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Silicon solar cell front conductive silver paste and preparation method thereof

A technology of silicon solar cells and conductive silver paste, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. The problems of sintering and matching of layers of heterogeneous materials can achieve excellent silver burning effect, high electroplating efficiency, and the effect of improving output resistance.

Active Publication Date: 2019-05-24
深圳磐汩新能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a front conductive silver paste of silicon solar cells and its preparation method, aiming to solve the problem that the traditional front conductive silver paste of silicon solar cells cannot take into account the effective realization of ohmic contact and the sintering matching of silver paste and silicon layer heterogeneous materials The problem

Method used

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  • Silicon solar cell front conductive silver paste and preparation method thereof
  • Silicon solar cell front conductive silver paste and preparation method thereof
  • Silicon solar cell front conductive silver paste and preparation method thereof

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preparation example Construction

[0044] And, the embodiment of the present invention also provides a method for preparing conductive silver paste on the front side of a silicon solar cell, comprising the following steps:

[0045] S01. Preparation of modified TeO 2 -Li 2 O-Ag 2 O-PbO glass powder: The glass frit oxide or the compound that can be decomposed into the inorganic oxide, and the modification additive are weighed, mixed, melted, quenched, crushed, and sieved in order to make a modified TeO 2 -Li 2 O-Ag 2 O-PbO glass powder;

[0046] Specifically, in the above step S01, the types of the glass frit oxide or the compound that can be decomposed into the inorganic oxide, and the modification additive are as described above, and will not be repeated here to save space.

[0047] S02. Preparation of nano-alloy powder coated with organic matter on the surface: mix the elemental powders of Ag, Pb, Bi, and Si according to the ratio, high-temperature melting alloying, cooling, crushing, and sieving, first p...

Embodiment 1-6

[0058] A conductive silver paste on the front side of a silicon solar cell, including silver powder, glass powder, organic carrier, surface-treated nano-alloy powder, and special additives, the silver powder is micron-scale silver powder, and the glass powder is modified TeO 2 -Li 2 O-Ag 2 O-PbO glass powder, the surface-treated nano-alloy powder is a nano-alloy powder coated with organic matter on the surface, and the special additive is an alkali metal salt plated with silver on the surface. The quality of each component is as follows Table 1. Examples 1-6 Said, the unit in the table is g, wherein, the component numbers correspond to the numbers in Table 2-5 below.

[0059] A preparation method for front conductive silver paste of silicon solar cells, comprising the steps of:

[0060] Modified TeO 2 -Li 2 O-Ag 2 Preparation of O-PbO glass powder: First, weigh the ratio shown in Table 2, the unit in the table is g, ball mill and mix at 150r / min for 60min, then put it in ...

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Abstract

The invention provides a silicon solar energy cell right side conductive silver slurry. The silicon solar energy cell right side conductive silver slurry comprises silver powder, glass powder, an organic carrier, nanometer alloy powder after surface treatment and an additive, wherein the silver powder is micron-level silver powder, the glass powder is modified TeO2-Li2O-Ag2O-PbO glass powder, the nanometer alloy powder after surface treatment is Ag-Pb-Bi-Si alloy powder of which the surface is wrapped in an organic matter, the additive is alkali metal salt treated through silver plating on the surface, if total weight of the silicon solar energy cell right side conductive silver slurry is taken as 100%, weight percents of components of the silicon solar energy cell right side conductive silver slurry are as follows, micron-level silver 60-90%, the modified TeO2-Li2O-Ag2O-PbO glass powder 0.1-10%, the organic matter 1-15%, the nanometer alloy powder after surface treatment 0.1-15% and the additive 0.1-5%.

Description

technical field [0001] The invention belongs to the technical field of silicon solar cells, and in particular relates to a front conductive silver paste of a silicon solar cell and a preparation method thereof. Background technique [0002] After realizing that the traditional fossil energy is about to be exhausted, people have never stopped exploring new energy sources. At present, the most important new energy sources are solar energy and nuclear energy, but the use of nuclear energy is very difficult to control, so solar energy has successfully become the cleanest and most effective new type of renewable energy. At present, the utilization of solar energy mainly focuses on the use of solar energy to generate electricity and convert solar energy into electrical energy. As a major application of solar cells, solar cells are gradually being widely used in daily life. A solar cell is a semiconductor device that converts solar energy into electrical energy. Its working princi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425
Inventor 舒明飞
Owner 深圳磐汩新能源有限公司
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