A ZnO/ZnO:Cr isostructural nanojunction electrode for photoelectrochemical water splitting

详细信息    查看全文

• 作者：Shaohua Shen ; Coleman X. Kronawitter ; Jiangang Jiang ; Penghui Guo ; Liejin Guo ; Samuel S. Mao
• 关键词：ZnO nanorods ; Water splitting ; Photoanodes ; Nanojunction ; Cr doping
• 刊名：Nano Energy
• 出版年：September, 2013
• 年：2013
• 卷：2
• 期：5
• 页码：958-965
• 全文大小：2016 K

文摘

The fabrication and photoelectrochemical characterization of a ZnO/ZnO:Cr isostructural nanojunction electrode is presented. When compared to its constituent components the isostructural nanojunction showed superior performance for water splitting under simulated solar light and visible light (位>510 nm) illumination. In the engineered structure, the presence of intra-bandgap states associated with Cr impurities increases optical absorption, and the nanorod morphology provides a direct pathway for transport of photo-excited electrons to the back contact. The overall photoelectrochemical performance of the ZnO/ZnO:Cr engineered structure is relatively low, however the concept may prove to be applicable to more optimized structures or material systems.