Superfine lead-free glass powder for electrode slurry of solar battery, and preparation method thereof

A technology for solar cells and lead-free glass powder, which is applied in the field of preparation of ultrafine lead-free glass powder for conductive silver paste on front electrodes of solar cells, can solve the problem of high softening temperature of glass components, large energy consumption, and glass powder particle size. big problem

Inactive Publication Date: 2014-12-03
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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Problems solved by technology

[0005] The technical problem solved by the present invention is aimed at the problems of high softening temperature of the glass component in the current silicon-based photovoltaic electrode paste, large particle size of glass powder, and large energy consumption in the preparation process. The present invention prepares photovoltaic paste by

Method used

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example 5

[0038] A preparation method of low-lead glass powder for solar battery electrode silver paste, comprising the following steps:

[0039] (1) The raw material composition mass percentage of low-lead glass powder for electrode silver paste of a kind of crystalline silicon solar cell is as follows:

[0040] SiO 2 10%%, Bi 2 o 3 55%, B 2 o 3 15%, ZnO 15%, Sb 2 o 3 2%, ZrO2 3%

[0041] (2) Add 43% by mass of C pore-forming agent to the lead-free glass mixture selected in step (2).

[0042] (3) Melt the lead-free glass mixture in step (2) with a crucible in a muffle furnace at a temperature of 1100°C and a holding time of 20 minutes.

[0043] (4) Quenching the molten glass in step (3) into a small porous glass block of 1-2 cm in deionized water.

[0044] (5) The porous glass block in step (4) is subjected to wet planetary ball milling on the porous lead-free glass with 4-15 mm balls, using anhydrous ethanol and water as the ball milling medium, the ball milling time is 1...

example 6

[0048] A preparation method of low-lead glass powder for solar battery electrode silver paste, comprising the following steps:

[0049] (1) The raw material composition mass percentage of low-lead glass powder for electrode silver paste of a crystalline silicon solar cell is as follows:

[0050] SiO 2 20%%, Bi 2 o 3 65%, B 2 o 3 5%, ZnO 7%, Sb 2 o 3 2%, ZrO 2 1%

[0051] (2) Add 45% mass fraction of polystyrene pore-forming agent to the lead-free glass mixture selected in step (1).

[0052] (3) Melt the lead-free glass mixture in step (2) with a crucible in a muffle furnace at a temperature of 1300°C and a holding time of 10 minutes.

[0053] (4) Quenching the molten glass in step (3) into a small porous glass block of 1-2 cm in deionized water.

[0054] (5) The porous glass block in step (4) is subjected to wet planetary ball milling on the porous lead-free glass with 4-15 mm balls, using anhydrous ethanol and water as the ball milling medium, the ball milling ...

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Abstract

The invention discloses superfine lead-free glass powder for the electrode slurry of a solar battery and a preparation method thereof. Lead-free glass comprises 20% to 30% of SiO2, 40% to 70% of Bi2O3, 2% to 15% of B2O3, 1% to 10% of Sb2O3, 1 to 3% of ZnO and 1 to 3% of ZrO2. The preparation method comprises the following steps: (1) weighing of a mixture according to the above-mentioned proportion and addition of a pore forming agent (C and PVA); (2) melting of the mixture; (3) water quenching; and (4) planetary ball milling (sieving). The superfine glass powder is prepared through ball milling of environment-friendly lead-free porous glass powder by using this method; and compared with conventional products, the prepared lead-free superfine glass powder has the advantages of short ball milling time, low energy consumption, a small particle size and high activity. A high photoelectric conversion rate is obtained when the lead-free superfine glass powder is used for photovoltaic positive electrode slurry; after electrode silver slurry is sintered, low volume resistance is obtained, bonding strength between an electrode silver layer and Si is improved, and sintering temperature of silver slurry is reduced.

Description

technical field [0001] The invention relates to the technical field of preparation of lead-free glass powder, in particular to a preparation method of ultrafine lead-free glass powder for the conductive silver paste of the front electrode of a solar cell. Background technique [0002] Solar energy is a green, non-polluting, inexhaustible energy source, and people pay attention to these advantages. A crystalline silicon solar cell is a semiconductor device that can convert solar energy into electrical energy. It converts solar energy into electrical energy under the condition of light, and collects and transmits the current through grid lines and electrodes. The surface electrodes and grid lines of crystalline silicon solar cells are made of conductive silver paste through high-speed and high-precision screen printing, low-temperature drying, and high-temperature sintering. The conductive silver paste is usually prepared from silver powder, glass powder and organic vehicle. ...

Claims

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Application Information

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IPC IPC(8): C03C12/00C03C8/24
Inventor 赵军陈义祥琚伟
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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