A kind of counter electrode of dye-sensitized solar cell and its preparation method and application

Abstract

The invention provides a preparation method of a dye-sensitized solar cell (DSSC) counter-electrode, the DSSC counter-electrode prepared through the method and application of the counter-electrode in the DSSC. The preparation method of the DSSC counter-electrode includes coating a solution containing thiophene monomer as shown in (1) on a conductive substrate and removing solvent, obtaining a primary membrane, carrying out heat treatment to the primary membrane, enabling the thiophene monomer to be polymerized, and obtaining the DSSC counter-electrode containing the conductive substrate and a polymer layer on the conductive substrate. R is bromine (Br) or iodine (I). The DSSC counter-electrode prepared through the method has catalytic performance the same as a platinum counter-electrode.

Description

technical field

[0001] The invention relates to a method for preparing a counter electrode of a dye-sensitized solar cell, a counter electrode of a dye-sensitized solar cell prepared by the method, and an application of the counter electrode in a dye-sensitized solar cell. Background technique

[0002] With the sustainable development of social economy, the energy crisis and the increasing environmental pollution have become serious problems faced by human beings all over the world. Solar energy is inexhaustible and inexhaustible. From the perspective of long-term energy and environmental friendliness, comprehensive utilization of solar energy is one of the safest, most environmentally friendly and long-term methods. Compared with silicon solar cells, dye-sensitized solar cells (Dye-sensitized Solar Cells) have the advantages of low cost, good stability and simple preparation, and have good application prospects.

[0003] Dye-sensitized solar cells are mainly composed of se...

Examples

preparation example Construction

[0014] The preparation method of the solar cell counter electrode provided by the present invention includes coating a solution containing a thiophene monomer with the structure shown in formula (1) on a conductive substrate and removing the solvent to obtain a primary film, and then heat-treating the primary film , so that the thiophene monomer is polymerized to obtain a solar cell counter electrode comprising a conductive substrate and a polymer layer attached to the conductive substrate;

[0015] Formula 1),

[0016] Wherein, R is Br or I.

[0017] According to the present invention, the R is particularly preferably Br. At this time, the thiophene monomer is 2,5-dibromo-3,4-ethylenedioxythiophene monomer, so that the obtained counter electrode can be used in dye-sensitized solar energy Achieve higher photoelectric conversion efficiency in the battery.

[0018] In the present invention, the concentration of the solution containing thiophene monomer is not particularly li...

Embodiment 1

[0030] This example is used to illustrate the counter electrode of the dye-sensitized solar cell provided by the present invention and its preparation method and application.

[0031] (1) Preparation of thiophene monomer:

[0032] Thiophene monomer was synthesized according to the method of literature Chem.Mater.1996,8,882-889. The specific steps are as follows: First, dissolve 3 g (0.021 mol) of 3,4-ethylenedioxythiophene and 8 g (0.045 mol) of N-bromosuccinimide in a mixed solution of 100 ml of chloroform and glacial acetic acid medium (volume ratio 1:1), and stirred and refluxed at room temperature (25°C) for 3 hours under the protection of an inert gas. Then 100 ml of deionized water was added to the solution and the organic phase solution was separated therein. Sodium bicarbonate solution was added to the organic phase solution until no more bubbles were generated, and the organic phase solution was separated again. The organic phase solution was passed through a chrom...

Embodiment 2

[0036] This example is used to illustrate the counter electrode of the dye-sensitized solar cell provided by the present invention and its preparation method and application.

[0037] (1) Preparation of thiophene monomer:

[0038] Same as Example 1.

