Abstract
A Cu(InGa)Se2 film was modified with CdS/ZnO for application to solar water splitting. Platinum was electrodeposited on the ZnO layer as a hydrogen evolution catalyst. The effects of the electroplating time and acidity level of the electrolyte on the photocurrent density were studied. The highest photocurrent density of -32.5 mA/cm2 under 1.5 AM illumination was achieved with an electroplating time of 30 min at a pH of 9. This photocurrent density is higher than those reported in previous studies. The markedly high performance of the CIGS/CdS/ZnO photocathode was rationalized in terms of its type II cascade structure that facilitated efficient charge separation at the interface junction.
Original language | English |
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Pages (from-to) | 21619-21625 |
Number of pages | 7 |
Journal | ACS Applied Materials and Interfaces |
Volume | 7 |
Issue number | 38 |
DOIs | |
Publication status | Published - 2015 Sept 30 |
Bibliographical note
Publisher Copyright:© 2015 American Chemical Society.
Keywords
- CIGS/CdS
- p-n junction
- photocurrent
- platinum
- water splitting
ASJC Scopus subject areas
- General Materials Science