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Silver-lead-silicate glass for electroconductive paste composition

A technology of conductive paste and composition, applied in conductive coatings, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems such as high contact resistance

Inactive Publication Date: 2015-09-02
HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The known composition has a high contact resistance due to the insulating effect of the glass at the interface of the metal layer and the silicon wafer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] A first exemplary glass composition ("Glass A") was prepared as described in Table 1. The weighed ingredients were mixed in a pestle and mortar. The mixture was then transferred to an alumina crucible and melted at about 900-1200° C. in an electric furnace type KLS 45 / 11 from Themconcept, Dr. Fischer GmbH & Co. KG, Bremen (Germany). Pour the melt into water to form a frit. These frits were transferred to a glass containing glass with a median particle size of 0.8mm GRINDING MEDIA (ball type) in sintered alumina grinding jars. Dry or wet grinding to the desired glass particle size is carried out by rotating the sintered alumina grinding jar containing the grinding mixture in a planetary ball mill PM 400 from Retsch, Germany. The speed is about 30-300min -1 .

[0101] Table 1. Composition of Exemplary Glass A

[0102] components

Amount (weight% of glass)

PbO

78.83

SiO 2

9.20

Al 2 o 3

4.20

ZnO

0.96

...

Embodiment 2

[0111]A second exemplary glass composition ("Glass B") was prepared according to the preparation method of Example 1. Glass B compositions are described in Table 4. The composition of Glass B was adjusted compared to Glass A to determine the increase in Ag content in the glass. 2 The effect of the amount of O.

[0112] Table 4. Composition of Exemplary Glass B

[0113] components

[0114] Glass B was then mixed with the components described in Table 5 according to the preparation method of Example 1 to form an exemplary paste composition (Paste B).

[0115] Table 5. Composition of Exemplary Paste B

[0116] components

[0117] Paste B and the control paste from Example 1 were screen printed as described in Example 1 on the front side of a lightly doped p-type silicon wafer, dried and fired. The resulting solar cells were then tested by the procedure provided in Example 1 and fully described herein. The normalized electrical properties of Exemplary Past...

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PUM

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Abstract

An electroconductive paste composition including metallic particles, glass frit including lead oxide, silicon dioxide, and silver or a silver-containing compound, and an organic vehicle is provided. The invention also provides a solar cell produced by applying the electroconductive paste according to the invention to a silicon wafer and firing the silicon wafer. The invention further provides a solar cell module comprising electrically interconnected solar cells according to the invention. The invention also provides a method of producing a solar cell, including the steps of providing a silicon wafer having a front surface and a back surface, applying an electroconductive paste according to the invention to the silicon wafer, and firing the silicon wafer.

Description

technical field [0001] The present invention relates to a conductive paste composition. In particular, the paste is used in solar cell technology, especially for forming front electrodes. In one aspect, the conductive paste composition includes conductive metal particles, an organic vehicle, and glass frit. Among other components, the glass frit contains silver or silver-containing compounds. Another aspect of the invention is a solar cell produced by applying the conductive paste of the invention to a silicon wafer. The present invention also provides solar panels comprising electrically interconnected solar cells. According to another aspect, the invention also provides a method for producing a solar cell. Background of the invention [0002] A solar cell is a device that converts light energy into electricity using the photovoltaic effect. Solar energy is an attractive green energy source because it is sustainable and produces only non-polluting by-products. In oper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22C03C12/00H01L31/0224H01L31/18B22F1/065B22F1/068
CPCH01L31/042C03C8/10H01L31/18C04B35/634C09D5/24H01L31/022425C04B35/01H01B1/22C03C3/07C03C8/18C22C32/001Y02E10/50B22F1/065B22F1/068
Inventor D·B·拉斯卡X·C·宋C·L·陈
Owner HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN
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