A kind of preparation method of front silver paste

A technology of silver paste and organic carrier, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, electrical components, etc., which can solve the problem of affecting the electrical performance of batteries, the difficulty of slurry passing through the screen, and photoelectric efficiency. Reduce problems such as improving performance consistency, facilitating uniform dispersion, and avoiding uneven dispersion

Active Publication Date: 2016-11-23
JIANGSU RUIDE NEW ENERGY TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high solid content of the paste, if the organic carrier is mixed with glass powder and silver powder at room temperature, the high viscosity of the system will affect the uniformity of dispersion during mixing, and agglomeration between silver powder and glass powder is easy to occur, especially The reason is that hydrogen bonds will be formed between the surfaces of the glass powder to cause hard agglomeration, and the hard agglomeration is difficult to break up by mechanical means, which makes it difficult for the slurry to pass through the screen during the screen printing process and block the screen, thus affecting the battery's electrical capacity. Performance, so that the photoelectric efficiency is reduced, it is difficult to meet the requirements of high-efficiency solar cells

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present invention is a kind of preparation method of front silver paste, and this method comprises the following steps successively:

[0028] (1) Mix 12% ethyl cellulose, 2% dioctyl phthalate and 86% butyl carbitol by weight percentage, heat to 60~90°C in a water bath, and stir until ethyl cellulose and The dioctyl phthalate is completely dissolved, and the stirring speed is 80-200 rpm to obtain an organic vehicle, and the organic vehicle is kept in a low-viscosity jelly state at 30-40°C for use;

[0029] (2) 93% particle size is 0.1~5 by weight percentage mu m silver powder and 7% particle size is 0.1~3 mu The glass powder of m is added to a ball mill or other mechanical mixer for 5-15 minutes until the solid mixture presents a uniform appearance;

[0030] (3) 1.5kg of the organic carrier obtained in step (1) is added to the rotary mixer, and then 8.5kg of the solid mixture obtained in step (2) is poured into the rotary mixer, and slowly rotated at a speed of 80 ...

Embodiment 2

[0035] The present invention is a kind of preparation method of front silver paste, and this method comprises the following steps successively:

[0036] (1) Mix 12% ethyl cellulose, 2% dioctyl phthalate and 86% butyl carbitol by weight percentage, heat to 60~90°C in a water bath, and stir until ethyl cellulose and The dioctyl phthalate is completely dissolved, and the stirring speed is 80-200 rpm to obtain an organic vehicle, and the organic vehicle is kept in a low-viscosity jelly state at 30-40°C for use;

[0037] (2) 93% particle size is 0.1~5 by weight percentage mu m silver powder and 7% particle size is 0.1~3 mu The glass powder of m is added to a ball mill or other mechanical mixer for 5-15 minutes until the solid mixture has a uniform appearance;

[0038] (3) 1.5kg of the organic carrier obtained in step (1) is added to the rotary mixer, then 0.2g of zinc oxide additive is added to the rotary mixer, stirred at a speed of 200 rpm until the appearance is uniform, and t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a preparation method of front silver paste. In the method, the organic carrier is prepared and maintained at 30-40°C, so that the organic carrier is in a low-viscosity colloidal state; in this low-viscosity colloidal state, the organic The carrier is mixed with other components of the silver paste, especially the solid powder, which is conducive to the uniform dispersion of the solid powder in the silver paste and avoids local agglomeration. In addition, this method pre-mixes the silver powder and glass powder to ensure the uniformity of the dispersion of the glass powder around the silver powder, and then adds the solid mixture formed by the silver powder and glass powder to the dispersed organic carrier to make the silver powder and glass The powders are each uniformly dispersed in the organic vehicle. Since the content of the additive is less than that of the mixture of silver powder and glass powder, this method also adds the additive to the organic vehicle first, and then adds the pre-mixed silver powder and glass powder to the organic vehicle, so it is beneficial to the additive in the silver paste. evenly dispersed.

Description

technical field [0001] The invention relates to a preparation method of silver paste, in particular to a preparation method of front silver paste. Background technique [0002] A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, the solar cell will generate current, collect and transmit electricity through grid lines and electrodes. The front electrodes and grid lines of solar cells are generally made of conductive silver paste through high-speed and high-precision screen printing, low-temperature printing, and high-temperature sintering. Among the electronic pastes for solar cells, front-side silver pastes have the greatest impact on the efficiency of solar cells, and are mainly composed of four parts: silver powder, glass powder, additives and organic vehicles. [0003] There are many reports on the preparation methods of front-side silver paste, and the general method is: first prepare organic vehicle...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22H01L31/0224
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap