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Universal back electrode silver paste for PERC single-sided and double-sided batteriesand preparation method thereof

A double-sided battery, back electrode technology, used in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problem of poor aging resistance of PERC back silver technology, affecting the reliability and use of components Life, the silver-aluminum lap joints pull off the powder and other problems, to achieve the effect of improving reliability and service life, high aging tensile force, and improving adhesion

Active Publication Date: 2020-07-10
HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing PERC back-silver technology uses a narrow process window, and the performance of the PERC single-sided battery is acceptable, but switching to the PERC double-sided battery will easily cause low tensile force and 3M tension at the silver-aluminum overlap. Taking off the powder, etc., affects the quality of the battery sheet, and the PERC back silver technology has poor aging resistance, which affects the reliability and service life of the component. To provide a common PERC single-sided double-sided battery, low corrosion, strong adhesion, Silver paste for the back electrode of PERC single-sided double-sided battery with high aging tensile force and strong aging resistance, which can reduce manufacturing and use costs

Method used

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  • Universal back electrode silver paste for PERC single-sided and double-sided batteriesand preparation method thereof
  • Universal back electrode silver paste for PERC single-sided and double-sided batteriesand preparation method thereof
  • Universal back electrode silver paste for PERC single-sided and double-sided batteriesand preparation method thereof

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Effect test

Embodiment 1

[0032] The universal back electrode silver paste for PERC single-sided and double-sided batteries provided in this embodiment comprises the following components in parts by weight: 10 parts of nano silver powder, 20 parts of spherical silver powder, 25 parts of microcrystalline silver powder, 2 parts of glass powder, and 42 parts of organic vehicle 1 part, 1 part of organic additives.

[0033] The organic vehicle includes the following components in parts by weight: 10 parts of Dow ethyl cellulose STD-100, 75 parts of Dow ethyl cellulose STD-75 parts, 45 parts of terpineol, 25 parts of butyl carbitol acetate, alcohol Ester twelve 15 parts.

[0034] The glass powder comprises the following components in parts by weight: Bi 2 o 3 44 copies, B 2 o 3 4 parts, SiO 2 20 copies, Al 2 o 3 2 parts, CuO 15 parts, MnO 2 6 parts, ZrO 2 2 copies, W 2 o 3 1 part, Na 2 CO 3 0.5 parts, ROx 5.5 parts.

[0035] The preparation method of the universal back electrode silver pa...

Embodiment 2

[0045] The universal back electrode silver paste for PERC single-sided and double-sided batteries provided in this embodiment comprises the following components in parts by weight: 6 parts of nano silver powder, 33 parts of spherical silver powder, 16 parts of microcrystalline silver powder, 2.5 parts of glass powder, and 40.5 parts of organic vehicle Parts, 2 parts of organic additives.

[0046] The organic vehicle includes the following components in parts by weight: Dow ethyl cellulose STD-2003 parts, STD-1008 parts, Dow ethyl cellulose STD-74 parts, terpineol 40 parts, butyl carbitol 10 parts Parts, 20 parts of butyl carbitol acetate, 15 parts of alcohol ester twelve.

[0047] The glass powder comprises the following components in parts by weight: Bi 2 o 3 35 copies, B 2 o 3 6 parts, SiO 2 23 parts, Al 2 o 3 2 parts, CuO 20 parts, MnO 2 3 parts, ZrO 2 0.5 parts, W 2 o 3 1 part, Na 2 CO 3 0.5 parts, ROx 9 parts.

[0048] The method for preparing the un...

Embodiment 3

[0055] The universal back electrode silver paste for PERC single-sided and double-sided batteries provided in this embodiment comprises the following components in parts by weight: 15 parts of nano silver powder, 10 parts of spherical silver powder, 30 parts of microcrystalline silver powder, 1 part of glass powder, and 43.5 parts of organic vehicle parts, 0.5 parts of organic additives.

[0056] The organic vehicle includes the following components in parts by weight: 12 parts of Dow ethyl cellulose STD-100, 72 parts of Dow ethyl cellulose STD-72, 40 parts of terpineol, 28 parts of butyl carbitol acetate, alcohol Ester twelve 18 parts.

[0057] The glass powder comprises the following components in parts by weight: Bi 2 o 3 46 copies, B 2 o 3 5 parts, SiO 2 15 copies, Al 2 o 3 2 parts, CuO 8 parts, MnO 2 8 parts, ZrO 2 2 copies, W 2 o 3 1.5 parts, Na 2 CO 3 0.5 parts, ROx 12 parts.

[0058] The preparation method of the PERC single-sided double-sided cel...

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Abstract

The invention relates to universal back electrode silver paste for crystalline silicon solar PERC single-sided and double-sided batteries and a preparation method thereof. The silver paste comprises the following components in parts by weight: 45-60 parts of silver powder, 0.5-3 parts of glass powder, 30-55 parts of an organic carrier and 0.5-2 parts of an organic auxiliary agent. The back silverpaste adopts a glass system containing rare earth elements, and experiments indicatethat introduction of the rare earth elements into the glass has two effects: on the one hand, cavities existing at silver-aluminum lap joints can be reduced, the silver-aluminum bonding compactness can be enhanced, the contact resistivity between silver and aluminum can be effectively reduced, compounding can be reduced, and the efficiency can be improved; on the other hand, the compactness and the structural strength of the silver layer are enhanced, and the adhesive force and the anti-aging performance are improved.

Description

technical field [0001] The invention belongs to the technical field of back electrode paste for crystalline silicon solar cells, and in particular relates to a common back electrode silver paste for PERC single-sided and double-sided batteries and a preparation method thereof. Background technique [0002] Efficiency improvement and cost reduction are the eternal themes of the photovoltaic industry. With the development of technology, the traditional aluminum back field single and polycrystalline cells are gradually reduced, and PERC technology has become the mainstream technology for efficient mass production in the crystalline silicon cell industry. [0003] PERC (passivated emitter and rear cell) batteries are divided into single-sided PERC batteries and double-sided PERC batteries. The core of efficiency improvement is to make a laminated passivation film (Al 2 o 3 +SiNx), in which AlOx is the main passivation film, and SiNx is the protective film to passivate the back ...

Claims

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Application Information

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IPC IPC(8): H01B1/16H01B13/00H01L31/0224
CPCH01B1/16H01B13/00H01L31/022425Y02E10/50
Inventor 陈卫龙庄舟杨华
Owner HANGZHOU RIGHTSILVER ELECTRONICS MATERIAL
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