Preparation method of graphene compound silver paste and graphene compound 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: 2014-05-21
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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example takes the example of making a leaded conductive silver paste for the anode of a solar cell, and the percentages of its components are as follows: silver / graphene composite 80wt%, silver-coated glass powder 3wt%, organic carrier 15wt%, inorganic additive 2wt% %. After fully dispersing each component on a three-roll machine, the viscosity is adjusted by measuring the viscosity, so as to obtain a uniform silver paste for solar cells. Its preparation method is specifically:

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

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

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

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

[0039] 4...

Embodiment 2

[0052] This example takes the example of making a lead-free conductive silver paste for the positive electrode of a solar cell. The percentages of its components are as follows: silver / graphene composite 74wt%, silver-coated glass powder 5wt%, organic carrier 19.5wt%, inorganic additives 1.5 wt%. After fully dispersing each component on a three-roll machine, the viscosity is adjusted by measuring the viscosity, so as to obtain a uniform silver paste for solar cells. Its preparation method is specifically:

[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. Prepare 50 mL of reducing solution (B solution), 0.528 g of ascorbic acid, 0.34 g of PVP, deionized water as the solvent, and adjust the pH value of the reducing solution to 4 with 6% ammonia water;

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

Embodiment 3

[0070] This example takes the production of a back silver paste for solar cells as an example. The percentages of its components are as follows: silver / graphene composite 72wt%, silver-coated glass powder 5wt%, organic vehicle 21wt%, and inorganic additives 2wt%. After fully dispersing each component on a three-roll machine, the viscosity is adjusted by measuring the viscosity, so as 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. Prepare 500mL of reducing solution (B solution), 5.28g of ascorbic acid, 3.40g of PVP, deionized water as the solvent, and adjust the pH value of the reducing solution to 4 with 10% ammonia water;

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

[0075] 4. Keep solution B under stirring and ultrasonic conditions, and...

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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, the global energy shortage and environmental pollution are facing more and more serious challenges. According to estimates, by 2050, the oil resources on the earth will be exhausted. By then, 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 such as solar energy and wind energy. As far as our country is concerned, the government has planned to invest 500 billion yuan before 2020 to speed up the construction of new energy sources. Among them, solar energy has the advantages of being inexhaustible, inexhaustible, clean and harmless, and completely reliable. The development and utilization ...

Claims

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Application Information

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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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