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 Mechanical Engineering

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

5 Citations (Scopus)

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
Publication status	Published - 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V.

Keywords

CIGS/CdS
Photocurrent
Platinum
Water splitting
p-n junction

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

UN SDGs

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

Access to Document

10.1016/j.jallcom.2016.08.313

Cite this

@article{ca8321c196df4399bc1b157e5c53207b,

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, Photocurrent, Platinum, Water splitting, p-n junction",

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.",

}

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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 - Photocurrent

KW - Platinum

KW - Water splitting

KW - p-n junction

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