Method for preparing counter electrode of dye-sensitized solar cell

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve the problems of high platinum price, small specific surface area and unfavorable industrial application of batteries, etc., and achieve low production cost, good thermal conductivity and mechanical properties, and good electrical conductivity Effect

Inactive Publication Date: 2011-02-16
IRICO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of platinum is too high, and the small specific surface area is not conducive to the industrial application of batteries. Therefore, finding cheap and high-performance counter electrode materials has become an urgent problem to be solved.

Method used

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  • Method for preparing counter electrode of dye-sensitized solar cell
  • Method for preparing counter electrode of dye-sensitized solar cell
  • Method for preparing counter electrode of dye-sensitized solar cell

Examples

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Embodiment 1

[0020] Embodiment 1: the preparation of the counter electrode of the universal conductive carbon film based on monolayer graphene

[0021] 1) Prepare single-layer graphene by chemical oxidation method. 10 g of graphite and 7 g of sodium nitrate (analytical pure) were added to the flask, and then 500 mL of concentrated sulfuric acid (analytical pure) was added. Then in an ice-water bath, slowly add 40 g of potassium permanganate while stirring, the addition time is controlled at 2 hours, and then kept for 2 hours to cool down to room temperature. Stir at room temperature for 10 days, the reaction solution first turns green, then dark brown, and finally brick brown, and viscous, slowly add the reaction solution to 1000mL of 5wt% dilute sulfuric acid, the addition time is controlled at 2h, keep stirring , the temperature was controlled at 98°C. The reaction solution was stirred at this temperature for another 2 h, and then cooled to 60 °C. Add 30 mL of hydrogen peroxide (30% a...

Embodiment 2

[0025] Example 2: Preparation of a transparent conductive carbon film counter electrode based on single-layer graphene

[0026] 1) prepare single-layer graphene according to the method of embodiment 1 step 1). Add 1g of single-layer graphene into water, and process it with 500W ultrasonic treatment for 30 minutes to completely dissolve it; the concentration range of graphene solution is 0.5mg / ml;

[0027] 2) The monolayer graphene aqueous solution is coated on the surface of the glass substrate by the method of spin coating, and placed at room temperature for 72h; after drying, the film of the monolayer graphene is obtained;

[0028] 3) then placing the glass substrate loaded with a single-layer graphene film in an airtight container, and fumigation with hydrazine hydrate steam for 24h to obtain a single-layer graphene film reduced by hydrazine steam;

[0029] 4) Place the glass substrate of the single-layer graphene film reduced by hydrazine vapor in a tube furnace, and bake...

Embodiment 3

[0030] Example 3: Preparation of a general-purpose conductive carbon film counter electrode based on multilayer graphene

[0031] 1) Prepare multilayer graphene according to the method reported in the literature (carbon, 2004, 42, 2929), and the obtained product is centrifuged to obtain a mixture of 2 layers of graphene. Add 1g of multi-layer graphene into water, and process it through 500w ultrasonic treatment for 60min to completely dissolve it; the concentration range of graphene solution is 1mg / ml;

[0032] 2) Add 0.5g sodium borohydride, stir, and react at 80°C for 2h, the solution turns from brown to black, and the reduced graphene dispersion is obtained; after mixing the above graphene dispersion with an aqueous carrier, use a screen to The printing method is printed on the surface of the conductive glass substrate to form a film, and placed at room temperature for 48 hours; after drying, a multi-layer graphene film is obtained;

[0033] 3) Then, under the protection o...

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Abstract

The invention discloses a method for preparing a counter electrode of a dye-sensitized solar cell, which comprises the following steps of: 1) preparing water-soluble single-layer or multi-layer graphene from graphite through a chemical oxidation method, or preparing organically water-soluble single-layer or multi-layer graphene from the graphite through an organic functional method; 2) preparing the water-soluble or organically water-soluble single-layer or multi-layer graphene onto the surface of a glass substrate for molding, and airing to prepare a thin film of the single-layer or multi-layer graphene; and 3) reducing the glass substrate with the thin film of the single-layer or multi-layer graphene by using a reducing agent, or calcining under the protection of nitrogen or argon to obtain the counter electrode of the dye-sensitized solar cell, which is coated with the single-layer or multi-layer grapheme film on the surface of the glass substrate. Electrons generated by a dye-sensitized TiO2 thin-film electrode are transferred to electrolyte to finish a cycle, so the optical energy is converted into electric energy and the photoelectric conversion efficiency of the cell is improved.

Description

technical field [0001] The invention relates to a solar cell, in particular to a method for preparing a counter electrode of a dye-sensitized solar cell. Background technique [0002] Since the beginning of the 21st century, the problems faced by human beings in the fields of energy and environment have become increasingly prominent. On the one hand, there is a huge demand for energy from economic development; on the other hand, the traditional fossil energy such as coal, oil, and natural gas, which have been accumulated for hundreds of millions of years, has been irreversibly exhausted after hundreds of years of huge consumption, and the development and utilization of traditional fossil energy The process will cause serious harm to the ecological environment. How to effectively solve the two practical problems has attracted more and more attention at home and abroad. [0003] Dye-sensitized solar cells are mainly composed of the following parts: photoanode, electrolyte an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M14/00H01G9/042H01L51/48H01G9/20C03C17/22
CPCY02E10/542Y02E10/549
Inventor 杨志军
Owner IRICO
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