Silicon solar cell rear silver paste with low silver content and preparation method therefor

A technology of solar cells and silver content, which is applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of unstable long-term use performance, poor aging resistance, and limited reduction of silver content, and achieves a simple and easy preparation process , strong adhesion, and the effect of reducing silver content

Active Publication Date: 2015-09-23
DONGFANG TURBINE CO LTD
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, there are many problems in the existing silver paste technology for the back of crystalline silicon solar cells with low silver content. The reduction of silver content is limited.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicon solar cell rear silver paste with low silver content and preparation method therefor
  • Silicon solar cell rear silver paste with low silver content and preparation method therefor
  • Silicon solar cell rear silver paste with low silver content and preparation method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] The present invention will be described in detail below through specific examples. The contents of each example are only used for understanding the present invention, and should not be construed as limiting the protection scope of the present invention.

[0037] Using the raw materials, ratios, and process conditions shown in Table 1, the silver paste on the back of the crystalline silicon solar cell with low silver content was prepared.

[0038] Table 1 Raw materials and process conditions used in Examples 1-5 of the present invention

[0039]

[0040]

[0041] The detailed steps for preparing the silver paste on the back of the crystalline silicon solar cell with low silver content are as follows:

[0042] 1).Preparation of anti-aging inorganic adhesive

[0043]According to the raw materials and proportions shown in Table 1, mix the raw materials evenly and put them into the platinum crucible, heat the platinum crucible with a high-temperature furnace, and keep...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses silicon solar cell rear silver paste with low silver content and a preparation method therefor. The rear silver paste is prepared from the following raw materials in percentage by weight: sheet-shaped silver powder, spherical sliver powder, an anti-ageing inorganic binder, an organic carrier and an additive. The preparation method comprises: 1) preparing the anti-ageing inorganic binder; 2) preparing the organic carrier; 3) preparing rear sliver paste: weighing raw materials in a formula ratio; mixing two kinds of sliver powder and the anti-ageing inorganic binder to obtain a powder mixture; adding the powder mixture, the organic carrier and the additive into a a double-planet stirrer to mix, thereby obtaining a slurry mixture; and grinding the slurry by a three-roller grinding machine, controlling the slurry fineness to be lower than 20 microns and controlling the slurry viscosity to be 25-40pa.s; and 4) carrying out vacuum defoaming, thereby obtaining the rear sliver paste product. The rear sliver paste has extremely low silver paste, and is low in cost; and a formed rear sliver electrode has characteristics of good weldability and welding resistance, high adhesion, excellent ageing resistance, capacity of forming good ohm contact with a silicon substrate, and the like.

Description

technical field [0001] The invention relates to a back silver paste, in particular to a back silver paste of a crystalline silicon solar cell, and a preparation method of the back silver paste. Background technique [0002] A solar cell is a semiconductor device that converts light energy into electrical energy. The generated electrical energy can be conducted through the metallized electrodes formed by sintering the solar cell electronic paste. The silver paste on the back of the solar cell is the main component of the electronic paste of the solar cell. It is mainly used to make the back electrode in the production process of the solar cell, and collect and export the current collected by the aluminum back field. [0003] The silver paste on the back of the solar cell is mainly composed of silver powder, organic solvent, inorganic binder and additives. As the functional phase in the paste, the silver powder mainly plays the role of conductivity. In the production process...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 朱健苟鹏飞李丹丹卢毅崔隆宇钟连兵肖毅
Owner DONGFANG TURBINE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap