Crystalline silicon solar cell front electrode silver paste

A solar cell, front electrode technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of poor wettability, difficult to achieve the performance of lead-containing glass powder, high glass transition temperature, and achieve good wettability, good contact, The effect of low glass viscosity

Active Publication Date: 2017-03-15
SUZHOU ISILVER MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Crystalline silicon solar cell front electrode silver paste
  • Crystalline silicon solar cell front electrode silver paste

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Experimental program
Comparison scheme
Effect test

Embodiment 1~5

[0027] Embodiments 1 to 5: a silver paste for the front electrode of a crystalline silicon solar cell, the front silver conductive paste is composed of the following components by weight, as shown in Table 1:

[0028] Table 1

[0029]

[0030] The oxide additive is composed of the following components by weight, as shown in Table 2:

[0031] Table 2

[0032]

[0033] The above-mentioned organic solvent is at least one of terpineol, butyl carbitol, butyl carbitol acetate and propylene glycol methyl ether acetate.

[0034] Embodiment 1 silver conductive phase is made up of flake silver powder 9%, spherical silver powder 85% and nano silver powder 6%, and embodiment 2 silver conductive phase is made up of flake silver powder 7%, spherical silver powder 88% and nano silver powder 5%, embodiment 3 The silver conductive phase is composed of 12% flake silver powder, 82% spherical silver powder and 6% nano silver powder; embodiment 4 The silver conductive phase is composed of ...

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Abstract

The invention discloses front electrode silver paste of a crystalline silicon solar battery. The front electrode silver paste comprises the following components in weight part: 75-91 parts of silver conductive phase, 5-12 parts of organic solvent, 0.7-1 part of ethyl cellulose, 0.4-0.8 part of butyl cellulose, 0.4-0.8 part of hydroxy cellulose, 0.3-0.6 part of sodium oxide, 0.7-1.3 part of tellurium dioxide, 0.55-1 part of tungsten trioxide, 0.25-0.5 part of oxide additives, 0.08-0.2 part of silica and 0.04-0.1 part of lithium oxide. The silver conductive phase is composed of the following components in mass percent: 6-12% of flake silver powder, 80-90% of ball silver powder and 3-8% of nano-silver powder. According to the technical scheme of the invention, by means of the front electrode silver paste of the crystalline silicon solar battery, not only the fineness of printed graphics is improved, but also the metal grid lines of electrodes are good in conductive property. 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. , 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): H01L31/0224H01L31/036
CPCH01L31/022425H01L31/036Y02E10/50
Inventor 包娜汪山周欣山
Owner SUZHOU ISILVER MATERIALS
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