Reduced graphene oxide nano-silver paste and preparation method and application thereof

A nano silver paste, graphene technology, applied in nanotechnology, conductive materials dispersed in non-conductive inorganic materials, etc., can solve problems such as low conversion efficiency, and achieve the effects of reducing production costs, reducing electrode shading, and low resistance

Inactive Publication Date: 2014-12-17
WUXI GUANGFU PHOTOVOLTAIC MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anti-reflective layer and surface treatment can reduce surface reflection and increase photocurrent to improve efficiency. The positive electrode silver paste is used on the sun-absorbing surface of the solar cell. Various manufacturers have made efforts to reduce the shading ratio, including increasing the aspect ratio, so as to reduce electrode shading ratio, but there is still the problem of shading the anti-reflection layer resulting in low conversion efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of reduced graphene oxide nano silver wire compound:

[0027] Using a reducing agent as a solvent, adding silver nitrate and additives to prepare a silver nitrate solution with a silver nitrate concentration of 0.2-0.8 mol / L, wherein the weight of the additive is 0.01-0.1 times the mass of silver nitrate; the graphene oxide solution of 0.1-1 mol / L Mix with the prepared 0.2-0.8mol / L silver nitrate solution at a volume ratio of 1:0.8-1.2, then add a dispersant whose mass is 0.5-3 times the mass of silver nitrate, and then raise the solution temperature to 75- React at 95°C for 12-48h, cool the obtained reaction solution to room temperature naturally, then centrifuge the reaction solution, wash the obtained solid with deionized water, and dry at 40-60°C to obtain the reduced graphene oxide nano silver wire compound.

[0028] The reducing agent is one of hydrazine hydrate and ethylene glycol; the additive is at least one of the halogen compound zinc chloride, te...

Embodiment 2

[0048] Preparation of reduced graphene oxide nano silver wire compound:

[0049] Taking hydrazine hydrate as a solvent and adding silver nitrate and zinc chloride to prepare a silver nitrate solution with a silver nitrate concentration of 0.5mol / L, wherein the quality of zinc chloride is 0.05 times the quality of silver nitrate; the graphene oxide solution of 0.5mol / L is mixed with The prepared 0.5mol / L silver nitrate solution was mixed at a volume ratio of 1:1, and then polyvinylpyrrolidone whose mass was twice the mass of silver nitrate and whose K value was 30 was added, and then the temperature of the solution was raised to 85°C for 25 hours under a nitrogen atmosphere. , the obtained reaction solution was naturally cooled to room temperature, and then the reaction solution was centrifuged, and the obtained solid was washed with deionized water and dried at 50° C. to obtain a reduced graphene oxide nanosilver wire compound.

[0050] Preparation of glass powder:

[0051] T...

Embodiment 3

[0068] Preparation of reduced graphene oxide nano silver wire compound:

[0069] Take ethylene glycol as solvent and add silver nitrate, tetrabutylammonium chloride preparation silver nitrate concentration and be the silver nitrate solution of 0.6mol / L, wherein, tetrabutylammonium chloride quality is silver nitrate quality 0.05 times; 1 L of graphene oxide solution was mixed with the prepared 0.6mol / L silver nitrate solution at a volume ratio of 1:0.9, and then triethanolamine whose mass was 1.5 times the mass of silver nitrate was added, and then the temperature of the solution was raised to 85°C under a nitrogen atmosphere. After reacting for 13 hours, the obtained reaction solution was naturally cooled to room temperature, and then the reaction solution was centrifuged, and the obtained solid was washed with deionized water and dried at 50°C to obtain a reduced graphene oxide nanosilver wire compound.

[0070] Preparation of glass powder:

[0071] The glass powder composit...

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Abstract

The invention relates to a reduced graphene oxide nano-silver paste and a preparation method and application thereof, and belongs to the field of solar cell manufacture. The reduced graphene oxide nano-silver paste is prepared by evenly mixing 50-85% of reduced graphene oxide nano-silver wire compound, 0-10% of glass powder and 15-45% of organic binder in percentage by weight together by use of a stirrer and then rolling the mixture until the fineness is below 15 microns. The reduced graphene oxide nano-silver paste having a light transmission property is capable of helping to reducing the influence of light shading by an electrode, and further is advantageous for improving the conversion efficiency of a solar cell due to low resistance and high conduction density; as a result, the reduced graphene oxide nano-silver materials can be used as a positive silver paste of the solar cell, the content of silver in the existing positive silver paste is reduced and the production cost is greatly reduced, and as a result, the green energy source can be further popularized favorably.

Description

technical field [0001] The invention relates to a reduced graphene oxide nano-silver paste, in particular to a reduced graphene oxide nano-silver paste on the front of a solar cell, a preparation method and an application thereof. Background technique [0002] Graphene is a sp 2 Hybridized orbitals form a monolayer of hexagonal carbon atoms in a honeycomb lattice, but scientists have always doubted its existence. They believe that the single-layer two-dimensional atomic structure is unstable, and experiments have also proved that when the thickness is reduced to tens of atomic layers, the film becomes unstable, so the two-dimensional plane atomic layer has always been considered as a part of the three-dimensional structure , cannot exist alone, so graphene has been regarded as a hypothetical structure. Until 2004, Andre Geim and Konstantin Novo, physicists at the University of Manchester in the United Kingdom, successfully obtained a single layer of graphene by using the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/24B22F9/24B82Y40/00
Inventor 黄巧茵许显光张黎
Owner WUXI GUANGFU PHOTOVOLTAIC MATERIALS
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