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Crystalline silicon solar cell front silver paste and preparation method thereof

A technology of silver paste and crystalline silicon, which is applied in the field of solar cells, can solve problems such as difficulties, and achieve the effects of high sintering activity, low hazard, and reduced contact resistance

Active Publication Date: 2021-08-24
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Further improving the photoelectric conversion efficiency of the battery and reducing the production cost are the eternal goals pursued by the solar cell manufacturing industry. For silicon-based solar cells, it is more important to further improve the efficiency difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Dissolve 50 g of silver nitrate in 1 L of ethylene glycol, stir for 30 minutes, add 10 g of polyacrylic acid, stir at 300 rpm, 40°C for 1 hour, and obtain nano-silver powder;

[0020] (2) 15 parts of SnO 2 , 21 parts of SiO 2 , 16 parts of TiO 2 , 18 copies of Nb 2 o 5 , 18 parts of ZnO 2 The glass powder composed is ultrasonically dispersed in anhydrous ethanol solvent to prepare a glass dispersion;

[0021] (3) Add 22% ethylenediaminetetramethylene phosphoric acid into the high-speed mixer, and in the stirring state at a rotation speed of 500 rpm, first add 1 part of methyl amyl alcohol and 2 parts of anti-settling agent, and then slowly add to step (1) The prepared silver powder was turned to 1000 rpm and stirred for 3 h; under the stirring state of 500 rpm, the glass dispersion prepared in step (2) was added to the high-speed mixer at a rate of 2 mL / s, and then turned to Stir at 600 rpm for 3 h;

[0022] (4) Put the composite slurry prepared in step (3) i...

Embodiment 2

[0025] (1) Dissolve 80 g of silver nitrate in 1 L of ethylene glycol, stir for 30 minutes, add 20 g of polyacrylic acid, stir at 300 rpm, 40°C for 1 hour, and obtain nano-silver powder;

[0026] (2) 18 parts of SnO 2 , 23 parts of SiO 2 , 19 parts of TiO 2 , 15 copies of Nb 2 o 5 , 16 parts of ZnO 2 The glass powder composed is ultrasonically dispersed in anhydrous ethanol solvent to prepare a glass dispersion;

[0027] (3) Add 25% ethylenediaminetetramethylene phosphoric acid into the high-speed mixer, and in the state of stirring at a speed of 500 rpm, first add 1 part of methyl amyl alcohol and 2 parts of anti-settling agent, and then slowly add to step (1) The prepared silver powder was turned to 1000 rpm and stirred for 3 h; under the stirring state of 500 rpm, the glass dispersion prepared in step (2) was added to the high-speed mixer at a rate of 2 mL / s, and then turned to Stir at 600 rpm for 3 h;

[0028] (4) Put the composite slurry prepared in step (3) into a ...

Embodiment 3

[0031] (1) Dissolve 50 g of silver nitrate in 1 L of ethylene glycol, stir for 30 minutes, add 8 g of polyacrylic acid, stir at 300 rpm, 40°C for 1.5 hours, and obtain nano-silver powder;

[0032] (2) 18 parts of SnO 2 , 17 parts of SiO 2 , 19 parts of TiO 2 , 22 copies of Nb 2 o 5 , 25 parts of ZnO 2 The glass powder composed is ultrasonically dispersed in anhydrous ethanol solvent to prepare a glass dispersion;

[0033] (3) Add 18% ethylenediamine tetramethylene phosphoric acid into the high-speed mixer, and in the stirring state at a speed of 500 rpm, first add 1 part of methyl amyl alcohol and 2 parts of anti-settling agent, and then slowly add to step (1) The prepared silver powder was turned to 1000 rpm and stirred for 3 h; under the stirring state of 500 rpm, the glass dispersion prepared in step (2) was added to the high-speed mixer at a rate of 2 mL / s, and then turned to Stir at 600 rpm for 3 h;

[0034] (4) Put the composite slurry prepared in step (3) into a ...

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PUM

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Abstract

The invention discloses a method for preparing front silver paste of a crystalline silicon solar cell, which comprises the following steps of: adding silver powder of which the average particle size is less than or equal to 200nm and a uniformly dispersed glass powder binding phase into an organic carrier, enabling the silver powder to be in a uniformly dispersed state in the paste under the combined action of an organic dispersing agent ethylenediamine tetra (methylene phosphonic acid) and an inorganic anti-settling agent fumed silica, and preparing the front silver paste of the crystalline silicon solar cell. According to the invention, the technical problems that in the process of preparing silver powder into silver paste, gas escapes in the sintering process, printing stripe cracks are caused, and stable conduction of a front silver electrode of the battery cannot be ensured in the current front silver paste of the silicon battery are solved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a front silver paste of a crystalline silicon solar cell and a preparation method thereof. Background technique [0002] Crystalline silicon solar cells are currently the most widely used solar cells. Metallized electrodes are the key materials of crystalline silicon solar cells, especially the front gate material, which directly affects the photoelectric conversion efficiency, fill factor, series resistance and other performance indexes of solar cells. Electrode silver paste is the key material of crystalline silicon solar cell electrodes and grid line film, which plays the role of drawing out electrodes and collecting current in solar cells. The performance of electrode silver paste will greatly affect the photoelectric conversion efficiency of solar cells , and directly determines the service life and attenuation of the battery. [0003] Further improving the photoelectri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B1/02H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B1/02H01B13/00H01L31/022425Y02E10/50
Inventor 郭韬张航刘文宇高宇妍张景赛
Owner JIANGXI NORMAL UNIV
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