Open Access Nano Express

ZnO nanosheet arrays constructed on weaved titanium wire for CdS-sensitized solar cells

Cuncun Wu1, Lin Wei2, Yitan Li1, Chang Liu1, Jun Jiao3, Yanxue Chen1* and Liangmo Mei1

Author Affiliations

1 School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China

2 School of Information Science and Engineering, Shandong University, Jinan 250100, People's Republic of China

3 Department of Mechanical and Materials Engineering, Portland State University, P.O. Box 751, Portland, OR 97207-0751, USA

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Nanoscale Research Letters 2014, 9:112  doi:10.1186/1556-276X-9-112

Published: 11 March 2014

Abstract

Ordered ZnO nanosheet arrays were grown on weaved titanium wires by a low-temperature hydrothermal method. CdS nanoparticles were deposited onto the ZnO nanosheet arrays using the successive ionic layer adsorption and reaction method to make a photoanode. Nanoparticle-sensitized solar cells were assembled using these CdS/ZnO nanostructured photoanodes, and their photovoltaic performance was studied systematically. The best light-to-electricity conversion efficiency was obtained to be 2.17% under 100 mW/cm2 illumination, and a remarkable short-circuit photocurrent density of approximately 20.1 mA/cm2 was recorded, which could attribute to the relatively direct pathways for transportation of electrons provided by ZnO nanosheet arrays as well as the direct contact between ZnO and weaved titanium wires. These results indicate that CdS/ZnO nanostructures on weaved titanium wires would open a novel possibility for applications of low-cost solar cells.

Keywords:
ZnO nanosheets; CdS; Nanoparticles; Solar cells