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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the best silver paste made by American DuPont Comp

Method used

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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...

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PUM

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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

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Application Information

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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
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