A multijunction of ZnIn2S4 nanosheet/TiO2 film/Si nanowire for significant performance enhancement of water splitting
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- 作者：Qiong Liu ; Fangli Wu ; Fengren Cao ; Lei Chen ; Xinjian Xie ; Weichao Wang…
- 关键词：water splitting ; photoelectrochemical cells ; nanosheets ; atomic layer deposition ; multijunction
- 刊名：Nano Research
- 出版年：2015
- 出版时间：November 2015
- 年：2015
- 卷：8
- 期：11
- 页码：3524-3534
- 全文大小：2,618 KB
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Fangli Wu (1)
Fengren Cao (1)
Lei Chen (2)
Xinjian Xie (2)
Weichao Wang (2)
Wei Tian (1)
Liang Li (1)
1. College of Physics, Optoelectronics and Energy, Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou, 215006, China
2. Department of Electronics, Tianjin Key Laboratory of Photo-Electronic Thin Film Device and Technology, Nankai University, Tianjin, 370001, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chinese Library of Science
Chemistry
Nanotechnology - 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
- ISSN：1998-0000
文摘
Photoelectrodes with a specific structure and composition have been proposed for improving the efficiency of solar water splitting. Here, a novel multijunction structure was fabricated, with Si nanowires as cores, ZnIn2S4 nanosheets as branches, and TiO2 films as sandwiched layers. This junction exhibited a superior photoelectrochemical performance with a maximum photoconversion efficiency of 0.51%, which is 795 and 64 times higher than that of a bare Si wafer and nanowires, respectively. The large enhancement was attributed to the effective electron–hole separation and fast excited carrier transport within the multijunctions resulting from their favorable energy band alignments with water redox potentials, and to the enlarged contact area for facilitating the electron transfer at the multijunction/electrolyte interface.