[0039] (2) Preparation of counter electrode for dye-sensitized solar cells:

[0040] Dissolve the 2,5-dibromo-3,4-ethylenedioxythiophene monomer obtained in step (1) in chloroform to prepare a solution with a concentration of 0.2 g / mL, and spin-coat 350 μL of the solution on an area of 12cm 2 On the FTO conductive glass, after the chloroform volatilizes, the 2,5-dibromo-3,4-ethylenedioxythiophene monomer forms a uniform white primary film on the FTO conductive glass. Then the above-mentioned primary film was heat-treated at 35°C for 24 hours. After heat treatment, the white primary film turned black, indicating that the solid-state polymerization of 2,5-dibromo-3,4-ethylenedioxythiophene monomer had occurred to obtain Counter...

technical field

[0001] The invention relates to a method for preparing a counter electrode of a dye-sensitized solar cell, a counter electrode of a dye-sensitized solar cell prepared by the method, and an application of the counter electrode in a dye-sensitized solar cell. Background technique

[0002] With the sustainable development of social economy, the energy crisis and the increasing environmental pollution have become serious problems faced by human beings all over the world. Solar energy is inexhaustible and inexhaustible. From the perspective of long-term energy and environmental friendliness, comprehensive utilization of solar energy is one of the safest, most environmentally friendly and long-term methods. Compared with silicon solar cells, dye-sensitized solar cells (Dye-sensitized Solar Cells) have the advantages of low cost, good stability and simple preparation, and have good application prospects.

[0003] Dye-sensitized solar cells are mainly composed of se...

Examples

preparation example Construction

[0014] The preparation method of the solar cell counter electrode provided by the present invention includes coating a solution containing a thiophene monomer with the structure shown in formula (1) on a conductive substrate and removing the solvent to obtain a primary film, and then heat-treating the primary film , so that the thiophene monomer is polymerized to obtain a solar cell counter electrode comprising a conductive substrate and a polymer layer attached to the conductive substrate;

[0015] Formula 1),

[0016] Wherein, R is Br or I.

[0017] According to the present invention, the R is particularly preferably Br. At this time, the thiophene monomer is 2,5-dibromo-3,4-ethylenedioxythiophene monomer, so that the obtained counter electrode can be used in dye-sensitized solar energy Achieve higher photoelectric conversion efficiency in the battery.

[0018] In the present invention, the concentration of the solution containing thiophene monomer is not particularly li...

Embodiment 1

[0030] This example is used to illustrate the counter electrode of the dye-sensitized solar cell provided by the present invention and its preparation method and application.

[0031] (1) Preparation of thiophene monomer:

[0032] Thiophene monomer was synthesized according to the method of literature Chem.Mater.1996,8,882-889. The specific steps are as follows: First, dissolve 3 g (0.021 mol) of 3,4-ethylenedioxythiophene and 8 g (0.045 mol) of N-bromosuccinimide in a mixed solution of 100 ml of chloroform and glacial acetic acid medium (volume ratio 1:1), and stirred and refluxed at room temperature (25°C) for 3 hours under the protection of an inert gas. Then 100 ml of deionized water was added to the solution and the organic phase solution was separated therein. Sodium bicarbonate solution was added to the organic phase solution until no more bubbles were generated, and the organic phase solution was separated again. The organic phase solution was passed through a chrom...

Embodiment 2

[0036] This example is used to illustrate the counter electrode of the dye-sensitized solar cell provided by the present invention and its preparation method and application.

[0037] (1) Preparation of thiophene monomer:

[0038] Same as Example 1.

[0039] (2) Preparation of counter electrode for dye-sensitized solar cells:

[0040] Dissolve the 2,5-dibromo-3,4-ethylenedioxythiophene monomer obtained in step (1) in chloroform to prepare a solution with a concentration of 0.2 g / mL, and spin-coat 350 μL of the solution on an area of 12cm 2 On the FTO conductive glass, after the chloroform volatilizes, the 2,5-dibromo-3,4-ethylenedioxythiophene monomer forms a uniform white primary film on the FTO conductive glass. Then the above-mentioned primary film was heat-treated at 35°C for 24 hours. After heat treatment, the white primary film turned black, indicating that the solid-state polymerization of 2,5-dibromo-3,4-ethylenedioxythiophene monomer had occurred to obtain Counter...

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