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Solar battery aluminium slurry with strong adhesive force and preparation method thereof

A technology of solar cells and strong adhesion, applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve problems such as low photoelectric conversion efficiency, serious volatilization, environmental and human poisoning, etc.

Inactive Publication Date: 2012-10-10
NINGBO GUANGBO NEW NANOMATERIALS STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) The organic binder in the slurry contains low-toxic substances, which volatilizes seriously during the preparation process, with low efficiency and great harm to the human body;
[0007] (2) Inorganic adhesive metal glass powder contains lead and other toxic elements, which are harmful to the environment and human body to a certain extent;
[0008] (3) Good ohmic contact cannot be formed between the aluminum film and the silicon substrate, and it is easy to fall off and blister, resulting in low photoelectric conversion efficiency;
[0009]⑷ In order to reduce the cost of crystalline silicon solar cells, the requirements of low warpage and strong adhesion cannot be met at the same time

Method used

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  • Solar battery aluminium slurry with strong adhesive force and preparation method thereof
  • Solar battery aluminium slurry with strong adhesive force and preparation method thereof
  • Solar battery aluminium slurry with strong adhesive force and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Aluminum powder

[0028] Commercially available spherical aluminum powder with a purity of 99.95% and an average particle size of 5.2 μm.

[0029] 2. Preparation of modified organic binder

[0030] Take by weighing 32% terpineol, 20% turpentine, 17% benzyl alcohol, 20% butyl carbitol acetate, 5% ethyl cellulose, 3.5% organosilicon compound (modified polydimethylsiloxane) Methyl siloxane), 2.5% sorbitan stearate, the above materials are mixed and heated to 80-100 ℃ to dissolve for 100 minutes to obtain a transparent colloid with good lubricity and printability.

[0031] 3. Preparation of lead-free glass powder

[0032] 40% B 2 o 3 , 35% SiO 2 , 15% Al 2 o 3 , 5% ZnO, 5% V 2 o 5 After mixing evenly with a mixer, put it into a ceramic crucible, dry it in an oven at 150 ° C for 2 h, put it in a muffle furnace, melt it at 1000 ~ 1200 ° C for 1 h, dry it after water quenching, and then use a planetary ball mill for 3 h. Dry to obtain lead-free metallic glass powd...

Embodiment 2

[0041] 1. Aluminum powder

[0042] Commercially available spherical aluminum powder with a purity of 99.95% and an average particle size of 5.2 μm.

[0043] 2. Preparation of modified organic binder

[0044] 20% terpineol, 30% turpentine, 17% benzyl alcohol, 20% butyl carbitol acetate, 8% ethyl cellulose, 1.5% organosilicon compound (modified polydimethyl siloxane), 3.5% sorbitan stearate, the above materials are mixed and heated to 80-100 ℃ to dissolve for 100 minutes to obtain a transparent colloid with good lubricity and printability.

[0045] 3. Preparation of lead-free glass powder

[0046] 27% B 2 o 3 , 40% SiO 2 , 20% Al 2 o 3 , 5% ZnO, 8% V 2 o 5 After mixing evenly with a mixer, put it into a ceramic crucible, dry it in an oven at 150 ° C for 2 h, put it in a muffle furnace, melt it at 1000 ~ 1200 ° C for 1 h, dry it after water quenching, and then use a planetary ball mill for 3 h. Dry to obtain lead-free metallic glass powder below 10μm.

[0047] 4. Prepa...

Embodiment 3

[0055] 1. Aluminum powder

[0056] Commercially available spherical aluminum powder with a purity of 99.95% and an average particle size of 5.2 μm.

[0057] 2. Preparation of modified organic binder

[0058] 45% terpineol, 13% turpentine, 8% benzyl alcohol, 18% butyl carbitol acetate, 10% ethyl cellulose, 5% organosilicon compound (modified polydimethyl siloxane), 1% sorbitan stearate, the above materials are mixed and heated to 80-100 ℃ to dissolve for 100 minutes to obtain a transparent colloid with good lubricity and printability.

[0059] 3. Preparation of lead-free glass powder

[0060] 49% B 2 o 3 , 24% SiO 2 , 15% Al 2 o 3 , 7% ZnO, 5% V 2 o 5 After mixing evenly with a mixer, put it into a ceramic crucible, dry it in an oven at 150 ° C for 2 h, put it in a muffle furnace, melt it at 1000 ~ 1200 ° C for 1 h, dry it after water quenching, and then use a planetary ball mill for 3 h. Dry to obtain lead-free metallic glass powder below 10μm.

[0061] 4. Preparati...

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Abstract

The invention discloses a solar battery aluminium slurry with a strong adhesive force. The slurry is prepared by the following components, by weight, 60% to 84% of aluminium powders, 15% to 35% of modified organic adhesives, and 1% to 10% of inorganic adhesives. In addition, the invention discloses a preparation method for the slurry. According to the invention, the solar battery aluminium slurryis free of toxic substances like lead and the like, so that the slurry will cause little harm to the human body; besides, a good ohmic contact is formed between an aluminum film and a silicon chip; awarping degree is low; a photoelectric conversion efficiency is high; and the slurry is not easy to be shed.

Description

technical field [0001] The invention relates to the technical field of aluminum paste for solar cells, in particular to an aluminum paste for solar cells with strong adhesion and a preparation method thereof. Background technique [0002] In recent years, with the increasing shortage of traditional energy sources, the photovoltaic industry represented by crystalline silicon solar cells has developed rapidly. Aluminum paste for the back field of crystalline silicon solar cells is the main component of solar electronic paste, which is used to form the electric field on the back surface of crystalline silicon solar cells, and is also used as the back electrode of solar cells. [0003] The back field aluminum paste of crystalline silicon solar cells is mainly composed of aluminum powder, organic binder and inorganic binder-metal glass powder. Aluminum powder is used as the functional phase in the aluminum electrode paste. After sintering, the aluminum powder is connected to eac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 宋财根董政邵晓东汪涛程遵义王利平
Owner NINGBO GUANGBO NEW NANOMATERIALS STOCK
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