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Method for preparing silicon solar cell positive electrode and main grid paste thereof

A technology of silicon solar cells and front electrodes, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc., can solve the problems of waste materials, achieve the degree of inhibition of penetration, excellent mechanical bonding force , the effect of improving conversion efficiency

Inactive Publication Date: 2013-12-11
ZHEJIANG GUANGDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional silicon cell manufacturing uses a screen printing process to make the front electrode, and the main grid and the fine grid use the same silver paste, which means that the optimization of the functions of the two grid line materials cannot be fully utilized, and the use of materials is wasted.

Method used

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  • Method for preparing silicon solar cell positive electrode and main grid paste thereof
  • Method for preparing silicon solar cell positive electrode and main grid paste thereof
  • Method for preparing silicon solar cell positive electrode and main grid paste thereof

Examples

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Embodiment 1

[0049] Example 1: A silicon solar cell positive electrode busbar paste and its preparation method

[0050] see image 3 , according to No. 1-6 formulations in Table 1, the main material with good dispersion and uniform composition can be obtained after component adjustment, dispersion, rolling and other processes. The metal conductive powder described in the formula is composed of fine particles of nearly spherical silver powder with a particle size of 0.5-2.5 μm and a tap density of 3.0-4.0 g / ml, and a small particle-sized flake-shaped silver powder with a particle size of 2-5 μm and a tap density of At 2-3.5g / ml, the glass powder is PbO-B 2 o 3 -SiO 2 glass system. One or more of the high molecular resin ethyl cellulose and acrylic resin. The solvent is one or more of terpineol and butyl carbitol ester. The glass formulation selected in the recipe is as figure 2 As shown in 1-6, after mixing the materials evenly, use a three-roll mill to fully grind and roll to reach...

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Abstract

The invention discloses a method for preparing a silicon solar cell positive electrode and the main grid paste of the silicon solar cell positive electrode, and relates to the technical field of the manufacturing processes and the materials of electronic devices. The method for preparing the silicon solar cell positive electrode comprises the steps that 1) the electrode of a main grid and the electrode of a thin grid are respectively printed through two times of silk-screen printing; 2) different paste with silver or silver paste is adopted when the electrode of the main grid and the electrode of the thin grid are printed; 3) after sintering, the thickness of the electrode of the main grid is smaller than that of the electrode of the thin grid. The method can ensure the good dispersion of all components, even and soft silver electrode paste is obtained after rolling, and a silicon solar cell product is made to have good, stable and even electrical performance after the sintering.

Description

Technical field: [0001] The invention relates to the technical field of manufacturing technology and materials of electronic devices, and in particular to a slurry for a front electrode busbar of a silicon solar cell. Background technique: [0002] With the continuous development of the photovoltaic industry, there are more and more photovoltaic solar energy manufacturers and slurry manufacturers at home and abroad, and the market competition tends to be fierce. How to ensure that the performance requirements of solar cell manufacturers are met or improved. The cost of slurry production and the improvement of product competition will become the key research objects of slurry manufacturers. At present, solar cell manufacturers use back electrode paste with low silver content in the back electrode and change the graphic design of the back electrode to reduce the amount of silver used, which can effectively reduce the production cost of the back electrode of solar paste; while ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0224H01B1/22H01B13/00
CPCY02P70/50
Inventor 杨至灏孟淑媛奉向东江志坚唐元勋安艳陈娟
Owner ZHEJIANG GUANGDA ELECTRONICS TECH
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