Platinum-decorated Cu(InGa)Se2/CdS photocathodes: Optimization of Pt electrodeposition time and pH level

Min woo Kim; Hyun Yoon; Tae Yoon Ohm; Mukund G. Mali; Sung Kyu Choi; Hyunwoong Park; Salem S. Al-Deyab; Dong Chan Lim; Se Jin Ahn; Sam S. Yoon

doi:10.1016/j.jallcom.2016.08.313

Platinum-decorated Cu(InGa)Se₂/CdS photocathodes: Optimization of Pt electrodeposition time and pH level

Min woo Kim, Hyun Yoon, Tae Yoon Ohm, Mukund G. Mali, Sung Kyu Choi, Hyunwoong Park, Salem S. Al-Deyab, Dong Chan Lim, Se Jin Ahn, Sam S. Yoon

School of Energy Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Photoelectrochemical (PEC) water splitting was performed using co-evaporated Cu(In,Ga)Se₂(CIGS, p-type) films as the photocathode. Pt was electrodeposited on CIGS and CIGS/CdS films. The effect of the electrodeposition time was investigated to determine the optimal deposition conditions. The CIGS film was covered with a 60-nm-thick CdS layer (n-type) using a chemical-bath deposition technique, which created a p-n junction. The effect of the Pt electroplating time was again investigated for the CIGS/CdS films; thus, the effect of CdS addition could be quantitatively investigated. The effect of the pH of 0.5 M Na₂SO₄electrolyte was also investigated. The optimal water-splitting performance occurred at −24.16 mA/cm²at −0.7 V vs. Ag/AgCl with a Pt electrodeposition time of 20 min and pH 9. The CIGS/CdS films were characterized by X-ray diffraction, scanning electron microscopy, and focused-ion beam transmission electron microscopy.

Original language	English
Pages (from-to)	294-300
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	692
DOIs	https://doi.org/10.1016/j.jallcom.2016.08.313
State	Published - 2017

Keywords

CIGS/CdS
p-n junction
Photocurrent
Platinum
Water splitting

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jallcom.2016.08.313

Cite this

@article{96e06764b4db42de8deb6e39df27bb1b,

title = "Platinum-decorated Cu(InGa)Se2/CdS photocathodes: Optimization of Pt electrodeposition time and pH level",

abstract = "Photoelectrochemical (PEC) water splitting was performed using co-evaporated Cu(In,Ga)Se2(CIGS, p-type) films as the photocathode. Pt was electrodeposited on CIGS and CIGS/CdS films. The effect of the electrodeposition time was investigated to determine the optimal deposition conditions. The CIGS film was covered with a 60-nm-thick CdS layer (n-type) using a chemical-bath deposition technique, which created a p-n junction. The effect of the Pt electroplating time was again investigated for the CIGS/CdS films; thus, the effect of CdS addition could be quantitatively investigated. The effect of the pH of 0.5 M Na2SO4electrolyte was also investigated. The optimal water-splitting performance occurred at −24.16 mA/cm2at −0.7 V vs. Ag/AgCl with a Pt electrodeposition time of 20 min and pH 9. The CIGS/CdS films were characterized by X-ray diffraction, scanning electron microscopy, and focused-ion beam transmission electron microscopy.",

keywords = "CIGS/CdS, p-n junction, Photocurrent, Platinum, Water splitting",

author = "Kim, {Min woo} and Hyun Yoon and Ohm, {Tae Yoon} and Mali, {Mukund G.} and Choi, {Sung Kyu} and Hyunwoong Park and Al-Deyab, {Salem S.} and Lim, {Dong Chan} and Ahn, {Se Jin} and Yoon, {Sam S.}",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2017",

doi = "10.1016/j.jallcom.2016.08.313",

language = "English",

volume = "692",

pages = "294--300",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Platinum-decorated Cu(InGa)Se2/CdS photocathodes

T2 - Optimization of Pt electrodeposition time and pH level

AU - Kim, Min woo

AU - Yoon, Hyun

AU - Ohm, Tae Yoon

AU - Mali, Mukund G.

AU - Choi, Sung Kyu

AU - Park, Hyunwoong

AU - Al-Deyab, Salem S.

AU - Lim, Dong Chan

AU - Ahn, Se Jin

AU - Yoon, Sam S.

PY - 2017

Y1 - 2017

N2 - Photoelectrochemical (PEC) water splitting was performed using co-evaporated Cu(In,Ga)Se2(CIGS, p-type) films as the photocathode. Pt was electrodeposited on CIGS and CIGS/CdS films. The effect of the electrodeposition time was investigated to determine the optimal deposition conditions. The CIGS film was covered with a 60-nm-thick CdS layer (n-type) using a chemical-bath deposition technique, which created a p-n junction. The effect of the Pt electroplating time was again investigated for the CIGS/CdS films; thus, the effect of CdS addition could be quantitatively investigated. The effect of the pH of 0.5 M Na2SO4electrolyte was also investigated. The optimal water-splitting performance occurred at −24.16 mA/cm2at −0.7 V vs. Ag/AgCl with a Pt electrodeposition time of 20 min and pH 9. The CIGS/CdS films were characterized by X-ray diffraction, scanning electron microscopy, and focused-ion beam transmission electron microscopy.

AB - Photoelectrochemical (PEC) water splitting was performed using co-evaporated Cu(In,Ga)Se2(CIGS, p-type) films as the photocathode. Pt was electrodeposited on CIGS and CIGS/CdS films. The effect of the electrodeposition time was investigated to determine the optimal deposition conditions. The CIGS film was covered with a 60-nm-thick CdS layer (n-type) using a chemical-bath deposition technique, which created a p-n junction. The effect of the Pt electroplating time was again investigated for the CIGS/CdS films; thus, the effect of CdS addition could be quantitatively investigated. The effect of the pH of 0.5 M Na2SO4electrolyte was also investigated. The optimal water-splitting performance occurred at −24.16 mA/cm2at −0.7 V vs. Ag/AgCl with a Pt electrodeposition time of 20 min and pH 9. The CIGS/CdS films were characterized by X-ray diffraction, scanning electron microscopy, and focused-ion beam transmission electron microscopy.

KW - CIGS/CdS

KW - p-n junction

KW - Photocurrent

KW - Platinum

KW - Water splitting

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