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Solar energy battery electrode-conducting silver slurry containing micron-size mixed silver powders

A technology for solar cells and conductive silver paste, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials. The effect of good performance and welding resistance, and high conversion efficiency

Active Publication Date: 2012-07-18
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The silver powder used in the above-mentioned silver powder system has a small particle size, which not only causes agglomeration problems, but also directly leads to higher production costs of the silver paste

Method used

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  • Solar energy battery electrode-conducting silver slurry containing micron-size mixed silver powders

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The silver paste includes mixed silver powder, glass powder, and an organic carrier. The mixed silver powder is composed of: 5 wt% of silver powder particles with a particle size of 0.1-1 μm, 50 wt% of silver powder particles with a particle size of 1-3 μm, and 45% of silver powder particles with a particle size of 3 ~6μm silver powder particles.

[0017] Wherein, the mixed silver powder particles are spherical and / or spherical.

[0018] Wherein, the composition of the conductive silver paste includes: 75wt% mixed silver powder, 15wt% glass powder and 5wt% organic vehicle.

[0019] Wherein, the conductive silver paste also includes 5wt% additive, and the additive is MoO 3 .

[0020] Wherein, the organic vehicle contains 55% organic solvent, and the organic vehicle also contains 20% thixotropic regulator, 20% plasticizer and 5% surfactant.

[0021] Wherein, the organic solvent is a composition of terpineol and tributyl citrate, and the weight ratio is 1:1.

[0022] W...

Embodiment 2

[0024] The silver paste includes mixed silver powder, glass powder, and an organic vehicle. The mixed silver powder is composed of: 10 wt% of silver powder particles with a particle size of 0.1-1 μm, 40 wt% of silver powder particles with a particle size of 1-3 μm, and 50% of silver powder particles with a particle size of 3 ~6μm silver powder particles.

[0025] Wherein, the mixed silver powder particles are spherical and / or spherical.

[0026] Wherein, the composition of the conductive silver paste includes: 80wt% mixed silver powder, 7wt% glass powder and 10wt% organic vehicle.

[0027] Wherein, the conductive silver paste also includes an additive of 3wt%, and the additive is Ta 2 o 5 and MoO 3 The composition, the weight ratio is 1:1.

[0028] Wherein, the organic vehicle contains 60% organic solvent, and the organic vehicle also contains 15% thixotropic regulator, 24% plasticizer and 1% surfactant.

[0029] Wherein, the organic solvent is a composition of terpineol ...

Embodiment 3

[0032] The silver paste includes mixed silver powder, glass powder, and an organic carrier. The mixed silver powder is composed of: 15 wt% of silver powder particles with a particle size of 0.1-1 μm, 30 wt% of silver powder particles with a particle size of 1-3 μm, and 55% of silver powder particles with a particle size of 3 ~6μm silver powder particles.

[0033] Wherein, the mixed silver powder particles are spherical and / or spherical.

[0034] Wherein, the composition of the conductive silver paste includes: 85wt% mixed silver powder, 1wt% glass powder and 13wt% organic vehicle.

[0035] Wherein, the conductive silver paste also includes an additive of 1wt%, and the additive is Ta 2 o 5 , V 2 o 5 and MoO 3 The composition, the weight ratio is 1:1:2.

[0036] Wherein, the organic vehicle contains 63% organic solvent, and also contains any one or more of 17% thixotropic regulator, 15% plasticizer and 5% surfactant .

[0037] Wherein, the organic solvent is a compositio...

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Abstract

The invention discloses solar energy battery electrode-conducting silver slurry containing micron-size mixed silver powders. The silver slurry comprises mixed silver powders, glass powders, organic carriers and mixed silver powders, wherein the mixed silver powders are composed of, by weight, 5% to 15% of silver powders with grain size from 0.1 micrometers to 1 micrometer, 30% to 50% of silver powders with grain size from 1 micrometer to 3 micrometers, and the balance silver powders with grain size from 3 micrometer to 6 micrometers. According to the solar energy battery electrode-conducting silver slurry containing micron-size mixed silver powders, the silver powders are high in tap density and can form dense net with excellent conducting performance after sintering so that the contact area of the silver silicon interface can be increased and the conversion efficiency of battery electrodes is high; the surface of the electrodes is smooth, and the electrodes have good in solderability and strong adhesive force.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a solar cell electrode conductive silver paste containing micron-scale mixed silver powder. Background technique [0002] Conductive silver paste for solar cell electrodes is the key basic material for the production of silicon solar photovoltaic cells and a very critical technical point in the production of solar cells. The slurry is made into electrodes of solar cells through screen printing, low-temperature drying, and high-temperature sintering processes. [0003] The silver paste is mainly composed of raw materials such as silver powder, ultrafine glass powder, organic carrier and modifier in a certain proportion. Among them, silver powder is a conductive medium, and factors such as the size, shape and particle size distribution of silver powder have a great influence on the electrical properties of battery electrodes. Silver powder with smaller particles has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01L31/0224
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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