836
From the graph in Fig. 10 it can be concluded that the
highest absorbance characterized the A sample. An absorption
of 1.541 for a wavelength of 228 nm was achieved. Samples B
and C has almost the same absorption capacity equal to about
1.401 for a wavelength of 226 nm. The lowest absorption has
a sample D equal to 1.223 at a wavelength of the incident
wave equal to 310 nm. It can, therefore, be concluded that the
grain size affects in a significant way the absorption capacity.
The value of absorbance of titanium dioxide was increased
by reducing the grain size. This will have a significant
impact on the ability to a generation of electric charge during
electrochemical processes taking place in the dye-sensitized
solar cells.
Fig. 10. A graph of absorbance of the titanium oxide
depending on the length of the incident wave
In Figure 11 is a graph of the absorption of nano-structured
titanium oxide layer that is coated with an n3dye. it can be
seen that the dye extends the absorption of titanium oxide with
a wavelength of 400-700 nm.
fig. 11. A graph of absorbance of the titanium oxide covered with n3
dye depending on the length of the incident wave
4. conclusions
By the sol-gel method, the nanocrystalline powder
of titanium oxide was prepared that was confirmed by
the research on the transmission electron microscope.
Produced nanopowder has anatase structure that was
confirmed by X-ray and Raman research. Anatase is the
most desirable form of a crystalline structure of titanium
oxide from the point of view of its use in dye-sensitized solar
cells. The particle diameter of the prepared powder does not
exceed a few nanometers and purchased a commercial TiO2
powder particles is in the range from 90 to 400 nm. By this
study, it can be concluded that the grain size substantially
affects on the ability of absorption. By reducing the
grain size, increasing the value of absorbance of titanium
dioxide. This will have a significant impact on the ability to
a generation of electric charge during electrochemical
processes taking place in the dye-sensitized solar cells.
acknowledgment
The works have been implemented within the framework
of the project entitled “Interaction between the nanostructural
coatings with carbon nanoelements and substrate of the
integrated dye-sensitized photovoltaic cells”, funded by
the Polish national science centre in the framework of the
“oPus” competitions. The project was financed by the
national science centre granted by the decision number
Dec-2013/09/b/sT8/02943. This publication was financed
by the Ministry of science and higher education of Poland
as the statutory financial grant of the faculty of Mechanical
engineering suT.
references
[1] J. Domaradzki, A. borkowska, D. kaczmarek, e.L. Prociow,
Opt. Appl.
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