Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Solar positive silver paste with high aspect ratio and preparation method thereof

A high aspect ratio, solar energy technology, applied in the direction of cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, electrical components, etc., to achieve the effect of increasing aspect ratio, improving rheology, and improving conversion efficiency

Active Publication Date: 2017-06-23
无锡晶睿光电新材料有限公司 +1
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the best silver paste made by American DuPont Company in the world can only achieve an aspect ratio of about 0.4.

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] A method for preparing a solar front silver paste with a high aspect ratio, comprising the steps of:

[0037] (1) Preparation of organic phase carrier

[0038] 4.7 parts of N-type ethylcellulose with 45% ethoxylate content, 8.7 parts of T-type ethylcellulose with 50% ethoxylate content, 13.3 parts of tributyl phosphate, 13.3 parts of dipentaerythritol ester, hydrogenated castor oil 13.3 parts, Tween 20:10 parts, 36.7 parts of diethylene glycol butyl ether acetate, after mixing evenly, heated and stirred at 45°C for 30 minutes to make a uniform and transparent solution, that is, to prepare an organic phase carrier;

[0039] (2) Preparation of glass paste

[0040] Take 3 parts of glass powder with a D50 of 0.6 μm and a Tg point of 262 °C, and 15 parts of the organic phase carrier prepared in step (1), disperse evenly on a disperser, and roll on a three-roll machine to a fineness below 5um to obtain a glass slurry;

[0041] (3) Preparation of silver paste

[0042] Take...

Embodiment 2

[0045] A method for preparing a solar front silver paste with a high aspect ratio, comprising the steps of:

[0046] (1) Preparation of organic phase carrier

[0047] 4.2 parts of N-type ethyl cellulose with 45% ethoxy content, 4.2 parts of T-type ethyl cellulose with 50% ethoxy content, 4.2 parts of dibutyl phthalate, 12.5 parts of dipentaerythritol ester, 1.7 parts of polyamide-modified hydrogenated castor oil, Tween 80:8.3 parts, and 64.9 parts of terpineol were mixed evenly, and heated and stirred at 50°C for 40 minutes to make a uniform and transparent solution, which was formulated as an organic phase carrier;

[0048] (2) Preparation of glass paste

[0049] Take 3 parts of glass powder with a D50 of 0.9 μm and a Tg point of 439 ° C, and 12 parts of the organic phase carrier prepared in step (1), and disperse evenly on the disperser, and then roll it on a three-roller machine until the fineness is below 5um to obtain glass slurry;

[0050] (3) Preparation of silver pa...

Embodiment 3

[0054] A method for preparing a solar front silver paste with a high aspect ratio, comprising the steps of:

[0055] (1) Preparation of organic phase carrier

[0056] 8 parts of N-type ethyl cellulose with an ethoxy content of 45%, 11.4 parts of dioctyl adipate, 17 parts of tributyl phosphate, 5.7 parts of fumed silica, Tween 80: 5.7 parts, mixed two After mixing 52.2 parts of dibasic acid ester (DBE) evenly, heat and stir at 65°C for 20 minutes to make a uniform and transparent solution, that is, to prepare an organic phase carrier;

[0057] (2) Preparation of glass paste

[0058] Take 1.2 parts of glass powder with a D50 of 2.0 μm and a Tg point of 340 ° C, and 8.8 parts of the organic phase carrier prepared in step (1) are uniformly dispersed on the disperser, and then rolled on a three-roll machine to a fineness of 5 μm or less to obtain a glass slurry;

[0059] (3) Preparation of silver paste

[0060] Take 90 parts of silver powder with a D50 of 1.2 μm and a tap densi...

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 sizeaaaaaaaaaa
Tap densityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a solar positive silver paste with high aspect ratio. The solar positive silver paste comprises, by weight, 82 to 90 percent of conductive phase silver powder, 1 to 3 percent of inorganic phase glass powder and 7 to 15 percent of organic phase carrier. The organic phase carrier comprises, by weight, 15 to 30 percent of plasticizer, 7 to 15 percent of ethyl cellulose, 1 to 15 percent of thixotropic agent, 0 to 12 percent of surfactant, and the balance of solvent. According to the invention, the prepared silver paste has excellent screen printing property, and the aspect ratio of a printed line is high.

Description

technical field [0001] The invention relates to the technical field of silver paste manufacturing, in particular to a solar cell front silver paste with excellent screen printability and high aspect ratio of lines after printing. Background technique [0002] In solar cells, the screen printing process is generally used to print the front electrode onto the silicon wafer, and then dry and sinter to form a metal electrode. The cost required for screen printing is low, which is conducive to realizing the industrialization and large-scale production of solar cells. This requires the solar front silver paste to have good screen printability. During continuous and long-term printing, the paste can maintain stable viscosity and excellent screen performance. It is also necessary to ensure that the printed lines have good plasticity. Shape and high aspect ratio. [0003] The solar positive silver paste suitable for screen printing generally consists of three parts: conductive phas...

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
IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425
Inventor 张超李亮
Owner 无锡晶睿光电新材料有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com