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High-photoelectric-conversion-efficiency crystalline silicon solar battery aluminum paste and preparation method thereof

A technology for photoelectric conversion efficiency and solar cells, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the adverse effects of aluminum back field compactness and adhesion, high cost, and toxicity Large and other problems, to achieve the effect of reducing the cost of battery sheet manufacturing materials, reducing the amount of consumption, and improving electrical performance

Inactive Publication Date: 2012-01-18
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patents with publication numbers CN101425545A, CN101651155A, etc. mention adding Group III substances (boron, gallium, indium, thallium) to improve the formation of the BSF layer, but these substances are either very costly, have low reserves, or are very toxic Large, not an ideal addition
And except for boron, these additives are all soft metals, which have adverse effects on the compactness and adhesion of the aluminum back field to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Aluminum powder: the average particle size of the aluminum powder used is 5.3, and the tap density is 1.57g / cm 3 .

[0042] Organic binder:

[0043] In parts by mass, 30 parts of terpineol, 40 parts of butyl carbitol acetate, 20 parts of trimethylpentanediol isobutyrate, 1 part of Span and 2.5 parts of pump oil are mixed and added to the reactor and heated to 80~100℃, then stir and add 4.5 parts of ethyl cellulose and 2 parts of phenolic resin, dissolve and filter to obtain a clear and transparent organic adhesive.

[0044] Glass powder: 12 parts by mass of boron oxide, 65 parts of bismuth oxide, 8 parts of silicon oxide, 8 parts of zinc oxide, 3 parts of aluminum oxide, 2 parts of zirconia, 1 part of vanadium oxide and 1 part of molybdenum oxide, after mixing evenly 100 parts ℃ drying for 1.5 hours, then smelting at 1100 ℃ for 1.2 hours, water quenching and ball milling with a planetary ball mill for 1 hour, passing through a 500-mesh sieve to obtain glass powder wit...

Embodiment 2

[0048] Aluminum powder: the average particle size of the aluminum powder used is 5.5, and the tap density is 1.59g / cm 3 .

[0049] Organic binder: 35 parts by mass of terpineol, 35 parts of butyl carbitol acetate, 20 parts of trimethylpentanediol isobutyrate, 1.5 parts of spar and 2 parts of pump oil,

[0050] Mix and add to the reaction kettle and heat to 80~100°C, then stir and add 3.5 parts of ethyl cellulose and 3 parts of phenolic resin, dissolve and filter to obtain a clear and transparent organic adhesive.

[0051] Glass powder: 10 parts by mass of boron oxide, 70 parts of bismuth oxide, 6 parts of silicon oxide, 6 parts of zinc oxide, 2 parts of aluminum oxide, 2 parts of zirconium oxide, 1 part of vanadium oxide and 3 parts of molybdenum oxide, 100 parts after mixing evenly ℃ drying for 1.5 hours, then smelting at 1100 ℃ for 1.2 hours, water quenching and ball milling with a planetary ball mill for 1 hour, passing through a 500-mesh sieve to obtain glass powder with ...

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Abstract

The invention relates to a high-photoelectric-conversion-efficiency crystalline silicon solar battery aluminum paste, which consists of the following raw materials by mass percent: 60-70 percent of aluminum powder, 20-35 percent of organic bond, 1-10 percent of aluminum-silicon alloy powder, 0.2-2 percent of glass powder and 0.1 to 1.5 percent of adjuvant, wherein the sum of the mass percent of the raw materials is 100 percent, the content of aluminum contained in the aluminum-silicon alloy powder is 8-15 percent and the average grain size of the aluminum-silicon alloy powder is small than 2mum. The invention additionally provides a preparation method for the crystalline silicon solar battery aluminum paste. After the paste is screen-printed, dried and sintered, an aluminum back surface field is formed on a silicon wafer. The adhesive force of the aluminum back surface field is high, the warping degree of cells is low, the photoelectric conversion efficiency is high, the cost is low and the aluminum paste is nontoxic.

Description

technical field [0001] The invention relates to an aluminum paste of a crystalline silicon solar cell with high photoelectric conversion efficiency and a preparation method thereof. The aluminum paste for solar cells is mainly used in the manufacture of crystalline silicon solar cells to form an aluminum back field BSF and improve the efficiency of the solar cells, and belongs to the technical field of electronic materials. Background technique [0002] With the development of human history, people consume more and more energy. People realize that traditional petrochemical energy will eventually be exhausted one day, and in reality the environmental pollution caused by traditional petrochemical energy is becoming more and more serious, which makes people have a soft spot for clean energy. As the cleanest, inexhaustible and inexhaustible energy, solar energy has been paid more and more attention to. The widespread use of solar water heaters has made people full of confidence...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 杨贵忠任进福许士燕
Owner JIANGSU HOYI TECH
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