Photo anode modifying method for improving stability of dye-sensitized solar cells

A technology of solar cells and dye sensitization, which is applied in the field of solar cells, can solve problems such as damaging photoelectric performance, and achieve the effects of improving stability, low cost, and increasing reaction rate

Active Publication Date: 2015-12-16
SHANGQIU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of method involves a complex dye synthesis process, and changing the chemical structure of the dye molecule may damage its photoelectric properties, such as photoelectron injection efficiency, light absorption capacity, etc.

Method used

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  • Photo anode modifying method for improving stability of dye-sensitized solar cells
  • Photo anode modifying method for improving stability of dye-sensitized solar cells
  • Photo anode modifying method for improving stability of dye-sensitized solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Preparation of one-dimensional structure titania nanowires by hydrothermal preparation

[0026] A 10mm×20mm fluorine-doped tin oxide conductive glass (FTO) substrate was ultrasonically washed with acetone, 2-isopropanol, ethanol, and secondary water for 15 minutes, respectively. Place the cleaned FTO conductive glass sheet against its side in a 25mL reaction kettle, and add the precursor solution (10mL toluene, 1mL concentrated hydrochloric acid, 1mL n-butyl titanate). at 180 o C under the condition of reaction 10h. After the reactor was naturally cooled, the FTO substrate was taken out, rinsed with ethanol and placed in a muffle furnace at 450 o Calcined at C for 0.5h to obtain the titania nanowire array structure ( figure 1 ), with a diameter of 40nm and a length of 4μm.

Embodiment 2

[0027] Example 2: Silanization Treatment of Titanium Dioxide Nanowire Array Surface

[0028] Soak the titanium dioxide nanowire array synthesized above in an ethanol solution containing a ruthenium bipyridine complex dye for 24 hours to make it adsorb dye molecules. The silanization treatment was carried out in a closed container equipped with a gas inlet and outlet valve. The titanium oxide nanowire array after the dye adsorption was placed in the reactor, and nitrogen gas was passed in for 30 minutes, the relative humidity was controlled at 12%, and 0.5 mL of trichloro Methylsilane. The reaction time was controlled at 0, 5, 10, 20, 30, 40, 50 min, respectively. After silanization, rinse the titanium dioxide surface with pyridine (5%) in acetonitrile, 150 o C for 10 min to obtain a silanized photoanode.

[0029] The photoanodes after silanization treatment at different times were assembled into cells for photovoltaic performance testing. The counter electrode of the bat...

Embodiment 3

[0032] Example 3: Stability test of silanized photoanodes

[0033] The modified photoanode obtained above was placed in the air for 0, 5, 10, 15, 20, 25, and 30 days, respectively, and then the operability was measured. See Example 2 for the test method. And the titanium dioxide nanowire array electrode with dye molecules attached without silanization treatment was compared, and the results Such as Figure 4 shown. Through comparison, it is confirmed that the modified photoanode obtained in the present invention can still maintain its original photoelectric performance after 30 days, and has good stability.

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Abstract

The invention belongs to the field of solar cells, and discloses a photo anode modifying method for improving stability of dye-sensitized solar cells. The method takes one-dimensional structured titanium dioxide nano-wire array synthesized by a hydrothermal method as a loading material; after dye absorption, the titanium dioxide surface is subjected to silanization treatment; and a uniform silanization protective layer is formed on the titanium dioxide nano-wire, so that the dye molecules are prevented from dropping from the interface so as to greatly improve the stability of the titanium dioxide photo anode. The method is simple to operate and high in compatibility; an optical and electrical test proves that the original photoelectric property of the photo anode can be still kept after the photo anode, which is processed by the method, is stored in the air for a long time; and therefore, the method can be widely applied to the surface modification of the dye-sensitized solar cells for improving the stability and prolonging the service life of the cells.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a method for modifying the photoanode of a dye-sensitized solar cell. Background technique [0002] Due to the increasing depletion of traditional conventional energy and the aggravation of environmental problems, it is urgent to develop clean and renewable energy to meet the increasing energy demand of human beings. Photovoltaic cells are an important form of renewable energy. However, the current photovoltaic power generation mainly uses silicon-based battery packs, but this type of battery has strict requirements on materials, resulting in high production costs. Dye-sensitized solar cells (DSSCs) are a new type of solar cells, which have many advantages such as low cost, easy fabrication, and strong structural controllability, and are considered to have great potential to replace traditional photovoltaics. Battery. [0003] In addition to efficiency factors, stability...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 郝远强张银堂朱旭刘宝霞常竹崔亚丽徐茂田
Owner SHANGQIU NORMAL UNIVERSITY
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