Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Solar cell conductive slurry and preparation method thereof

A technology of solar cells and conductive paste, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials, and can solve problems such as leakage.

Active Publication Date: 2010-12-01
BYD CO LTD
View PDF0 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem in the prior art that the back field aluminum conductive paste is easy to leak on the screen, the present invention provides a solar cell conductive paste, which can exist stably on the screen without causing the problem of screen leakage , and will not produce sedimentation and agglomeration during long-term storage

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
  • Solar cell conductive slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The invention also discloses a preparation method of the solar battery conductive paste, comprising: mixing the above-mentioned primary aluminum powder, secondary aluminum powder, glass powder and an organic carrier, and ball milling.

[0027] Preferably, the specific steps can be as follows: first mix the primary aluminum powder and secondary aluminum powder to obtain mixed aluminum powder; then mix the mixed aluminum powder with glass powder and organic carrier, and ball mill.

[0028] More specifically, the above-mentioned mixing of the mixed aluminum powder, glass powder and organic carrier is as follows: the organic carrier is placed in the stainless steel tank of the high-speed disperser, and the glass powder is added while stirring, and stirred well; then the mixed aluminum powder is divided into 2- 3 times into the mixture of glass powder and organic vehicle. Stir well after each addition, and then add the next time; after all the addition, stir well at high spe...

Embodiment 1

[0033] This example is used to illustrate the solar cell conductive paste disclosed in the present invention and its preparation method.

[0034] 1. Configuration of organic carrier

[0035] Based on the total weight of the organic vehicle to be prepared, get 39 parts by weight of terpineol, 45 parts by weight of dibutyl phthalate (DBP), mix uniformly, and dissolve 16 parts by weight of ethyl cellulose In the above mixed solvent, heat to 45°C to fully dissolve it, and stir evenly to obtain a uniform and clear organic vehicle A1.

[0036] 2. Preparation of solar cell conductive paste

[0037] Taking the total weight of the solar cell conductive paste required to be prepared as a benchmark, get 30 parts by weight of the organic carrier A1 and place it in the stainless steel tank of the high-speed disperser, add 4 parts by weight of glass powder (Southern Foshan, Guangdong) under the condition of stirring Glass powder produced by Glaze Co., Ltd., median particle size D 50 5um,...

Embodiment 2

[0041] This example is used to illustrate the solar cell conductive paste disclosed in the present invention and its preparation method.

[0042] 1. Configuration of organic carrier

[0043] Based on the total weight of the organic vehicle to be prepared, 42 parts by weight of butyl carbitol and 40 parts by weight of butyl glycol ether are mixed uniformly, and 12 parts by weight of ethyl cellulose, 6 parts by weight of P-tert-butylphenol formaldehyde resin (2402 resin produced by Shanghai Nanda Chemical Factory) was dissolved in the above mixed solvent, heated to 45° C. to fully dissolve, and stirred evenly to obtain a uniform and clear organic carrier A2.

[0044] 2. Preparation of solar cell conductive paste

[0045] Based on the total weight of the solar cell conductive paste required to be prepared, get 20 parts by weight of the organic carrier A2 and place it in the stainless steel tank of the high-speed disperser, and add 10 parts by weight of glass powder (Southern Fos...

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
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of solar cells and particularly discloses solar cell conductive slurry and a preparation method thereof. The solar cell conductive slurry comprises first-level aluminum powder, second-level aluminum powder, glass powder and an organic carrier, wherein the median particle diameter D50 of the first-level aluminum powder is between 2 and 8 mu m; and the median particle diameter D50 of the second-level aluminum powder is between 20 and 100 nanometers. The conductive slurry does not escape from a screen during screen printing, has high storage stability and is not easy to settle or agglomerate.

Description

【Technical field】 [0001] The invention relates to a solar cell conductive paste and a preparation method thereof, in particular to a solar cell back field aluminum paste and a preparation method thereof. 【Background technique】 [0002] As a kind of green energy, solar energy has been paid more and more attention by people. Existing silicon-based solar cells generally prepare electrodes by printing a conductive paste containing conductive metal powder, glass powder and an organic vehicle on a silicon substrate, drying and firing. The front electrode of the solar cell silicon substrate is generally a negative electrode, and the coated conductive paste is usually a conductive silver paste; the back electrode is generally a positive electrode, and the coated conductive paste is usually a conductive aluminum paste. [0003] Conductive aluminum paste has a great influence on the performance of solar cells. At present, the research on conductive aluminum paste mainly focuses on: ...

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): H01L31/0224H01L31/18
CPCH01L31/022425H01B1/22Y02E10/50
Inventor 谭伟华刘珍
Owner BYD CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com