期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 16, 期 9, 页码 2993-3001出版社
SPRINGER
DOI: 10.1007/s10008-012-1729-0
关键词
Titanium dioxide; Anatase; Dye-sensitized solar cell
资金
- Academy of Sciences of the Czech Republic [IAA 400400804, KAN 200100801]
- Grant Agency of the Czech Republic [P108/12/0814]
- EC 7th FP project SANS [NMP-246124]
- National Research Foundation of Singapore [R279-000-276-272]
- European Research Council (ERC) under the ERC-2009-AdG [247404 MESOLIGHT]
A nanocrystalline TiO2 (anatase) nanosheet exposing mainly the (001) crystal faces was tested as photoanode material in dye-sensitized solar cells. The nanosheets were prepared by hydrothermal growth in HF medium. Good-quality thin films were deposited on F-doped SnO2 support from the TiO2 suspension in ethanolic or aqueous media. The anatase (001) face adsorbs a smaller amount of the used dye sensitizer (C101) per unit area than the (101) face which was tested as a reference. The corresponding solar cell with sensitized (001)-nanosheet photoanode exhibits a larger open-circuit voltage than the reference cell with (101)-terminated anatase nanocrystals. The voltage enhancement is attributed to the negative shift of flatband potential for the (001) face. This conclusion rationalizes earlier works on similar systems, and it indicates that careful control of experimental conditions is needed to extract the effect of band energetic on the current/voltage characteristics of dye-sensitized solar cell.
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