Method for preparing silver paste for front electrode of photovoltaic cell

A front electrode and photovoltaic cell technology, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of poor wettability, high glass transition temperature, and difficulty in achieving the performance of lead-containing glass powder etc. to achieve the effects of good wettability, low glass viscosity and good electrical conductivity

Active Publication Date: 2017-07-18
SUZHOU ISILVER MATERIALS
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  • 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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  • Method for preparing silver paste for front electrode of photovoltaic cell
  • Method for preparing silver paste for front electrode of photovoltaic cell
  • Method for preparing silver paste for front electrode 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 wa...

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Abstract

The invention discloses a method for preparing silver paste for front electrodes of photovoltaic cells, which comprises the following steps: mixing sodium oxide, tellurium dioxide, tungsten trioxide, silicon dioxide and oxide additives in a mixer to obtain water Quenched glass frit; grind the water-quenched frit obtained in step 1 with a planetary grinder in an alcohol system to obtain glass powder; stir an organic solvent, ethyl cellulose, butyl cellulose, and hydroxy cellulose to obtain a carrier ; After stirring the silver conductive phase, glass powder, and carrier evenly, grind and filter to obtain the silver paste of the front electrode of the lead-free solar cell; the silver conductive phase is composed of the following components in mass percentage: flake silver powder 6~12 %, spherical silver powder 80~90% and nano silver powder 3~8%. The invention not only improves the fineness of the printed pattern, but also makes the electrode metal grid line itself have good electrical conductivity, and obtains a front fine grid line with a high aspect ratio.

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. , so as to form current generation. This kind of good conductor material is the front electrode silver paste, the b...

Claims

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Application Information

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Patent Type & Authority Patents(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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