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Graphene composite silver paste preparation method and graphene composite silver paste

A graphene composite and graphene technology, applied in the field of solar cells, can solve problems such as poor performance and stability, and achieve the effects of good stability and good electrical performance

Active Publication Date: 2017-02-22
成都中金黎阳新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the current conductive silver paste in solar cells with poor electrical properties and stability, and provide a preparation method for graphene composite silver paste and graphene composite silver paste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example takes the production of a leaded conductive silver paste for solar cell anodes as an example. The percentages of each component are as follows: silver / graphene composite 80wt%, silver-coated glass powder 3wt%, organic carrier 15wt%, inorganic additives 2wt %. After the components are fully dispersed on a three-roller, the viscosity is measured and the viscosity is adjusted to obtain a uniform silver paste for solar cells. The preparation method is specifically as follows:

[0035] 1) Preparation of silver / graphene composite: 0.2wt% graphene, the balance is silver powder

[0036] 1. Prepare 100 mL of 0.1mol / L silver nitrate solution (A solution);

[0037] 2. Configure 100mL of reducing solution (B solution), ascorbic acid is 1.056g, PVP is 0.68g, solvent is deionized water, adjust the pH of the reducing solution to 4 with 6% ammonia;

[0038] 3. Add 0.2g graphene to B solution, stir for 15min, and ultrasonic for 15min;

[0039] 4. Keep the B solution under stirring...

Embodiment 2

[0052] This example takes the production of a lead-free conductive silver paste for solar cell positive electrodes as an example. The percentages of the components are as follows: silver / graphene composite 74wt%, silver-coated glass powder 5wt%, organic carrier 19.50wt%, inorganic additives 1.5wt%. After the components are fully dispersed on a three-roller, the viscosity is measured and the viscosity is adjusted to obtain a uniform silver paste for solar cells. The preparation method is specifically as follows:

[0053] 1) Preparation of silver / graphene composite: graphene 0.1wt%, the balance is silver powder

[0054] 1. Prepare 50mL of 0.1mol / L silver nitrate solution (A solution);

[0055] 2. Configure 50mL of reducing solution (B solution), 0.528g of ascorbic acid, 0.34g of PVP, and deionized water as the solvent. Adjust the pH of the reducing solution to 4 with 6% ammonia;

[0056] 3. Add 0.1g graphene to solution B, stir for 15min, and ultrasonic for 15min;

[0057] 4. Keep the ...

Embodiment 3

[0070] This example takes the production of a back silver paste for solar cells as an example. The percentages of the components are as follows: silver / graphene composite 72wt%, silver-coated glass powder 5wt%, organic carrier 21wt%, and inorganic additive 2wt%. After the components are fully dispersed on a three-roller, the viscosity is measured and the viscosity is adjusted to obtain a uniform silver paste for solar cells.

[0071] 1) Preparation of silver / graphene composite: graphene 1wt%, the balance is silver powder

[0072] 1. Prepare 500mL of 0.1mol / L silver nitrate solution (A solution);

[0073] 2. Configure 500mL of reducing solution (B solution), 5.28g of ascorbic acid, 3.40g of PVP, and deionized water as the solvent. Adjust the pH of the reducing solution to 4 with 10% ammonia;

[0074] 3. Add 1g of graphene to solution B, stir for 15min, and ultrasonic for 15min;

[0075] 4. Keep the B solution under stirring and ultrasonic, and add the A solution in parallel to it at a s...

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Abstract

The invention relates to a solar cell technology, aims to solve the problem of poor electrical performance and stability of conductive silver paste in the conventional solar cell, and provides a preparation method of graphene compound silver paste and the graphene compound silver paste. According to the technical scheme, the preparation method of the graphene compound silver paste comprises the following steps: preparing a silver / graphene compound, and preparing silver-coated glass powder; preparing an organic carrier; mixing the obtained silver / graphene compound, the silver-coated glass powder, the organic carrier and an inorganic additive as required, dispersing fully, measuring the viscosity, and adjusting the viscosity to obtain uniform graphene compound silver paste. The graphene compound silver paste has the beneficial effects of higher electrical performance and higher stability, and is suitable for conductive silver paste.

Description

Technical field [0001] The invention relates to solar cell technology, in particular to graphene composite silver paste used in solar cells and a preparation method thereof. Background technique [0002] After entering the 21st century, global energy shortages and environmental pollution are facing increasingly severe challenges. According to estimates, by 2050, the oil resources on the earth will be exhausted. At that time, if a new energy supply system has not been established, a global energy crisis will occur. In order to prevent the above situation from happening, the world has vigorously developed renewable clean energy sources such as solar energy and wind energy. As far as my country is concerned, the government has planned to invest 500 billion yuan by 2020 to speed up the construction of new energy. Among them, solar energy has the advantages of inexhaustible, inexhaustible, clean and harmless, and completely reliable. The development and utilization of solar energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22H01B1/24H01L31/0224
Inventor 何泓材罗斐斐王宁任双双钱能胡巍汪兴
Owner 成都中金黎阳新材料科技有限公司
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