Martin Allgöwer, M.D., 1917–2007

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• 作者：Basil A. Pruitt
• 关键词：Cuprous oxide ; Photoelectrolysis ; H₂ evolution ; Water splitting ; p-Type photoelectrode
• 刊名：Burns
• 出版年：2008
• 出版时间：May 2008
• 年：2008
• 卷：34
• 期：3
• 页码：302
• 全文大小：91 K

文摘

Electrochemical deposition of p-type Cu₂O films on transparent conducting glass from a Cu₂SO₄ solution was conducted at different temperatures. The films were examined for H₂ evolution from photoelectrolysis of water under visible light illumination. Using Pt as the counter electrode, photocurrents with corresponding H₂ evolution could be observed for the deposited Cu₂O films in a Na₂SO₄ solution under a cathodic bias. The Cu₂O films obtained at different deposition temperatures were in the cubic phase, but showed different out-of-plane crystalline orientations. An incident monochromatic photon-to-current conversion efficiency of 26 % at 400 nm was achieved for a Cu₂O film with a [1 1 1] out-of-plane orientation, while an efficiency of only 17 % was obtained for a film with a [1 1 0] orientation. The [1 1 1]-oriented film exhibited a higher electronic conductivity, which might have led to a higher charge delocalization rate. By coupling with an n-type WO₃ film to promote charge transport, the photocurrent for the Cu₂O films was significantly improved.