Abdubannaevich

Working principle of DSSC Solar cell: In a solar cell, electricity generation of charge carriers, which is the basis of current generation and separation of generated charge carriers
is considered DSSC-based solar cells from classical pn junction solar cells There are two main differences in the working principle of the elements: charge carriers generated in a solid-state classical pn junction pn
field of space charges produced during transition, i.e. production in this field separated by an electric field. DSSC based solar
surrounded by a layer of paint as a working electrode (anode) in its elements,
Optionally one of titanium oxide (TiO2) with a thickness of 5-15 ÿm a structural set connected to one serves. This electrode current
connected with conductive glass (transparent conductive TCO oxide).
will be The process of releasing electrons as a counter electrode (cathode). various conductors that are small (e.g. platinum (Pt), gold (Au), palladium (Pa)) can be used. These electrodes are oxidizing-reducing
iodide/triiodide (3I - /I -3 ) is filled with an electrolyte. This layer
serves as a hollow conductor.
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ÿ, ÿ

-1,0
-0,5

0
0,5

1,0
Figure 2. Working principle of TiO2 based DSSC solar cell. EC1 and EV1 are the limits of the conduction and valence band of TiO2 , EC2 and EV2 are the limits of the conduction and valence band of the dye, EF is Fermi

level.
However, as a porous conductor, solid and ionic electrolytes as well

can be used In general, DSSC-based solar cells

light into electrical energy by means of chemical conversions

turns This change can be explained as follows (Fig. 2).

First, the electron from the valence band of the dye under the influence of light

passes into the conduction zone. The potential of the permeability zone of the paint

Because it is greater than the potential of the conduction band of TiO2

towards the conduction band of TiO2 under the influence of this potential difference

makes a jumpy move. Then the electron from TiO2 structure to TCO

passes This transition is localized in inorganic and amorphous semiconductors

it can be compared to the jump conductance. Electron sun

in order to maintain electroneutrality when leaving the element

comes from the opposite electrode. Do not look for covacs in electrolyte solution transferred to the opposite electrode. As a result, oxidation-regeneration

potential kamayadis. Oxidizing - ticking iodide/triiodide

the potential of oxidized paint is restored and the above event is repeated.

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Figure 3 shows the power band diagram of a DSSC solar cell
is quoted. Above, we emphasized that the electron states in the paint density distribution is similar to that of amorphous semiconductors,
that is, it can be assumed that the value of the density of electronic states is around 1017-1018 eV-1 cm-3 even in the forbidden zone of the dye. Therefore it is from 105

the value of the light absorption coefficient in the material
will be big. This increases the current output from the solar cell allows to get in values. Output from DSSC solar cell
The maximum voltage value of TiO2 conduction band and Fermi is determined by the difference in level.
cm-1

Figure 3. Zone diagram of a DSSC solar cell. Look at the text.