A kind of silver paste on the back of crystalline silicon solar cell with low silver content and its preparation method

A technology of solar cells and silver content, which is applied in the direction of cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of limited reduction of silver content, unstable long-term use performance, poor aging resistance, etc., to reduce silver content, prepare The process is simple and easy, and the effect of strong adhesion

Active Publication Date: 2017-05-31
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] To sum up, there are many problems in the existing silver paste technology for the back of crystalline silicon solar cells with low silver content. The reduction of silver content is limited.

Method used

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  • A kind of silver paste on the back of crystalline silicon solar cell with low silver content and its preparation method
  • A kind of silver paste on the back of crystalline silicon solar cell with low silver content and its preparation method
  • A kind of silver paste on the back of crystalline silicon solar cell with low silver content and its preparation method

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Embodiment Construction

[0037] The present invention will be described in detail below through specific examples. The contents of each example are only used for understanding the present invention, and should not be construed as limiting the protection scope of the present invention.

[0038] Using the raw materials, ratios, and process conditions shown in Table 1, the silver paste on the back of the crystalline silicon solar cell with low silver content was prepared.

[0039] Table 1 Raw materials and process conditions used in Examples 1-5 of the present invention

[0040]

[0041]

[0042] The detailed steps for preparing the silver paste on the back of the crystalline silicon solar cell with low silver content are as follows:

[0043] 1).Preparation of anti-aging inorganic adhesive

[0044]According to the raw materials and proportions shown in Table 1, mix the raw materials evenly and put them in the platinum crucible, heat the platinum crucible with a high-temperature furnace, and keep i...

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Abstract

A low-silver-content crystalline silicon solar battery back silver paste and a preparation method thereof. The raw material ratio of the back silver paste is calculated by weight percentage as follows: flaky silver powder, spherical silver powder, aging-resistant inorganic adhesive, organic vehicle, and additives. The preparation method includes: 1). Preparation of anti-aging inorganic adhesive; 2). Preparation of organic vehicle; 3). Preparation of back silver paste: weighing raw materials according to the formula amount; mixing two kinds of silver powder and anti-aging inorganic adhesive , to obtain a mixed powder; the mixed powder, an organic carrier, and additives are added to a double planetary mixer and mixed to obtain a mixed slurry; the slurry is ground with a three-roll mill to control the fineness of the slurry <20 μm, and the viscosity of the slurry is 25~40pa.s; 4). Vacuum defoaming; back silver paste products. This back silver paste has extremely low silver content and low cost. The formed back silver electrode has good solderability and solder resistance, strong adhesion, excellent aging resistance, and can form a good ohmic bond with the silicon substrate. contact features.

Description

technical field [0001] The invention relates to a back silver paste, in particular to a back silver paste of a crystalline silicon solar cell, and a preparation method of the back silver paste. Background technique [0002] A solar cell is a semiconductor device that converts light energy into electrical energy. The generated electrical energy can be conducted through the metallized electrodes formed by sintering the solar cell electronic paste. The silver paste on the back of the solar cell is the main component of the electronic paste of the solar cell. It is mainly used to make the back electrode in the production process of the solar cell, and collect and export the current collected by the aluminum back field. [0003] The silver paste on the back of the solar cell is mainly composed of silver powder, organic solvent, inorganic binder and additives. As the functional phase in the paste, the silver powder mainly plays the role of conductivity. In the production process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 朱健苟鹏飞李丹丹卢毅崔隆宇钟连兵肖毅
Owner DONGFANG TURBINE CO LTD
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