park, S. J., Min, B. K., Hwang, Y. J., & Joo, O. S. (2019). Charge transportation at cascade energy structure interfaces of CuIn_xGa_1-xSe_yS_2-y/CdS/ZnS for spontaneous water splitting. Electrochimica Acta, 297, 633-640. https://doi.org/10.1016/j.electacta.2018.11.184

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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.",

keywords = "CdS, CIGS, Photoelectrochemical cell, Water splitting, ZnS",

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AU - Chae, Sang Youn

AU - Park, Se Jin

AU - Min, Byoung Koun

AU - Hwang, Yun Jeong

AU - Joo, Oh Shim

PY - 2019/2/20

Y1 - 2019/2/20

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AB - 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.

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KW - Photoelectrochemical cell

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KW - ZnS

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