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
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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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