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Binding agent, organic carrier, front conductive silver paste, preparation method of front conductive silver paste and solar cell

A technology of conductive silver paste and organic carrier, which is applied in the field of solar cells to achieve excellent moisture retention, excellent linear flatness, and improved compatibility

Active Publication Date: 2021-09-17
西安宏星电子浆料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor printability of the front conductive silver paste of crystalline silicon solar cells on a narrow line width opening screen, the present invention provides a binder, an organic carrier, a front conductive silver paste and a preparation method thereof, and solar cells, which are applied to super Front side conductive silver paste for fine line screen printing to solve the problem of continuous printing for a long time

Method used

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  • Binding agent, organic carrier, front conductive silver paste, preparation method of front conductive silver paste and solar cell
  • Binding agent, organic carrier, front conductive silver paste, preparation method of front conductive silver paste and solar cell
  • Binding agent, organic carrier, front conductive silver paste, preparation method of front conductive silver paste and solar cell

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preparation example Construction

[0096] Such as figure 1 Shown, the 4th object of the present invention is to provide a kind of preparation method of solar cell positive conductive silver paste, comprising:

[0097] Preparation of a paste glass intermediate: mixing glass powder and the first organic carrier V1 in a certain proportion, grinding and dispersing, to prepare a paste glass intermediate.

[0098] The paste glass intermediate, the first silver powder P1, the second silver powder P2, the second organic vehicle V2, organic additives, etc. are mixed and stirred according to the proportion, and the front silver paste is obtained by grinding, dispersing and filtering.

[0099] Preferably, grinding and dispersing are performed by a three-roll machine for multiple times until the fineness of the front conductive silver paste is less than 5 μm and the viscosity is 70-90 pa.s. For example, the fineness of the front conductive silver paste is 4 μm, and the viscosity is 80 pa.s.

[0100] The invention uses th...

Embodiment 1

[0106] A high-efficiency solar cell front conductive silver paste suitable for ultra-fine line printing. The composition of the silver paste includes: 51wt% P1 silver powder; 38wt% P2 silver powder; 2.3wt% glass powder; 4.1wt% first organic vehicle V1; 3.6 wt% of the second organic vehicle V2; 1 wt% of organic additives.

[0107] In the specific embodiment, the raw material ratio of the first organic carrier V1 is: polyvinyl butyral (PVB) 2.2wt%, copolymerized modified PVP resin 3.7wt%, cellulose acetate butyrate (CAB) 1.4wt%, modified 1.5wt% non-toxic acrylic resin, 28wt% butyl carbitol, 48.2wt% butyl carbitol acetate, 7.5wt% propylene glycol butyl ether, 7.5wt% alcohol ester twelve.

[0108] In the specific embodiment, the raw material ratio of the second organic carrier V2 is: 4.2wt% of polyamide wax, 3.5wt% of polyalphamethylstyrene, 32.3wt% of butyl carbitol acetate, 50wt% of tripropylene glycol methyl ether, Dimethyl adipate 10wt%.

[0109] In the specific embodiment, ...

Embodiment 2

[0113] A high-efficiency solar cell front conductive silver paste suitable for ultra-fine line printing. The composition of the silver paste includes: 51wt% P1 silver powder; 38wt% P2 silver powder; 2.3wt% glass powder; 5.1wt% first organic vehicle V1; 2.6 wt% of the second organic vehicle V2; 1 wt% of organic additives.

[0114] In the specific embodiment, the raw material ratio of the first organic carrier V1 is: polyvinyl butyral (PVB) 2.2wt%, copolymerized modified PVP resin 3.7wt%, cellulose acetate butyrate (CAB) 1.4wt%, modified 1.5wt% non-toxic acrylic resin, 28wt% butyl carbitol, 48.2wt% butyl carbitol acetate, 7.5wt% propylene glycol butyl ether, 7.5wt% alcohol ester twelve.

[0115] In the specific embodiment, the raw material ratio of the second organic carrier V2 is: 4.2wt% of polyamide wax, 3.5wt% of polyalphamethylstyrene, 32.3wt% of butyl carbitol acetate, 50wt% of tripropylene glycol methyl ether, Dimethyl adipate 10wt%.

[0116] The preparation method of th...

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Abstract

The invention relates to a binding agent, an organic carrier, a front conductive silver paste, a preparation method of the front conductive silver paste and a solar cell. The binding agent is a vinylpyrrolidone / vinyl caprolactam / dimethylaminoethyl methacrylate terpolymer. The terpolymer has excellent moisture retention, flexibility and affinity, can improve the compatibility with various resins, and has the film-forming property and the shaping effect of PVP. The preparation method comprises the following steps: preparing an organic carrier from the terpolymer, pretreating glass powder in the formula to prepare a pasty intermediate, stirring and mixing the pasty intermediate with silver powder, the organic carrier, an organic additive and the like, and grinding and dispersing to obtain the front conductive silver paste. The modified resin is used for preparing the organic carrier to be applied to the solar front conductive silver paste, the solar front conductive silver paste can adapt to superfine line opening screen printing, the linear flatness is excellent, the height-width ratio is excellent, and the photoelectric conversion efficiency is improved. And the problem of long-term printability of the front conductive silver paste is effectively solved.

Description

technical field [0001] The invention belongs to the field of electronic paste, and in particular relates to a binder, an organic carrier, a front conductive silver paste, a preparation method thereof, and a solar cell. Background technique [0002] With the depletion of non-renewable energy sources such as coal, oil, and natural gas, human demand for energy continues to grow, and the development of new renewable energy sources is an important way for human beings to meet energy needs. As the greenest and cleanest renewable energy, solar photovoltaic has entered the rapid development channel. As a new energy technology with the fastest development speed, the lowest cost and the highest degree of industrialization, crystalline silicon solar cells have become the absolute mainstream of solar energy utilization and development. The front conductive silver paste is the most important component of crystalline silicon solar cells, which plays a vital role in improving the photoele...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B1/16H01B13/00H01L31/0224C08F226/06C08F220/34C08F226/10
CPCH01B1/22H01B1/16H01B13/00H01L31/022425C08F226/06C08F220/34C08F226/10Y02E10/50
Inventor 黄超锋赵科良任军刚党丽萍沈远征张亚鹏寇航周刘琦瑾
Owner 西安宏星电子浆料科技股份有限公司
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