Electrochemical Deposition of ZnO Thin Films and Nanowires for Photovoltaic Applications

被引:36
作者
Sanchez, Sylvia [1 ]
Levy-Clement, Claude [2 ]
Ivanova, Valentina [1 ]
机构
[1] CEA Leti, F-38054 Grenoble, France
[2] CNRS, Inst Chim & Mat Paris Est, F-94320 Thiais, France
关键词
ZINC-OXIDE; SOLAR-CELLS; CATHODIC ELECTRODEPOSITION; NANORODS; CHLORIDE; POLYMER; GROWTH; FIELD; TEMPERATURE; PERFORMANCE;
D O I
10.1149/2.024212jes
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The electrochemical deposition of ZnO thin films (2D layers) and nanowires on glass substrates covered with transparent conductive oxide (TCO) was studied with the purpose to use them in nanostructured solar cells. It was shown that the bath temperature and the electrolyte concentration played an important role on the ZnO layer morphology, composition, crystallization and optical properties. It was found that the thin films deposited from electrolytes with lower potassium chloride (KCl) concentration (0.1 M) and at temperatures higher than 50 degrees C exhibit very good optical and structural properties. The rapid thermal annealing step at 500 degrees C improves the ZnO film properties whereas the conventional annealing did not bring a real improvement. These 2D layers could be used subsequently for the electrodeposition of ZnO nanowires which dimensions could be tailored by the seed layer (2D layer) morphology and thickness. The supporting electrolyte (KCl) concentration and the passed charge density during the electrodeposition process could be additionally used to control their dimensions. Thus grown ZnO nanowires exhibit interesting optical and structural properties and therefore could be further integrated in nanostructured extremely thin absorber (eta) and hybrid (dye sensitized or polymer) solar cells. (C) 2012 The Electrochemical Society. [ DOI: 10.1149/2.024212jes] All rights reserved.
引用
收藏
页码:D705 / D712
页数:8
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