Journal
ELECTROCHIMICA ACTA
Volume 54, Issue 28, Pages 7350-7356Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.07.065
Keywords
Dye-sensitized solar cells; TiO2-B; Nanobelt; Composite; Interfacial electron transfer
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Funding
- Key Program Projects of the National Natural Science Foundation of China [20431030]
- National Natural Science Foundation of China [20671032]
- Key Program Projects of the Province Natural Science Foundation of Heilongjiang Province [ZJG0602-01]
- Scientific Research Fund of Heilongjiang Provincial Education Department [11521207]
- Doctorial Scientific Research Fund of Heilongjiang University
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In order to possess the merits of both building blocks, i.e. the rapid interfacial electron transport of TiO2-B narrow nanobelts (NBs) and the high surface area of TiO2 nanoparticles (NPs), the TiO2-B NBs and TiO2 NPs composites photoelectrodes were prepared with different weight ratios. The dye-sensitized solar cell prototypes were fabricated based on the composite photoelectrodes and the photoelectrical properties have been systematically studied. Although the amount of adsorption dye of composite solar cells decreased, the composite cells could obtain higher power conversion efficiency compared to pure TiO2 NP solar cell by rational tuning the weight ratio of TiO2-B NBs and TiO2 NPs, which was due to the faster electron transfer rate. The dye adsorption amount and interfacial electron transport, which together determined the overall photoelectrical conversion efficiency. were investigated by the UV-vis spectra, the electrochemical impedance spectra (EIS), intensity-modulated photocurrent spectroscopy (IMPS) and intensity-modulated photovoltage spectroscopy (IMVS). Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.
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