A kind of low-temperature silver paste based on silver nanofiber and preparation method thereof

A silver nanofiber and low-temperature technology, which is applied in the field of low-temperature conductive silver paste and its preparation, can solve the problems of high silver paste cost and expensive copper price, and achieve the effects of reducing paste cost, mass fraction, and consumption

Active Publication Date: 2018-03-16
SICHUAN AIERFATAIKE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its main components are silver powder and silver-coated copper powder, the price of copper is very expensive, and the cost of preparing silver paste is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The above-mentioned low-temperature silver paste based on silver nanofibers, wherein the silver nanofibers are prepared by the following steps:

[0034] a, the preparation of the precursor solution: according to the weight ratio, take ethanol: acetic acid: silver nitrate: PVP=5 ~ 8: 1 ~ 3: 1 ~ 2: 0.5 ~ 1, mix, stir with a magnetic stirrer for 10 ~ 15h, get Precursor solution;

[0035] b. Preparation of cotton-like silver nanofibers by air spinning: use a syringe to take part of the precursor solution obtained in step a and perform air spinning at 0.2-0.3 MPa and 30-40% humidity to obtain cotton-like silver nanofibers;

[0036] c. Preparation of silver nanofibers: heating the cotton-like silver nanofibers obtained in step b to 400-500°C at a heating rate of 1-3min / °C, keeping the temperature for 100-150min, cooling to room temperature, and ball milling.

[0037] The above-mentioned low-temperature silver paste based on silver nanofibers, wherein the preparation method o...

Embodiment 1

[0053] 1. Preparation of silver nanofiber low temperature conductive silver paste

[0054] A low-temperature conductive silver paste of silver nanofibers, the curing temperature of which is between 450°C and 550°C, and the weight percentages of the components are as follows: 70% of silver nanofibers, 10% of silver-coated low-melting glass powder, and 15% of organic vehicles , Inorganic additives 5%. Fully disperse and mix each component through a three-roller machine, and the specific preparation method is as follows:

[0055] 1. Preparation of silver nanofibers

[0056] Weighed 5.83g of ethanol, 1.98g of acetic acid, 1.4g of silver nitrate, and 0.7g of PVP with an analytical balance, and placed them in a beaker and stirred them on a magnetic stirrer for 12 hours to prepare a precursor solution;

[0057] Use a 5mL syringe to ingest 4mL of the prepared precursor solution;

[0058] Fix the syringe on the spinning apparatus and carry out air spinning under 0.25MPa pressure and...

Embodiment 2

[0073] 1. Preparation of silver nanofiber low temperature conductive silver paste

[0074] A low-temperature conductive silver paste of silver nanofibers, the solidification temperature of which is between 450°C and 550°C, and the weight percentages of its components are as follows: 60% of silver nanofibers, 15% of silver-coated low-melting glass powder, and 20% of organic vehicles , Inorganic additives 5%. Fully disperse and mix each component through a three-roller machine, and the specific preparation method is as follows:

[0075] 1. Preparation of silver nanofibers

[0076] Weigh 5 g of ethanol, 1 g of acetic acid, 1.8 g of silver nitrate, and 1 g of PVP with an analytical balance, and place them in a beaker and stir on a magnetic stirrer for 15 hours to prepare a precursor solution;

[0077] Use a 5mL syringe to ingest 4mL of the prepared precursor solution;

[0078] Fix the syringe on the spinning apparatus and carry out air spinning under 0.2MPa pressure and 40% hum...

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Abstract

The invention relates to low-temperature conductive silver paste used by a solar cell and a preparation method thereof, in particular to low-temperature silver paste based on silver nano fibers and a preparation method thereof. The low-temperature silver paste based on the silver nano fibers, which is disclosed by the invention, consists of the following ingredients in percentage by weight: 50 to 70% of silver nano fibers, 10 to 20% of silver-plated glass powder, 15 to 25% of organic carrier, and 0 to 5% of inorganic additive. When the method disclosed by the invention is adopted to prepare the silver-nano-fiber low-temperature conductive silver paste, on the premise of not reducing the electrical property of the conductive silver paste, consumption of the precious metal silver is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to a low-temperature conductive silver paste used in solar cells and a preparation method thereof, in particular to a low-temperature silver paste based on silver nanofibers and a preparation method thereof. Background technique [0002] Energy is an important material basis for the development of the national economy and the improvement of human living standards. The development of social economy is accompanied by the continuous deterioration of environmental and resource problems. According to the estimates of scientists, by 2050, the oil, coal and other resources on the earth we live on will be on the verge of depletion, and the globalized energy crisis will be inevitable. In order to improve the crisis, further strengthening the protection of the environment and developing new clean energy have become urgent problems to be solved. Among them, solar energy has the advantages of being inexhaustible, inexhaustible, clean and env...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22B82Y30/00H01L31/0224H01B13/00
CPCB82Y30/00H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 王宁陈海军
Owner SICHUAN AIERFATAIKE TECH CO LTD
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