Unlock instant, AI-driven research and patent intelligence for your innovation.

Front silver paste with good thixotropy and preparation method of front silver paste

A technology of silver paste and thixotropy, which is applied in the field of front silver paste and its preparation, can solve the problems of reducing the aspect ratio of the grid line, affecting the photoelectric efficiency, and the easy collapse of the grid line, achieving a good aspect ratio and overcoming the flow Defects, easy printing effects

Active Publication Date: 2015-04-01
JIANGSU HOYI TECH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing silver paste has good thixotropy during printing, but during the high-temperature sintering process after low-temperature drying, with the volatilization of thermoplastic polymer substances such as thixotropic agents and thickeners, the formed grid lines are easy to collapse. Reduce the aspect ratio of the formed gate lines, which in turn affects the photoelectric efficiency

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

[0036] The present invention is a front silver paste with good thixotropy. The composition and weight percentage of the front silver paste are: 65% of silver powder, 8% of glass powder, 4% of copolymerized phenolic modified cellulose resin, hydrogenated castor Sesame oil 1%, balance is terpineol. Among them, the particle size of silver powder is 0.5-2.5 mu m, the surface area is 0.6-1.0m 2 / g, the tap density is 4.8-6.0g / m 3 ; Glass powder is PbO-TeO 2 -V 2 o 5 - Glass powder of ZnO system, the particle size is 0.5-3 mu m.

[0037] Wherein, the structural general formula of copolymerization type phenolic modified cellulose resin is:

[0038] ,

[0039] Among them, n and m are natural numbers.

[0040] The preparation method of above-mentioned front silver paste comprises the following steps:

[0041] S1. Preparation of copolymerized phenolic modified cellulose resin; 10 grams of cellulose was dissolved in hot phenol at a temperature of 50°C to prepare a cellulose p...

Embodiment 2

[0045] The present invention is a front silver paste with good thixotropy. The composition and weight percentage of the front silver paste are: 60% of silver powder, 1% of glass powder, 2% of copolymerized phenolic modified cellulose resin, hydrogenated castor Sesame oil 2%, BYK-111 1.5%, polyvinylpyrrolidone 1.5%, and the balance is butyl carbitol. Among them, the particle size of silver powder is 0.5-2.5 mu m, the surface area is 0.6-1.0m 2 / g, the tap density is 4.8-6.0g / m 3 ; Glass powder is PbO-TeO 2 -V 2 o 5 - Glass powder of ZnO system, the particle size is 0.5-3 mu m.

[0046] Wherein, the structural general formula of copolymerization type phenolic modified cellulose resin is:

[0047] ,

[0048] Among them, n and m are natural numbers.

[0049] The preparation method of above-mentioned front silver paste comprises the following steps:

[0050]S1. Preparation of copolymerized phenolic modified cellulose resin; dissolving 20 grams of cellulose in hot phenol...

Embodiment 3

[0054] The invention is a front silver paste with good thixotropy. The composition and weight percentage of the front silver paste are: 90% of silver powder, 2% of glass powder, 1% of copolymerized phenolic modified cellulose resin, hydrogenated castor Sesame oil 0.1%, BYK-111 0.5%, and the balance is propylene glycol butyl ether. Among them, the particle size of silver powder is 0.5-2.5 mu m, the surface area is 0.6-1.0m 2 / g, the tap density is 4.8-6.0g / m 3 ; Glass powder is PbO-TeO 2 -V 2 o 5 - Glass powder of ZnO system, the particle size is 0.5-3 mu m.

[0055] Wherein, the structural general formula of copolymerization type phenolic modified cellulose resin is:

[0056] ,

[0057] Among them, n and m are natural numbers.

[0058] The preparation method of above-mentioned front silver paste comprises the following steps:

[0059] S1. Preparation of copolymerized phenolic modified cellulose resin; dissolving 30 grams of cellulose in hot phenol at a temperature ...

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
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to front silver paste with good thixotropy and a preparation method of the front silver paste. The front silver paste comprises the following components in percentage by weight: 60 to 90 percent of silver powder, 1 to 8 percent of glass powder, 1 to 4 percent of copolymerization type phenolic modified cellulose resin, 0.1 to 2 percent of thixotropic agent, 0 to 3 percent of assistant and the balance of solvent. The front silver paste for a solar cell is easy to print and good in leveling property, the flow pattern defect in a high-temperature drying process caused by thermoplastic resin added into a traditional front silver paste can be overcome by a slight cross-linking structure generated by a thickener in a drying process, and the front silver paste has collapse resistance in a drying and sintering process. A grid wire obtained by sintering after using the silver paste to perform screen printing has good aspect ratio, and a very good shape of the grid wire is kept.

Description

technical field [0001] The invention relates to a solar cell front silver paste, in particular to a front silver paste with good thixotropy and a preparation method thereof. Background technique [0002] Solar energy is a clean and renewable new energy source, which is more and more favored by people. One application of solar cells is the conversion of solar energy into electricity by means of solar cells. In the process of manufacturing solar cells, one of the necessary steps is to screen-print grid lines as front electrodes on the panel with front-side silver paste. Wherein, the auxiliary grid lines are used to guide current, and the main grid lines are used to collect the current of the auxiliary grid lines, and play a role of aggregation. [0003] As a material for printing grid lines, the front silver paste requires the ability to achieve the aspect ratio of the grid lines, so as to refine the grid lines, reduce the light-shielding area, and improve the photoelectric ...

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 Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224H01L31/18
CPCY02P70/50
Inventor 杨贵忠陈晓蕾陈志鹏许亚文
Owner JIANGSU HOYI TECH