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Aluminum pulp composition of crystal silicon solar cell and preparation method thereof

A technology of solar cells and crystalline silicon, which is applied in circuits, electrical components, semiconductor devices, etc., can solve the problem that the photoelectric conversion efficiency cannot meet the requirements of solar cell development, reduce the cost of aluminum paste for crystalline silicon solar cells, and single crystal silicon solar cell silicon High sheet warpage and other problems, to achieve the effect of easy quality control, strong bonding, and improved rheological properties

Inactive Publication Date: 2011-07-20
LUOYANG SHENJIA ELECTRONICS CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But PbO-B 2 o 3 -SiO 2 The glass is not allowed because it contains the toxic substance PbO, Bi 2 o 3 -B 2 o 3 -SiO 2 Due to the high cost of glass, it is not conducive to further reducing the cost of aluminum paste for crystalline silicon solar cells
Chinese patent CN100446277C discloses a composition and preparation method of a silicon solar cell back field aluminum conductive paste, the aluminum conductive paste is composed of 70-80% aluminum powder by mass percentage, 15-30% modified organic adhesive, 40- It is prepared by mixing 60% inorganic binder and 1-10% glass metal powder as raw materials. The warpage of silicon wafers for monocrystalline silicon solar cells prepared by this method is 0.50-0.80mm, and the photoelectric conversion efficiency is as high as 17.08%. Its aluminum film is smooth and has no aluminum beads; however, the preparation process of its inorganic adhesive is relatively complicated, and the warpage of the silicon wafer of monocrystalline silicon solar cells is still high, and the photoelectric conversion efficiency cannot meet the requirements of further development of solar cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Preparation of organic vehicle

[0025] According to mass percentage, ethyl cellulose EK-100 5.0%, epoxy resin 2.0%, castor oil 5%, ethylene glycol phenyl ether 2%, dibutyl phthalate 15%, lecithin 1.0%, furoic acid 0.5%, stearic acid 2.0%, diethyl phthalate 2.5%, terpineol 60%, turpentine 5%, the total amount is 100%; the above substances are mixed and heated in a stainless steel container at 75-96°C in a water bath until the solid resin is completely dissolved to obtain a clear, transparent and uniform organic vehicle.

[0026] 2. Preparation of lead-free glass adhesive powder

[0027] According to mass percentage, it is composed of 16% boron trioxide, 19% silicon dioxide, 32% barium oxide, 18% aluminum oxide and 15% calcium oxide, the total amount is 100%; plus 1% vanadium pentoxide , mix evenly with a double-roller ball mill, put it into a quartz crucible, put it into a program-controlled glass melting furnace, heat it to 1220°C, keep it warm and melt for 1.5h, ...

Embodiment 2

[0036] 1. Preparation of organic vehicle

[0037] According to mass percentage, ethyl cellulose EK-100 5.0%, epoxy resin 2.0%, castor oil 5%, ethylene glycol phenyl ether 1.0%, dibutyl phthalate 18.5%, lecithin 1.0%, o-phthalate Diethyl diformate 2.5%, terpineol 60%, turpentine 5%, the total amount is 100%; the above substances are mixed and heated in a water bath at 75-96°C in a stainless steel container until the solid resin is completely dissolved and a clear and transparent Uniform organic carrier.

[0038] 2. Preparation of lead-free glass adhesive powder

[0039] According to mass percentage, it is composed of 18% boron trioxide, 17% silicon dioxide, 34% barium oxide, 16% aluminum oxide and 15% calcium oxide, the total amount is 100%; plus 2% vanadium pentoxide , melting method is the same as embodiment 1;

[0040] 3, metal aluminum powder: specification is the same as embodiment 1;

[0041] 4. Metal or non-metal powder additive: boron powder with an average particle...

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Abstract

The invention discloses an aluminum pulp composition of a crystal silicon solar cell and a preparation method thereof, wherein an aluminum pulp is prepared by the following compositions in percentage by weight: 50-85 percent of spherical aluminum powder, 2-15 percent of lead-free glass adhesive, 10-35 percent of organic carrier and 0.5-6 percent of metal / nonmetal power additive. The prepared aluminum pulp is used for a single crystal silicon solar cell, can enable warpage of a silicon wafer to be small, and aluminum films are dense and uniform, have no aluminum pills, do not bulb and have strong adhesion force and high photoelectric conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of aluminum paste for batteries, and in particular relates to a composition of aluminum paste for crystalline silicon solar cells and a preparation method thereof. Background technique [0002] Polycrystalline silicon and monocrystalline silicon solar cells are an important branch of the solar photovoltaic industry. As an inexhaustible green and environmentally friendly renewable energy, silicon solar cells have developed rapidly at home and abroad. Aluminum paste (aluminum conductive paste) is used for Fabrication of the electric field on the back of a crystalline silicon solar cell. At present, in order to further reduce the manufacturing cost and market price of solar cells, thereby narrowing the cost gap between solar cell power generation and fossil energy power generation, the size of silicon wafers has been gradually developed from 125×125mm or 156×156mm, and the thickness has gradually changed from 2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0224H01L31/18H01B1/16H01B1/22
CPCY02P70/50
Inventor 郝晓光周世平白晓华
Owner LUOYANG SHENJIA ELECTRONICS CERAMICS
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