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Journal of Nanomaterials
Volume 2012 (2012), Article ID 858693, 5 pages
http://dx.doi.org/10.1155/2012/858693
Research Article

High-Efficiency CdS Quantum-Dots-Sensitized Solar Cells with Compressed Nanocrystalline TiO2 Photoelectrodes

Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China

Received 26 November 2011; Revised 1 May 2012; Accepted 1 May 2012

Academic Editor: Mauro Coelho dos Santos

Copyright © 2012 Yanan Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Nanocrystalline TiO2 films were fabricated on titanium substrates by compression method. The CdS quantum dots (QDs) were assembled onto the compressed TiO2 layers, which serve as sensitizers. A maximum power conversion efficiency of 4.49% is achieved under 100 mW/cm2 illumination. In this paper, we find that the compression can help increase the efficiency of the cell by increasing the absorption of the CdS QDs and improving the transportation of photogenerated electrons.