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Preparation method for front electrode silver paste of photovoltaic cell

A front electrode, photovoltaic cell technology, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. and other problems, to achieve the effect of good wettability, low glass viscosity and good electrical conductivity

Active Publication Date: 2015-12-02
SUZHOU ISILVER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been many studies on lead-free glass powder suitable for solar cells, but it is difficult to meet or exceed the performance of lead-containing glass powder, mainly due to the problems of high glass transition temperature and poor wettability

Method used

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  • Preparation method for front electrode silver paste of photovoltaic cell
  • Preparation method for front electrode silver paste of photovoltaic cell
  • Preparation method for front electrode silver paste of photovoltaic cell

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Embodiment 1~5

[0019] Embodiment 1~5: A kind of preparation method that is used for the front electrode silver paste of photovoltaic cell, described front silver conductive paste is made up of the following components by weight, as shown in Table 1:

[0020] Table 1

[0021]

[0022] The oxide additive is composed of the following components by weight, as shown in Table 2:

[0023] Table 2

[0024]

[0025] The above-mentioned organic solvent is at least one of terpineol, butyl carbitol, butyl carbitol acetate and propylene glycol methyl ether acetate.

[0026] The above-mentioned preparation method for the silver paste of the positive electrode of the photovoltaic cell comprises the following steps:

[0027] Step 1. Add 0.3~0.6 parts of sodium oxide, 0.7~1.3 parts of tellurium dioxide, 0.55~1 part of tungsten trioxide, 0.25~0.5 parts of oxide additives, 0.08~0.2 parts of silicon dioxide, and 0.04~0.1 parts of lithium oxide. Mix evenly in a blender, place in a muffle furnace, keep w...

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Abstract

The invention discloses a preparation method for the front electrode silver paste of a photovoltaic cell. The method comprises the steps of firstly, placing sodium oxide, tellurium dioxide, tungsten trioxide, silica and oxide additives in a blender mixer, and uniformly mixing up the above materials to obtain a water-quenched glass frit; secondly, grinding the above water-quenched glass frit in an alcohol system inside a planet type grinding machine to obtain glass powder; thirdly, adding an organic solvent, ethyl cellulose, butyl cellulose and hydroxy cellulose, and stirring to obtain a carrier; fourthly, adding a silver conductive phase, the above glass powder and the above carrier, uniformly stirring the above materials, grinding and filtering the mixture to obtain the front electrode silver paste of a lead-free solar cell. The silver conductive phase comprises the following components in mass percentage: 6-12% of flake silver powder, 80-90% of ball silver powder and 3-8% of nanometer silver powder. According to the technical scheme of the invention, not only the fineness of printed graphics is improved, but also the metal grid lines of electrodes are good in conductive performance. Therefore, fine grid lines, high in aspect ratio, can be formed on the front surfaces of electrodes.

Description

technical field [0001] The invention relates to a front silver conductive paste of a crystalline silicon solar cell, belonging to the technical field of solar cell functional materials. Background technique [0002] The depletion of traditional energy sources and the increasingly severe environmental pollution caused by them have become more and more prominent. The use of solar power to generate electricity has made great progress in recent years. Solar photovoltaic cells convert solar energy into electrical energy through the photoelectric effect. Its working principle is generally: an N-type layer is formed by diffusion on a P-type substrate, and a P-N junction is formed at the critical point. When light irradiates the P-N junction, photogenerated carriers will be generated, and the carriers will be exported to the battery through a good conductor material. , thus forming current generation. This kind of good conductor material is the front electrode silver paste, the ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/22H01B1/16H01L31/0224
Inventor 包娜汪山周欣山
Owner SUZHOU ISILVER MATERIALS
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