Micrometer-Sized Fluorine Doped Tin Oxide As Fast Electron Collector for Enhanced Dye-Sensitized Solar Cells
Autor: | Fei Gao, Zhao Li, Lu Zhou, Jinghui Zeng, Ye Feng Wang, Xiao Rui Cui |
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Rok vydání: | 2014 |
Předmět: | |
Zdroj: | ACS Applied Materials & Interfaces. 6:16593-16600 |
ISSN: | 1944-8252 1944-8244 |
Popis: | Titanium dioxide (TiO2)-layered fluorine doped tin oxide (FTO) powder was synthesized and applied as the photoanode in dye-sensitized solar cells (DSSCs). FTO powders are connected to form a direct electron pathway for the efficient extract of injected electrons, while the TiO2 layer serves as an energy barrier prohibiting the charge combination with oxidized dye or I3(-). The electrochemical impedance spectroscopy (EIS) analyses suggest that electrons have a longer combination lifetime (τe = 233 ms) than that of the electron in the DSSCs using traditional P25 photoanodes (τe = 28 ms). The DSSCs using 5 μm thick TiO2@FTO as photoanodes eventually give a respectable and long-term stable photovoltaic performance with a current density of 23.8 mA/cm(2), an open circuit voltage of 0.69 V, and power conversion efficiency of 7.4%. The results are received on a low dye loading level (0.25 × 10(-7) mol/cm(2)), which is (1)/10 of that for traditional photoanode (2.79 × 10(-7) mol/cm(2)). |
Databáze: | OpenAIRE |
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