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 › peer-review

3 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 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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title = "Charge transportation at cascade energy structure interfaces of CuInxGa1-xSeyS2-y/CdS/ZnS for spontaneous water splitting",

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",

author = "Chae, {Sang Youn} and Park, {Se Jin} and Min, {Byoung Koun} and Hwang, {Yun Jeong} and Joo, {Oh Shim}",

year = "2019",

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T1 - Charge transportation at cascade energy structure interfaces of CuInxGa1-xSeyS2-y/CdS/ZnS for spontaneous water splitting

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

N2 - 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.

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.

KW - CdS

KW - CIGS

KW - Photoelectrochemical cell

KW - Water splitting

KW - ZnS

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