Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-temperature-sintered silver paste and preparation method thereof

A low-temperature sintering and silver paste technology, which is applied in the field of solar cells, can solve problems such as unsuitability for large-scale production, complicated preparation methods, and expensive nano-silver powder, and achieve the effects of filling sintering voids, improving yield, and reducing damage

Active Publication Date: 2021-04-20
NANTONG T SUN NEW ENERGY CO LTD +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the nano-silver powder in this method is expensive, the preparation method is complicated, and it is not suitable for industrialized large-scale production.

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
  • Low-temperature-sintered silver paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Select the silver powder with a mass fraction of 83.6wt%, 10wt% organic vehicle, 6wt% low softening point glass powder, and 0.4wt% aluminum-silicon alloy powder to form the low-temperature sintered silver paste of this embodiment. Its comprehensive properties are as follows: As shown in Table 1, it can be seen that the sintering temperature of the low-temperature sintered silver paste obtained in this embodiment is 700°C, and the surface of the sintered silver paste is observed by a profiler to be smooth, with fewer voids and a contact resistivity of 0.5mΩ·cm -2 , the adhesion force is 4.3N, and the photoelectric conversion efficiency range is 21.35%.

Embodiment 2

[0064] Silver powder with a mass fraction of 90wt%, 7.1wt% organic vehicle, 2wt% low-softening point glass powder, and 0.9wt% aluminum-boron alloy powder additive form the low-temperature sintered silver paste of this embodiment. As shown in Table 1, it can be seen that the sintering temperature of the low-temperature sintered silver paste obtained in this example is 720°C, and the surface of the sintered silver paste is observed by a profiler to be smooth, with fewer voids and a contact resistivity of 0.5mΩ·cm -2 , the adhesion force is 4.1N, and the photoelectric conversion efficiency range is 21.25%.

Embodiment 3

[0066] Silver powder with a mass fraction of 80wt%, 9.99wt% organic vehicle, 10wt% low-softening point glass powder, and 0.01wt% aluminum-silicon-boron alloy powder were selected to form the low-temperature sintered silver paste of this embodiment. As shown in Table 1, it can be seen that the sintering temperature of the low-temperature sintered silver paste obtained in this example is 715°C, and the surface of the sintered silver paste is observed by a profiler to be smooth, with fewer voids and a contact resistivity of 0.5mΩ·cm -2 , the adhesion force is 4.2N, and the photoelectric conversion efficiency range is 21.45%.

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
densityaaaaaaaaaa
densityaaaaaaaaaa
bulk densityaaaaaaaaaa
Login to View More

Abstract

The invention provides low-temperature-sintered silver paste and a preparation method thereof, belonging to the technical field of solar cells. The low-temperature-sintered silver paste comprises 80 wt%-90 wt% of silver powder, 5 wt%-15 wt% of an organic carrier, 2 wt%-10 wt% of low-softening-point glass powder and 0.01 wt%-0.9 wt% of an aluminum alloy powder additive, wherein the aluminum alloy powder additive comprises at least one selected from an aluminum-silicon alloy powder additive, an aluminum-boron alloy powder additive and an aluminum-silicon-boron alloy powder additive. According to the invention, the aluminum alloy powder additive is added into the low-temperature-sintered silver paste to serve as a sintering accelerant, so the sintering activity of the silver paste is effectively improved, good ohmic contact is formed between the silver paste and a silicon wafer of the solar cell, sintering temperature is effectively reduced and ranges from 700-720 DEG C, and the problem that sintering temperature is too high at present is solved; and therefore, the damage of high-temperature sintering to the solar cell is reduced, and photoelectric conversion efficiency is further improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a low-temperature sintered silver paste and a preparation method thereof. Background technique [0002] Solar cell technology has attracted high attention due to its cleanness, environmental protection and continuous availability. However, the further promotion of solar cells is restricted due to the price of monocrystalline and polycrystalline silicon wafers that dominate the solar cell industry, and the complicated process of cell production. Improving the photoelectric conversion efficiency of solar cells can effectively reduce costs. Theoretical studies have shown that for every percentage increase in the photoelectric conversion efficiency of solar cells, the corresponding cost of power generation will decrease by 7%. [0003] The efficiency of solar cells is affected by many factors. In addition to the difference in photoelectric conversion efficiency cause...

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): H01B1/22H01B1/16H01B13/00H01L31/0224
Inventor 毛平
Owner NANTONG T SUN NEW ENERGY CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com