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Lead-free glass powder for silver paste on back of crystalline silicon solar cell and preparation method thereof

A lead-free glass powder and solar cell technology, which is applied in the field of solar cells, can solve problems such as unstable solderability, poor adhesion between paste and silicon substrate, mismatch between expansion coefficient and silicon chip, and achieve The effect of lowering the softening point, improving the stability of the network structure, and reducing the expansion coefficient

Active Publication Date: 2013-07-10
JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The existing glass powder for lead-free solar cell silver paste on the market has an expansion coefficient that does not match that of the silicon wafer. When used in the paste, the adhesion between the paste and the silicon substrate is poor, the solderability is unstable, and the solder resistance, etc. Phenomenon

Method used

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  • Lead-free glass powder for silver paste on back of crystalline silicon solar cell and preparation method thereof
  • Lead-free glass powder for silver paste on back of crystalline silicon solar cell and preparation method thereof
  • Lead-free glass powder for silver paste on back of crystalline silicon solar cell and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of lead-free glass powder for silver paste on the back of crystalline silicon solar cell includes the following steps in sequence: (1) Prepare raw materials according to the following components and weight contents, Bi 2 O 3 : 40 servings, B 2 O 3 : 5 parts, ZrO 2 : 0.5 part, SiO 2 : 10 parts, ZnO: 5 parts, TiO 2 : 1 part, Al 2 O 3 : 5 servings, P 2 O 5 : 1 part (2) Put the above components into the mixer, and mix them evenly to form a mixture; (3) Preheat the quartz crucible to 600°C, put the above mixture into the quartz crucible, and keep the temperature at 600°C for a period of time 20min; then place the quartz crucible in a muffle furnace and smelt at 900°C for 20min; (4) pour the smelted glass into deionized water for quenching; (5) wet the quenched glass to 2μm, After drying, lead-free glass powder is obtained.

[0021] Take a small amount of prepared glass powder samples and test the softening point, expansion coefficient and par...

Embodiment 2

[0025] The preparation method of lead-free glass powder for silver paste on the back of crystalline silicon solar cell includes the following steps in sequence: (1) Prepare raw materials according to the following components and weight contents, Bi 2 O 3 : 55 servings, B 2 O 3 : 10 parts, ZrO 2 : 2 parts, SiO 2 : 15 parts, ZnO: 12 parts, TiO 2 : 3 parts, Al 2 O 3 : 13 servings, P 2 O 5 : 1 part; (2) Put the above components into the mixer, and mix them uniformly to form a mixture; (3) Preheat the quartz crucible to 700 ° C, put the above mixture into the quartz crucible, and keep the temperature at 700 ° C. time 20min; then put the quartz crucible in a muffle furnace and smelt at 1150℃ for 30min; (4) pour the smelted glass into deionized water for quenching; (5) wet the quenched glass to 4μm , lead-free glass powder is obtained after drying.

[0026] Take a small amount of prepared glass powder samples and test the softening point, expansion coefficient and particle ...

Embodiment 3

[0030] The preparation method of lead-free glass powder for silver paste on the back of crystalline silicon solar cell includes the following steps in sequence: (1) Prepare raw materials according to the following components and weight contents, Bi 2 O 3 : 70 servings, B 2 O 3 : 15 parts, ZrO 2 : 5 parts, SiO 2 : 20 parts, ZnO: 20 parts, TiO 2 : 5 parts, Al 2 O 3 : 20 servings, P 2 O 5 : 1 part; (2) Put the above components into the mixer, and mix them evenly to form a mixture; (3) Preheat the quartz crucible to 800 ° C, put the above mixture into the quartz crucible, and keep the temperature at 800 ° C. time 20min; then put the quartz crucible in a muffle furnace and smelt at 1200℃ for 40min; (4) pour the smelted glass into deionized water for quenching; (5) wet ball mill the quenched glass to 5μm , lead-free glass powder is obtained after drying.

[0031] Take a small amount of prepared glass powder samples and test the softening point, expansion coefficient and pa...

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Abstract

The invention relates to a lead-free glass powder for silver paste on the back of a crystalline silicon solar cell and a preparation method thereof. The lead-free glass powder comprises the following raw materials in parts by weight: 40-70 parts of Bi2O3, 5-15 parts of B2O3, 0.5-5 parts of ZrO2, 10-20 parts of SiO2, 5-20 parts of ZnO, 1-5 parts of TiO2, 5-20 parts of Al2O3 and 1 part of P2O5. The preparation method comprises the following steps of: placing the raw materials in a mixer, and uniformly mixing to form a mixture; preheating a quartz crucible to 600-800 DEG C, placing the mixture in the quartz crucible and carrying out heat preservation for 20 minutes; then smelting for 20 minutes to 40 minutes at 900-1200 DEG C; pouring molten glass into deionized water for quenching, carrying out wet-process ball milling on the quenched glass to 2-5mu m, and drying to obtain the lead-free glass powder. The lead-free glass powder has the advantages that the technological process is simple, time consumption for smelting is short and cost is low; when in use, the lead-free glass powder has good wettability with silver powder and a silicon substrate; and after the lead-free glass powder is sintered, the adhesive force between the lead-free glass powder and the silicon substrate is above 5N.

Description

technical field [0001] The invention relates to an electronic paste for crystalline silicon solar cells, in particular to a lead-free glass powder for silver paste on the back of crystalline silicon solar cells, and a preparation method for lead-free glass powder for silver paste on the back of crystalline silicon solar cells , belonging to the technical field of solar cells. Background technique [0002] As a green and inexhaustible new energy source, solar energy has developed rapidly under the vigorous promotion of various countries around the world. At present, crystalline silicon solar cells dominate the market, occupying the most important solar cell market. [0003] In the production process of the crystalline silicon solar cell, the silver conductive paste is printed on the back of the silicon wafer, and the solar cell modules are connected in series or in parallel by welding the backside silver paste with the ribbon. [0004] The silver paste is mainly composed of...

Claims

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Application Information

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IPC IPC(8): C03C12/00
Inventor 冷青松
Owner JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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