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Lead-free glass powder for solar cell aluminum paste and preparation method thereof

A technology of solar cells and lead-free glass powder, applied in the field of solar conductive paste, can solve problems such as unfavorable environment and damage, and achieve the effects of large processing capacity, improved production efficiency and strong adhesion

Inactive Publication Date: 2016-02-10
NINGBO GUANGBO NEW NANOMATERIALS STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to pursue a low softening point, these series of glass powders usually contain Pb element which is harmful to the environment. This element is not good for the environment. If a person accidentally inhales a certain amount of Pb, it will cause great harm to the body.

Method used

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  • Lead-free glass powder for solar cell aluminum paste and preparation method thereof
  • Lead-free glass powder for solar cell aluminum paste and preparation method thereof

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Embodiment

[0026] The percentage by weight of the glass frit raw material used in the present invention in the total glass composition is listed in Table 1, wherein the zinc compound and bismuth compound are also listed in the table.

[0027] Table 1

[0028]

[0029] According to the technical scheme for preparing glass powder adopted in the present invention, each component glass material is accurately weighed and mixed in a mortar according to the requirements of the formula, and the well-mixed raw materials are put into a mold and pressed into a small cylindrical shape. The height of the cylinder is 2-4cm, and the weight is 30-60g. Put the pressed block raw materials into a drying oven that can circulate and ventilate. The drying temperature is controlled at 200-350°C for 30 minutes. This process is equivalent to giving glass The material is pre-fired, and part of the water is evaporated at the same time.

[0030] In the preparation method of the present invention, in order to re...

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Abstract

The invention discloses a lead-free glass powder used for solar cell aluminum paste. The lead-free glass powder is characterized by mainly comprising the following components by weight percent: 8-20% of SiO2, 2-8% of Al2O3, 10-15% of B2O3, 0-2% of P2O5 or V2O5 0.1-1.5% of BaCO3, and 60-70% of a zinc compound and a bismuth compound. The glass powder disclosed by the invention can facilitate the sintering of electric conduction aluminite powder, is beneficial to the formation of a BSF (Back Surface Field), reduces the ohmic contact and increases open-circuit voltage.

Description

technical field [0001] The invention belongs to the technical field of solar conductive paste, and relates to a lead-free glass powder used for solar cell aluminum paste and a preparation method thereof. Background technique [0002] Solar photovoltaic power generation has become the fastest and largest industry in the field of renewable energy after wind power generation. At present, solar cells in photovoltaic power generation are still dominated by crystalline silicon solar cells, with a market share of more than 95%. The efficiency of monocrystalline silicon solar cells in laboratories can reach more than 24%, and mass commercial production in the market can also reach 19%. . As the back electric field of the battery, the aluminum paste plays a very important role in increasing the open circuit voltage and short circuit current of the battery, thereby improving the photoelectric conversion efficiency of the battery. The aluminum paste is covered on the back of the sili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C12/00
Inventor 宋财根程遵义邓巨富吕重天
Owner NINGBO GUANGBO NEW NANOMATERIALS STOCK
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