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Electrode paste for buried-gate type crystalline silicon solar cell

A solar cell and electrode paste technology, which is applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve the problem of no electrode paste, and achieve the effect of reducing viscosity and surface tension

Inactive Publication Date: 2017-06-13
北京市合众创能光电技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no printable electrode paste suitable for grooves

Method used

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  • Electrode paste for buried-gate type crystalline silicon solar cell

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Embodiment Construction

[0014] An electrode paste for a buried gate type crystalline silicon solar cell, the composition and weight percentage of the paste are: 80-92% silver powder, 1-4% glass powder, 0.1-5% additive, 3-3% organic carrier 12%.

[0015] The shape of the silver powder is spherical, and the D50 of the silver powder particles is 0.5-3um.

[0016] Glass powder is a particle, its diameter D50 is 0.3-15μm, and its composition and mole percentage are: 5-60% tellurium oxide, 1-45% bismuth oxide, 1-50% lead oxide and 0.1-10% Zinc oxide, and other metal oxide components containing tungsten, cadmium, and lithium, the sum of the mole percentages of each component is 100%.

[0017] The additive is at least one of thixotropic agent, viscosity regulator, surfactant, stabilizer, dispersant, thickener, wetting and dispersing agent, plasticizer and defoamer.

[0018] The organic carrier is a mixture of organic resin and organic solvent, wherein the organic resin is polybutylmethacrylate, ethyl cellu...

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Abstract

The invention relates to the technical field of solar paste, in particular to electrode paste for a buried-gate type crystalline silicon solar cell. The paste is prepared from, by weight, 80-92% of silver powder, 1-4% of glass powder, 0.1-5% of additives and 3-12% of an organic carrier. According to the electrode paste for the buried-gate type crystalline silicon solar cell, for the defect that existing paste cannot be applicable to grooved buried-gate electrodes, by adjusting components and proportioning of the paste, the viscosity and surface tension of the paste are effectively lowered, and filling of an electrode tank can be achieved in a screen printing mode.

Description

technical field [0001] The invention relates to an electrode paste, in particular to an electrode paste for a buried gate type crystalline silicon solar cell. Background technique [0002] At present, the development of solar cell technology is changing with each passing day. The industrialization of various new technologies has continuously refreshed the efficiency level of industrial production of solar cells, thereby continuously reducing the cost of photovoltaic power generation and greatly promoting the popularization of photovoltaic power generation. Among many high-efficiency battery technologies, the trench-buried gate technology has attracted widespread attention since it was proposed in the 1980s. Many research institutions and scientists have studied it, but so far, the trench-buried The grid technology has not been industrialized. The reason is that its electrodes are realized by electroless plating or electroplating. The electrodes made by electroless plating an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01L31/0224
CPCH01B1/22H01L31/022425Y02E10/50
Inventor 顾生刚佟丽国张小芳祝聪
Owner 北京市合众创能光电技术有限公司
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