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Glass powder and solar cell anode conductive silver paste prepared from same

A solar cell and conductive silver paste technology, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve problems such as high difficulty in production technology, short sintering window time, and burn-through of P-N junctions. Achieve high tensile force, slow corrosion rate, and low contact resistance

Inactive Publication Date: 2020-08-14
SHANGHAI TRANSCOM ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the shallow junction technology, due to the shallow P-N junction during sintering, the glass powder used in the prior art and the positive conductive silver paste of the solar cell made of the glass powder have a short sintering window time during the firing process and corrosion If the rate is too high, it is easy to cause the P-N junction to be burned through, the production process is difficult, and the scrap rate is high, resulting in higher production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] This embodiment provides a kind of glass frit used for preparing solar cell anode conductive silver paste, the frit glass includes TeO2, PbO, Li2O, surface active metal compounds and oxides; wherein,

[0011] The mass percentage of TeO2 and glass powder is 10.1-39.9 or 40.0-65.0 or 66.0-69.0 or 69.1-70.0;

[0012] The mass percentage of PbO and glass powder is 1-24 or 25-30 or 31-50;

[0013] The mass percent of Li2O and glass powder is 5.01-15.00;

[0014] The mass percentage of the surface active metal compound and the glass powder is 1-25%.

[0015] Further, the surface active metal compound includes: a metal compound containing V, or a metal compound containing Mo, or a metal compound containing W, or a metal compound containing Ta, or a metal compound containing Hf, or a metal compound containing Cr , or one or more combinations of Nb-containing metal compounds.

[0016] Further, the metal compound includes metal oxide.

[0017] Further, the oxides include: SiO...

Embodiment 2

[0033] This embodiment provides a kind of glass frit used for preparing solar cell anode conductive silver paste, the glass frit includes TeO2, SbO, Li2O, surface active metal compounds and oxides; wherein,

[0034] The mass percentage of TeO2 and glass powder is 10.1-39.9 or 40.0-65.0 or 66.0-69.0 or 69.1-70.0;

[0035] The mass percent of SbO and glass powder is 1-24 or 25-30 or 31-50;

[0036] The mass percent of Li2O and glass powder is 5.01-15.00;

[0037] The mass percentage of the surface active metal compound and the glass powder is 1-25%.

[0038] Further, the surface active metal compound includes: a metal compound containing V, or a metal compound containing Mo, or a metal compound containing W, or a metal compound containing Ta, or a metal compound containing Hf, or a metal compound containing Cr , or one or more combinations of Nb-containing metal compounds.

[0039] Further, the metal compound includes metal oxide.

[0040] Further, the oxides include: SiO2, ...

Embodiment 3

[0056] This embodiment provides a solar cell anode conductive silver paste, including silver powder, glass powder and an organic vehicle; wherein,

[0057] The mass percentage of silver powder and conductive silver paste is 80-90;

[0058] The mass percentage of glass powder and conductive silver paste is 1-5;

[0059] The mass percentage of organic vehicle and conductive silver paste is 5-10;

[0060] The glass powder is the glass powder provided in Embodiment 1 or Embodiment 2 of the present invention.

[0061] Those skilled in the art can understand that glass powder is used to burn through the insulating silicon nitride anti-reflection film, help form Ag / Si ohmic contact, and provide adhesion; the main function of silver powder is to sinter and densify silver powder to form low grid resistance , to provide a good conductive electrode; the main function of the organic carrier is the wetting between powders, printability, appearance, and aspect ratio.

[0062] Further, th...

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PUM

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Abstract

The invention discloses glass powder and solar cell positive electrode conductive silver paste prepared from the same, and the glass powder comprises TeO2, PbO, Li2O, a surface active metal compound and an oxide; the glass powder and the solar cell positive electrode conductive silver paste prepared from the glass powder provided by the invention have a wide sintering window and a slow corrosion rate, so that a P-N junction with a junction depth less than 0.3 [mu] m is not easy to burn out through in a firing process, the process difficulty can be reduced, and a high yield can be ensured.

Description

technical field [0001] The invention relates to the main components of solar cell conductive silver paste and the field of preparation of the conductive silver paste, in particular to a glass powder and a solar cell anode conductive silver paste prepared therefrom. Background technique [0002] A solar cell is a device that converts light energy into electrical energy through the photoelectric effect. Radiation of a suitable wavelength incident on a P-N junction of a semiconductor acts as an external energy source for the generation of hole-electron pairs in the semiconductor. Due to the potential difference at the P-N junction, holes and electrons move across the junction in opposite directions. Electrons move to the negative contact and holes move to the positive contact, creating a current that delivers power to an external circuit. The electrode contacts of a solar cell are important to the performance of the cell. [0003] Solar cell anode conductive silver paste is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 杨建平刘府潮
Owner SHANGHAI TRANSCOM ELECTRONICS TECH
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