Glass mixing powder, preparation method thereof and conductive silver paste containing glass mixing powder

A technology of conductive silver paste and glass powder, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of low photoelectric conversion efficiency and electrode peeling strength, unfavorable electrode and silicon ohmic contact, and narrow glass powder sintering process window and other issues, to achieve the effect of improving photoelectric conversion efficiency, good ohmic contact, and reducing series resistance

Active Publication Date: 2012-07-25
JIANGSU RUIDE NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-system glass powder sintering process window is narrow, which is not conducive to the formation of good ohmic c

Method used

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  • Glass mixing powder, preparation method thereof and conductive silver paste containing glass mixing powder
  • Glass mixing powder, preparation method thereof and conductive silver paste containing glass mixing powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A glass mixed powder, the glass mixed powder contains 35wt% of glass powder A and 65wt% of glass powder B, and the softening point of glass powder A is lower than that of glass powder B.

[0021] Wherein, one of glass powder A and glass powder B is lead-free glass powder.

[0022] Wherein, glass powder A is leaded glass powder, and the composition of glass powder A comprises: the PbO of 60wt%, the SiO of 20wt% 2 , 10wt% B 2 o 3 , 7wt% of ZnO and 3wt% of MgO.

[0023] Wherein, the composition of glass powder B includes: 50wt% Bi 2 o 3 , 20wt% SiO 2 , 10wt% ZnO, 15wt% B 2 o 3 , 3wt% TiO 2 and 2wt% Al 2 o 3 .

[0024] Wherein, the particle size of the glass powder A and the glass powder B are both less than 5 μm.

[0025] A kind of preparation method of glass mixed powder, preparation method comprises the following steps:

[0026] The first step: configure raw glass powder according to the ratio described in claim 1;

[0027] Step 2: Put the prepared glass po...

Embodiment 2

[0037] A glass mixed powder, the glass mixed powder contains 40wt% of glass powder A and 60wt% of glass powder B, and the softening point of glass powder A is lower than that of glass powder B.

[0038] Wherein, one of glass powder A and glass powder B is lead-free glass powder.

[0039] Wherein, glass powder A is leaded glass powder, and the composition of glass powder A comprises: the PbO of 65wt%, the SiO of 15wt% 2 , 8wt% B 2 o 3 , 10wt% ZnO and 2wt% MgO.

[0040] Wherein, the composition of glass powder B includes: 60wt% Bi 2 o3 , 15wt% SiO 2 , 8wt% ZnO, 12wt% B 2 o 3 , 1wt% TiO 2 and 4wt% Al 2 o 3 .

[0041] Wherein, the particle size of the glass powder A and the glass powder B are both less than 5 μm.

[0042] A kind of preparation method of glass mixed powder, preparation method comprises the following steps:

[0043] The first step: configure the raw glass powder according to the above ratio;

[0044] Step 2: Put the prepared glass powder into the mixing...

Embodiment 3

[0052] A glass mixed powder, the glass mixed powder comprises 50wt% of glass powder A and 50wt% of glass powder B, and the softening point of glass powder A is lower than that of glass powder B.

[0053] Wherein, glass powder B is lead-free glass powder.

[0054] Wherein, glass powder A is leaded glass powder, and the composition of glass powder A comprises: the PbO of 75wt%, the SiO of 10wt% 2 , 6wt% B 2 o 3 , 8 wt% of ZnO and 1 wt% of MgO.

[0055] Wherein, the composition of glass powder B includes: 70wt% Bi 2 o 3 , 10wt% SiO 2 , 6wt% ZnO, 9wt% B 2 o 3 , 2wt% TiO 2 and 3wt% Al 2 o 3 .

[0056] Wherein, the particle size of the glass powder A and the glass powder B are both less than 5 μm.

[0057] A kind of preparation method of glass mixed powder, preparation method comprises the following steps:

[0058] The first step: configure the raw glass powder according to the above ratio;

[0059] Step 2: Put the prepared glass powder into the mixing equipment and mi...

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Abstract

The invention discloses glass mixing powder, a preparation method of the glass mixing powder as well as conductive silver paste containing the glass mixing powder. The glass mixing powder contains 35-55wt% of glass powder A and 45-65wt% of glass powder B, wherein the softening point of the glass powder A is lower than the softening point of the glass powder B. The preparation method of the glass mixing powder comprises two steps of formulating materials and mixing. The conductive silver paste containing the glass mixing powder comprises the following components by weight: 75-85 percent of silver powder, 5-15 percent of organic carrier and 1-10 percent of glass mixing powder. The two glass powder systems in different proportions are collocated to enable the conductive silver paste to have a wider sintering process window, ensure the glass powder to penetrate an antireflective film and the transportation of silver particles, excellent ohmic contact between an electrode and a battery silicon wafer can be facilitated, series resistance is reduced, and the photon-to-electron conversion efficiency of a battery piece and the peel strength of the electrode are improved.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a glass mixed powder, a preparation method thereof and a conductive silver paste containing the glass mixed powder. Background technique [0002] Solar photovoltaic power generation has become the fastest and largest industry in the field of renewable energy after wind power generation. At present, the solar cells in photovoltaic power generation are still dominated by crystalline silicon solar cells, which are thriving, with a market share of 90%, and the efficiency of large-area commercial solar cells can reach 18-19%. Silver paste is an important material for solar cell electrodes. It is specially used on solar cell silicon wafers by screen printing, covering on silicon glass substrates, and forming conductive electrodes with strong adhesion and low ohmic contact resistance on the surface of solar cells. The photoelectric conversion efficiency of the battery is h...

Claims

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Application Information

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IPC IPC(8): C03C12/00H01B1/16H01B1/22
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
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