期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 15, 期 35, 页码 14729-14735出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51705e
关键词
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资金
- Ministry of Science and Technology of China [2010DFA64680]
- National Research Fund for Fundamental Key Projects [973 (2011CB933200)]
- National Natural Science Foundation of China [21203039]
- Hundred-Talent Program of the Chinese Academy of Sciences
- EPSRC [EP/J500136/1]
- Engineering and Physical Sciences Research Council [EP/J500136/1] Funding Source: researchfish
TiO2 compact layers (CLs) prepared by electrophoretic deposition (EPD) from an aqueous nanoparticle suspension were used in dye-sensitized solar cells (DSSCs) to prevent charge recombination at the interface between the transparent fluorine-doped tin oxide (FTO) substrate and the electrolyte. The TiO2 nanopowder (ca. 4.5 nm diameter) suspension used in the EPD process was prepared via a continuous hydrothermal flow synthesis pilot plant (at a production rate of ca. 0.38 kg h(-1)). The optimal thickness of the TiO2 CL for DSSCs is about 115 nm. Compared to the DSSCs without a CL, the optimal cell has shown improved short-circuit current density (J(SC)) and solar energy conversion efficiency by 13.1% and 15.0%, respectively. The mechanism for improved performance has been studied by the measurements of dark current and electrochemical impedance spectra. The interfacial charge transfer resistance at the FTO/electrolyte interface is increased after fabricating a CL in the cell, indicating inhibited electron recombination at the interface.
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