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A kind of back passivation aluminum paste containing porous structure powder and preparation method thereof

A technology of porous structure and back passivation, applied in cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, semiconductor devices, etc., can solve problems such as poor appearance and LBSF not involved, and achieve good flux adhesion Junction effect, less damage, and the effect of improving photoelectric conversion efficiency

Active Publication Date: 2019-09-20
JIANGSU HOYI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above patents may have improved certain performances and each has its own characteristics, it does not deal with the problem of poor appearance or LBSF

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A back passivation aluminum paste for PERC battery containing porous structure powder, said aluminum paste is composed of the following components in parts by weight: 65 parts of aluminum powder, 25 parts of organic carrier, 5 parts of glass powder, and 0.1 part of porous structure powder , 4.9 parts of organic additives.

[0028] The aluminum powder: the aluminum powder with a particle size of 2-4 μm accounts for 20 parts, and the aluminum powder with a particle size of 7-9 μm accounts for 45 parts.

[0029] The organic vehicle is composed of the following materials: 5 parts of ethyl cellulose, 3 parts of acrylic resin, 30 parts of alcohol ester dodeca, 19 parts of terpineol, and 43 parts of butyl carbitol.

[0030] The porous structure powder is aluminosilicate.

[0031] The organic auxiliary agent uses lecithin.

[0032] The preparation method of described aluminum paste:

[0033] (1) Preparation of organic vehicle: weigh and mix the above solvent and resin, heat ...

Embodiment 2

[0037] A back passivation aluminum paste for PERC batteries containing porous structure powder, the aluminum paste is composed of the following components in parts by weight: 80 parts of aluminum powder, 17.3 parts of organic carrier, 1.67 parts of glass powder, and 0.03 parts of porous structure powder , 1 part of organic auxiliary agent.

[0038] The aluminum powder: spherical aluminum powder with a particle diameter of 6-7 μm.

[0039] The organic vehicle is composed of the following materials: 3 parts of ethyl cellulose, 6 parts of acrylic resin, 3 parts of modified polyimide thixotropic agent, 30 parts of alcohol ester twelve, 6 parts of methyl nylon acid, 52 parts Butyl Carbitol.

[0040] The porous structure powder is aluminophosphate.

[0041] The organic additive uses Span 85.

[0042] The preparation method of described aluminum paste:

[0043] (1) Preparation of organic vehicle: weigh and mix the above solvent and resin, heat up to 80° C., and stir at 3000 rpm f...

Embodiment 3

[0048] A back passivation aluminum paste for PERC battery containing porous structure powder, said aluminum paste is composed of the following components in parts by weight: 76 parts of aluminum powder, 18.5 parts of organic carrier, 1.5 parts of glass powder, and 1 part of porous structure powder , 3 parts of organic additives.

[0049] Aluminum powder: 57 parts of spherical aluminum powder with a particle size of 7-8 μm, 17 parts of spherical aluminum powder of 4-5um, and 2 parts of spherical aluminum powder of 1-2um.

[0050] Organic carrier: specification is the same as embodiment 2.

[0051] Porous structure powder: specification is the same as embodiment 2.

[0052] Organic auxiliary agent: specification is the same as embodiment 2.

[0053] The preparation method of the rear passivation aluminum paste for PERC battery is the same as that in Example 2.

[0054] The aluminum paste prepared in the above examples was screen-printed with a 400-mesh screen on a single-crys...

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Abstract

The invention discloses a back passivation aluminium slurry containing porous structure powders and a preparation method thereof, and belongs to the solar energy cell back surface field aluminium slurry field; the back passivation aluminium slurry comprises 65-80% of aluminium powders, 15-25% of an organic carrier, 1-5% of glass powders, 0.01-0.5% of porous structure powders, and 0.01-5% of an organic auxiliary agent. The back passivation aluminium slurry is good in printing property, small in passivation layer damages, can form excellent ohmic contact in a laser grooving portion, thus reducing the series resistance; a LBSF with an even, proper and continuous thickness is provided, thus improving the photoelectric conversion efficiency, and preventing appearance adverse phenomenon.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency solar cells, and in particular relates to a back passivation aluminum paste for batteries and a preparation method thereof. Background technique [0002] In order to achieve the ultimate goal of photovoltaic power grid parity, solar cell manufacturers and related scientific research institutions have developed a variety of high-efficiency battery technologies, among which PERC (Passivated Emitter and Rear Cell) battery technology is the most shining, and it has achieved rapid development in 2017. It is expected to In 2020, PERC solar cell shipments can account for 50% of the Chinese market. The biggest difference between PERC batteries and conventional batteries is that the dielectric film on the back surface is passivated, and local metal contacts are used to effectively reduce the electron recombination speed on the back surface and improve the light reflection on the back surface. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022441Y02E10/50
Inventor 陈志鹏王茂姜凯莉刘伟龙
Owner JIANGSU HOYI TECH
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