Enhanced Photoelectrochemical Solar Water Splitting Using a Platinum-Decorated CIGS/CdS/ZnO Photocathode

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• 作者：Mukund G. Mali ; Hyun Yoon ; Bhavana N. Joshi ; Hyunwoong Park ; Salem S. Al-Deyab ; Dong Chan Lim ; SeJin Ahn ; Carlo Nervi ; Sam S. Yoon
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 30, 2015
• 年：2015
• 卷：7
• 期：38
• 页码：21619-21625
• 全文大小：387K
• ISSN：1944-8252

文摘

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 鈭?2.5 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.