Lead-free glass powder for silver paste on back of crystalline silicon solar cell and preparation method thereof

A lead-free glass powder and solar cell technology, which is applied in the field of solar cells, can solve problems such as unstable solderability, poor adhesion between paste and silicon substrate, mismatch between expansion coefficient and silicon chip, and achieve The effect of lowering the softening point, improving the stability of the network structure, and reducing the expansion coefficient
CN103193391AActive Publication Date: 2013-07-10JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
Publication Date
2013-07-10

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Abstract

The invention relates to a lead-free glass powder for silver paste on the back of a crystalline silicon solar cell and a preparation method thereof. The lead-free glass powder comprises the following raw materials in parts by weight: 40-70 parts of Bi2O3, 5-15 parts of B2O3, 0.5-5 parts of ZrO2, 10-20 parts of SiO2, 5-20 parts of ZnO, 1-5 parts of TiO2, 5-20 parts of Al2O3 and 1 part of P2O5. The preparation method comprises the following steps of: placing the raw materials in a mixer, and uniformly mixing to form a mixture; preheating a quartz crucible to 600-800 DEG C, placing the mixture in the quartz crucible and carrying out heat preservation for 20 minutes; then smelting for 20 minutes to 40 minutes at 900-1200 DEG C; pouring molten glass into deionized water for quenching, carrying out wet-process ball milling on the quenched glass to 2-5mu m, and drying to obtain the lead-free glass powder. The lead-free glass powder has the advantages that the technological process is simple, time consumption for smelting is short and cost is low; when in use, the lead-free glass powder has good wettability with silver powder and a silicon substrate; and after the lead-free glass powder is sintered, the adhesive force between the lead-free glass powder and the silicon substrate is above 5N.
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Description

technical field

[0001] The invention relates to an electronic paste for crystalline silicon solar cells, in particular to a lead-free glass powder for silver paste on the back of crystalline silicon solar cells, and a preparation method for lead-free glass powder for silver paste on the back of crystalline silicon solar cells , belonging to the technical field of solar cells. Background technique

[0002] As a green and inexhaustible new energy source, solar energy has developed rapidly under the vigorous promotion of various countries around the world. At present, crystalline silicon solar cells dominate the market, occupying the most important solar cell market.

[0003] In the production process of the crystalline silicon solar cell, the silver conductive paste is printed on the back of the silicon wafer, and the solar cell modules are connected in series or in parallel by welding the backside silver paste with the ribbon.

[0004] The silver paste is mainly composed of...

Claims

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