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Aluminium conductive paste for solar energy battery and preparation method thereof

A technology of solar cells and conductive paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. The effect of increasing the factor and not easily slipping through the net

Active Publication Date: 2012-09-05
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The immediate problem to be solved by the present invention is that in the prior art, the conductive paste for solar cells is prone to leakage and poor storage performance during screen printing, and a new type of aluminum conductive paste for solar cells is specially provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This example is used to illustrate the solar cell conductive paste disclosed in the present invention and its preparation method.

[0032] Step 1: Configuration of organic carrier

[0033] Based on the total weight of the organic vehicle to be prepared, get 30 parts by weight of terpineol, 54 parts by weight of dibutyl phthalate (DBP), mix uniformly, dissolve 16 parts by weight of ethyl cellulose In the above-mentioned mixed solvent, heat to 70°C to fully dissolve it, and stir evenly to obtain a uniform and clear organic vehicle A1.

[0034] Step 2: Preparation of Inorganic Binder

[0035] Get 68 parts by weight of bismuth oxide, 17 parts by weight of diboron trioxide, 7 parts by weight of silicon dioxide, 6 parts by weight of zinc oxide, and 2 parts by weight of aluminum oxide, join in a high-speed V-shaped mixer and mix for 20min, until uniform, an inorganic binder composed of oxide mixture powder is obtained.

[0036] Step 3: Preparation of solar cell conductive p...

Embodiment 2

[0040] This example is used to illustrate the solar cell conductive paste disclosed in the present invention and its preparation method.

[0041] Step 1: Configuration of organic carrier

[0042] Same as Example 1.

[0043] Step 2: Preparation of Inorganic Binder

[0044] Put the oxide mixture obtained in Step 2 of Example 1 into a porcelain crucible, put it into a silicon carbide rod furnace, heat it up to 500°C and keep it for 0.5 hours, then raise it to 1250°C, melt for 1 hour, water quench, and dry When the water content is less than 8%, use a crushing machine to crush it to 150 μm, and then put it into a ball mill tank to control the quality of the zirconia balls: material: deionized water = 2:1:0.5, tank speed 100 rpm, ball mill for 48 hours , filtered, and dried to obtain particle size D 50 It is a glass powder of about 2.5 microns.

[0045] Step 3: Preparation of solar cell conductive paste

[0046] Based on the total weight of the solar cell conductive paste requ...

Embodiment 3

[0049] This example is used to illustrate the solar cell conductive paste disclosed in the present invention and its preparation method.

[0050] Step 1: Configuration of organic carrier

[0051] Same as Example 1.

[0052] Step 2: Preparation of Inorganic Binder

[0053] Get 60 parts by weight of lead oxide, 25 parts by weight of boron trioxide, 5 parts by weight of silicon dioxide, 3 parts by weight of zinc oxide, 4 parts by weight of strontium oxide, 2 parts by weight of calcium oxide, 1 part by weight of Aluminum oxide was added to a high-speed V-type mixer and mixed for 20 minutes until uniform to obtain inorganic binder powder.

[0054] Step 3: Preparation of solar cell conductive paste

[0055] Based on the total weight of the solar cell conductive paste to be prepared, take 25 parts by weight of organic carrier A1 and place it in the stainless steel tank of the high-speed disperser, add 8.0 parts by weight of inorganic binder powder and 5.0 parts by weight under sti...

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PUM

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Abstract

The invention discloses an aluminium conductive paste for a solar energy battery and a preparation method thereof. The paste comprises the following components: aluminium powder, an inorganic binder, an organic carrier, and a metal additive. The metal powder additive has the median particle diameter D50 of 10 to 150 nm, and is one or more of magnesium powder, beryllium powder and lithium powder. The aluminium conductive paste prepared has high storage stability, is difficult to settle and agglomerate, and does not easily slip through a screen in the screen printing process; after the paste isprinted on the surface of the crystal silicon solar energy battery and sintered, the series resistance of the battery is reduced greatly, and the filling factor is increased; and the average photoelectric conversion efficiency of the monocrystalline silicon solar battery plate is over 17.60 percent.

Description

【Technical field】 [0001] The invention relates to a raw material for solar cells, more particularly to an aluminum conductive paste for crystalline silicon solar cells and a preparation method thereof. 【Background technique】 [0002] Crystalline silicon solar cells are an inexhaustible green and environmentally friendly renewable energy, and the current international research is very active. Aluminum conductive paste is one of the electronic information materials, and it is also the main auxiliary material for making crystalline silicon solar cells. As the low-cost refining process of crystalline silicon materials becomes more mature, conductive paste occupies more and more of the cost of solar cell materials. The greater the specific gravity. The production and sintering process of aluminum paste have a great influence on its performance. [0003] Aluminum paste is mainly composed of functional powder (aluminum powder), organic carrier and bonding component that acts as a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/18H01B1/22H01B13/00
CPCY02P70/50
Inventor 谭伟华
Owner BYD CO LTD
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