ZnO Nanosheets Decorated with CdSe and TiO2 for the Architecture of Dye-Sensitized Solar Cells
Authors: Kim, Young Tae; Park, Mi Yeong; Choi, Kang Ho; Tai, Wei Sheng; Shim, Won Hyun; Park, Sun-Young; Kang, Jae-Wook; Lee, Kyu Hwan; Jeong, Yongsoo; Kim, Young Dok; Lim, Dong Chan
Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 3, March 2011 , pp. 2263-2268(6)
Publisher: American Scientific Publishers
Abstract:Pure and TiO2- and CdSe-deposited ZnO nanosheets aligned vertically to the surface of ITO (Indium tin oxide) are prepared using electrodeposition, which is used for building blocks of dye sensitized solar cell. A significant improvement in the photovoltaic efficiency can be obtained by depositing TiO2 or CdSe on ZnO. Photoluminescence spectra show that the TiO2 and CdSe nanostructures suppress the recombination of the electron–hole pair of ZnO. We suggest that the interface charge transfer at TiO2–ZnO and CdSe–ZnO should be responsible for the suppression of the electron–hole pair recombination and enhanced solar cell efficiency by TiO2 and CdSe nanostructures.
Document Type: Research Article
Publication date: March 1, 2011
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