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

Back aluminum paste for water-based crystalline silicon solar cell and preparation method of back aluminum paste

A technology of solar cells and crystalline silicon, which is applied in circuits, electrical components, semiconductor devices, etc., can solve the problems of large odor, fluidity and flatness of aluminum paste, and achieve excellent flatness, high operation tolerance, and good fluidity Effect

Pending Publication Date: 2022-03-18
大连海外华昇电子科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] According to the above-mentioned technical problems that the existing aluminum paste has large odor, fluidity and flatness and other performance defects, a water-based back aluminum paste for crystalline silicon solar cells and its preparation method are provided

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Back aluminum paste for water-based crystalline silicon solar cell and preparation method of back aluminum paste
  • Back aluminum paste for water-based crystalline silicon solar cell and preparation method of back aluminum paste
  • Back aluminum paste for water-based crystalline silicon solar cell and preparation method of back aluminum paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of preparation of water-based crystalline silicon solar cell back aluminum paste, comprises the steps:

[0052] S1, preparation of water-based adhesive

[0053] Weigh 6 parts of rheological additive AQ-600, 74.5 parts of deionized water, and 0.1 part of surfactant SDS, stir with a blade-type high-speed dispersing mixer at a low speed (600-800rpm / min) for 5-10min, and then add 3 parts of water-soluble resin HEC, increase the speed to 2500-3000rpm / min, during this period, the viscosity of the system will rise sharply, and the temperature will also rise to 50-55°C, keep stirring at this temperature for 10-15min, and then add deionized 16 parts of water, 0.4 parts of fumed silica, continue to disperse at this speed for 5 minutes, and then filter while hot to obtain an organic binder, which is named OG-1.

[0054] S2, preparation of lead-free glass powder

[0055] Weigh Bi 2 o 3 35 copies, B 2 o 3 15 parts, SiO 2 20 parts, ZnO 15 parts, Sb 2 o 3 9 parts, ...

Embodiment 2

[0059] A kind of preparation of water-based crystalline silicon solar cell back aluminum paste, comprises the steps:

[0060] S1, preparation of water-based adhesive

[0061] Weigh 8 parts of rheology additive AQ-600, 72.5 parts of deionized water, and 0.1 part of surfactant SDBS, stir with a blade-type high-speed dispersing mixer at a low speed (600-800rpm / min) for 5-10min, and then add 3 parts of water-soluble resin HEC, 2 parts of HPMC, increase the speed to 2500-3000rpm / min, during this period, the viscosity of the system will rise sharply, and the temperature will also rise to 50-55°C, keep stirring at this temperature for 10-15min, Then add 14 parts of deionized water and 0.4 parts of fumed silica, continue to disperse at this speed for 5 minutes, and then filter while hot to obtain an organic binder, which is named OG-2.

[0062] S2, preparation of lead-free glass powder

[0063] Weigh Bi 2 o 3 39 copies, B 2 o 3 15 parts, SiO 2 15 parts, ZnO 10 parts, Sb 2 o...

Embodiment 3

[0067] A kind of preparation of water-based crystalline silicon solar cell back aluminum paste, comprises the steps:

[0068] S1, preparation of water-based adhesive

[0069] Weigh 10 parts of rheology additive AQH-800, 71.5 parts of deionized water, and 0.05 part of surfactant tetrabutylammonium bromide, and stir with a blade-type high-speed dispersing mixer at a low speed (600-800rpm / min) for 5-10min, Then add 2 parts of water-soluble resin HEC, 1 part of HPMC, and 1 part of MC while stirring, and increase the speed to 2500-3000rpm / min. During this period, the viscosity of the system will rise sharply, and the temperature will also rise to 50-55°C. Keep stirring at this temperature for 10-15 minutes, then add 14 parts of deionized water and 0.45 parts of fumed silica, continue to disperse at this speed for 5 minutes, and then filter while hot to obtain an organic binder named OG-3.

[0070] S2, preparation of lead-free glass powder

[0071] Weigh Bi 2 o 3 32 copies, B ...

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
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention provides back aluminum paste for a water-based crystalline silicon solar cell and a preparation method of the back aluminum paste. The back aluminum paste is composed of the following components in percentage by mass: 70-76% of aluminum powder, 0.8-1.5% of an inorganic binder, 20-25% of an organic binder, 2-4% of an organic auxiliary agent and 1-2% of a metal oxide, and the sum of the mass percentages of all the components is 100%. The method comprises the following steps: mixing the raw materials according to the ratio, fully stirring and uniformly mixing, and grinding by a three-roller grinder until the fineness is less than or equal to 20 microns. The added solvent is water, the back aluminum paste is environment-friendly and cost-saving, the prepared back aluminum paste has the advantages of good fluidity, high printing adaptability, good contact with a window, excellent compactness of an aluminum film and the like, an aluminum back surface field is formed on a silicon wafer after the paste is subjected to silk-screen printing, drying and sintering, the adhesive force of the aluminum back surface field is high, the warping degree of a battery piece is low, and the electrical property is good.

Description

technical field [0001] The invention relates to the technical field of crystalline silicon solar cells, in particular to a back aluminum paste for water-based crystalline silicon solar cells and a preparation method thereof. Background technique [0002] Aluminum paste for silicon solar cells is the main component of solar electronic pastes, used to form the back surface field of silicon solar cells, and also used as the back electrode of solar cells. The aluminum paste for silicon solar cells is mainly composed of inorganic powder (mainly including bonding phase glass powder and functional phase aluminum powder) and organic carrier. During the sintering process, the aluminum layer and the silicon layer form a silicon-aluminum alloy layer, thereby forming a doped layer, which increases the open circuit voltage of the cell. [0003] Conventional aluminum paste resins are one or more of ethyl cellulose, phenolic resins, epoxy resins, alkyd resins, etc., preferably EC. The or...

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): H01B1/16H01B1/22H01L31/0224
CPCH01B1/16H01B1/22H01L31/022425
Inventor 陈将俊高珺刘春静郭兴南吴博李岩纪煊
Owner 大连海外华昇电子科技有限公司