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Flexible composite counter electrode of dye-sensitized solar battery and preparation method thereof

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve the problems of flexible substrates that are not resistant to high temperature and the use of flexible conductive substrates, and achieve the effects of easy large-area preparation, high conductivity, and strong adhesion

Active Publication Date: 2012-03-21
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low temperature resistance of flexible substrates makes it difficult to use this widely recognized pyrolytic platinum method on flexible conductive substrates.

Method used

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  • Flexible composite counter electrode of dye-sensitized solar battery and preparation method thereof
  • Flexible composite counter electrode of dye-sensitized solar battery and preparation method thereof
  • Flexible composite counter electrode of dye-sensitized solar battery and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] A method for preparing a flexible FTO / platinum / carbon composite counter electrode, the method comprising the following steps:

[0040] Step 1): Take a graphite block as a substrate, and print a layer of H2PtCl6 solution on its surface by screen printing method. After leveling, put it in a 70°C oven to dry, take it out, and then put it in the groomer The high-temperature pyrolysis treatment was carried out in the furnace for 5 minutes, and the temperature in the muffle furnace was set to 360 ° C. After cooling down, the graphite substrate 1 with a layer of pyrolytic platinum on the surface was obtained. Particle composition, the particle diameter is between 5nm and 10nm;

[0041] Step 2): Take the graphite with pyrolytic platinum attached to the surface of step 1) as the substrate, place it on the heating platform in the ultrasonic spray pyrolysis device, and control its surface temperature to 350 ° C; prepare the prepared SnCl ethanol mixed with NH4F The solution (its ...

example 2～8

[0046] Examples 2 to 8 were prepared according to the method of Example 1, and their battery efficiency was tested, and the results are shown in Table 1 below.

[0047] Table 1. The battery efficiency of the flexible composite counter electrode obtained under different experimental conditions based on Examples 1-8

[0048]

[0049]

[0050] From the above results, it can be seen that the flexible counter electrodes prepared in Examples 2 and 3 have better cell efficiency, which can reach about 94% of the effect of pyrolytic platinum counter electrodes (PT) on traditional FTO glass.

example 9

[0052] A method for preparing a flexible FTO / platinum / carbon composite counter electrode, the method comprising the following steps:

[0053] Step 1): Take a piece of copper, attach a layer of graphite to its surface, and then scrape a layer of H on the graphite surface by scraping 2 PtCl 6 solution, put it in an oven at 70°C and take it out after drying, then put it in a muffle furnace for high-temperature pyrolysis treatment for 10 minutes, set the temperature in the muffle furnace to 400°C, and take it out after cooling to obtain graphite A layer of pyrolytic platinum on the surface of the substrate; it is measured that the layer of pyrolytic platinum is composed of platinum particles with a particle diameter of 2 nm to 10 nm;

[0054] Step 2): Take the sample with pyrolyzed platinum attached to the graphite on the surface of the copper sheet in step 1) as the substrate, put it on the heating table in the ultrasonic spray pyrolysis device, and control its surface temperatu...

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Abstract

The invention provides a flexible composite counter electrode of a dye-sensitized solar battery and a preparation method thereof. The flexible composite counter electrode comprises a flexible transparent substrate and a catalytic active layer on the flexible transparent substrate, wherein the catalytic active layer comprises an FTO (fluorine-doped tin oxide) / platinum / carbon structure; and the thickness of the FTO film is 100nm-1mum, and the platinum is a film formed by clustering particles, and the diameter of the particle is 2nm-20nm. The invention also provides a preparation method of the flexible composite counter electrode, which firstly introduces the traditional preparation method of pyrolytic platinum into the flexible counter electrode by a mode of transferring and fixing, and ingeniously solves the contradiction between no high-temperature resistance of the flexible substrate and the need of the pyrolytic platinum for high-temperature treatment.

Description

technical field [0001] The invention relates to the field of solar cells. In particular, the present invention relates to a flexible composite counter electrode for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] As one of the third-generation photovoltaic cells, dye-sensitized solar cells have been developed since 1991 by Since the professor reported the photoanode structure of his porous membrane, it has attracted the attention of scientists all over the world for its advantages of low cost, simple process and high efficiency. [0003] Dye-sensitized solar cells include three parts: photoanode, electrolyte and counter electrode. Among them, the role of the counter electrode is to collect electrons from the external circuit, and promote these electrons to convert the I in the electrolyte 3 - ions are efficiently reduced to I - Ions are used for dye regeneration on the photoanode. Traditional dye-sensitized solar cells are pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/048H01G9/20H01M14/00H01L51/44H01L51/48
CPCY02E10/542Y02E10/549
Inventor 孟庆波黄小铭孙惠成罗艳红李冬梅
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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