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Platinum-decorated Cu(InGa)Se-2/CdS photocathodes: Optimization of Pt electrodeposition time and pH level
- Authors
- Kim, Min-woo; Yoon, Hyun; Ohm, Tae Yoon; Mali, Mukund G.; Choi, Sung Kyu; Park, Hyunwoong; Al-Deyab, Salem S.; Lim, Dong Chan; Ahn, SeJin; Yoon, Sam S.
- Issue Date
- 25-1월-2017
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- CIGS/CdS; Photocurrent; Platinum; p-n junction; Water splitting
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.692, pp.294 - 300
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 692
- Start Page
- 294
- End Page
- 300
- ISSN
- 0925-8388
- Abstract
- Photoelectrochemical (PEC) water splitting was performed using co-evaporated Cu(In, Ga) Se-2 (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 Na2SO4 electrolyte was also investigated. The optimal water-splitting performance occurred at -24.16 mA/cm(2) at -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. (C) 2016 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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