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Journal of Nanomaterials
Volume 2011, Article ID 269591, 5 pages
http://dx.doi.org/10.1155/2011/269591
Research Article

CdSe Quantum Dots Sensitized Mesoporous TiO2 Solar Cells with CuSCN as Solid-State Electrolyte

State Key Laboratory of Silicon Materials and Department of Materials Science Engineering, Zhejiang University, Hangzhou 310027, China

Received 1 May 2010; Revised 29 June 2010; Accepted 16 August 2010

Academic Editor: Bo Zou

Copyright © 2011 Guanbi Chen 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

Mesoporous TiO2 is functionalized by 3-mercaptopropyl trimethyoxysilane (MPTMS) to anchor CdSe quantum dots (QDs). The resulting TiO2/CdSe is combined with solid-state electrolyte (CuSCN) to form solar cells. It is found that the efficiency of electron injection from QDs to TiO2 can be improved owing to the substitution of the long chains of organic capping agents at the surface of QDs with MPTMS. The hydrolyzate of MPTMS forms an insulating barrier layer to reduce the recombination at the TiO2/CdSe interface, leading to the increase of open-circuit voltage (Voc).