Front electrode silver paste of lead-free solar cell

A technology of solar cells and front electrodes, which is applied to conductive materials, circuits, and electrical components dispersed in non-conductive inorganic materials, can solve the problems of poor wettability, difficult to achieve the performance of lead-containing glass powder, and high glass transition temperature. Achieve the effects of good wettability, good electrical conductivity and low glass viscosity

Active Publication Date: 2015-12-02
SUZHOU ISILVER MATERIALS
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  • 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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  • Front electrode silver paste of lead-free solar cell

Examples

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Embodiment 1~5

[0028] Embodiments 1 to 5: a silver paste for the front electrode of a lead-free solar cell, the front silver conductive paste is composed of the following components by weight, as shown in Table 1:

[0029] Table 1

[0030]

Example 1 Example 2 Example 3 Example 4 Example 5 silver conductive phase 80 copies 85 copies 76 copies 88 copies 90 copies Organic solvents 9 servings 10.2 copies 12 copies 11 copies 5.95 servings Ethyl cellulose 0.8 parts 0.6 parts 1 copy 0.9 parts 0.6 parts Butyl cellulose 0.7 parts 0.6 parts 0.5 parts 0.8 parts 0.7 parts Hydroxycellulose 0.5 parts 0.6 parts 0.7 parts 0.65 servings 0.75 parts sodium oxide 0.6 parts 0.48 parts 0.5 parts 0.5 parts 0.3 parts tellurium dioxide 1.15 servings 1.21 copies 1.3 parts 1.25 servings 0.78 parts Tungsten trioxide 0.7 parts 0.83 parts 0.9 parts 1 copy 0.55 parts oxide additiv...

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Abstract

The invention discloses the front electrode silver paste of a lead-free solar cell. The front conductive silver paste comprises the following components by weight in 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 hydroxypropyl-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 silicon dioxide, and 0.04-0.1 part of lithium oxide. According to the invention, the existing performances in the prior art are maintained by the front electrode silver paste of the lead-free solar cell, while the glass is low in viscosity and good in wettability with other components. After the printing and sintering process of the paste, the paste is good in contractility and does not easily diffuse. Therefore, the fineness of printed graphics is improved.

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 Applications(China)
IPC IPC(8): H01B1/22H01L31/0224
Inventor 周欣山汪山包娜
Owner SUZHOU ISILVER MATERIALS
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