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Glass composite for back surface field aluminum paste of solar battery and preparation method thereof

A glass composition and a technology for solar cells, applied in the field of glass composition for solar cell back field aluminum paste and its preparation, can solve problems such as environmental and human harm, and achieve elimination of lead pollution, low warpage, and cell conversion efficiency. high effect

Inactive Publication Date: 2010-12-15
CHANGZHOU YINGDE ENERGY TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the preparation process of the back field aluminum paste of solar cells in the prior art, due to the good low melting property of the lead glass and its good wettability to the silicon wafer and aluminum powder, the lead glass is widely used, wherein the lead content is as high as 70%. The above will inevitably cause great harm to the environment and human body

Method used

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  • Glass composite for back surface field aluminum paste of solar battery and preparation method thereof
  • Glass composite for back surface field aluminum paste of solar battery and preparation method thereof
  • Glass composite for back surface field aluminum paste of solar battery and preparation method thereof

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preparation example Construction

[0031] The content of the glass composition (glass bonding phase) in the back field aluminum paste of the present embodiment is 1-3%, preferably 1-2.5%, and its preparation method is as follows figure 1 shown, including the following steps:

[0032] S101, filling each component into a ceramic crucible according to the mass ratio;

[0033] Wherein, the mass ratio of each composition is as follows: Bi 2 o 3 , 65-75%; SiO 2 , 5-10%; B 2 o 3 , 6-8%; Al 2 o 3 , 0-2%; ZnO, 8-10%; CaO 0-2%; modification additive, 0-2%; as described in the above examples, the modification additive here includes TiO 2 , ZrO 2 , V 2 o 5 , CaF and other components.

[0034] S102, putting the ceramic crucible into a high-temperature sintering furnace for melting;

[0035] The specific smelting conditions can be smelting at 1200-1300°C for 1-2 hours.

[0036] S103, pouring the smelted and clarified molten glass into deionized water for quenching;

[0037] S104, putting the quenched glass frag...

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Abstract

The invention relates to a glass composite for back surface field aluminum paste of a solar battery, which is Bi-Si-B system glass of non-lead systems and comprises Bi2O3, SiO2, Al2O3, ZnO, B2O3 and CaO, and a modified additive comprises TiO2, ZrO2, V2O5, CaF, etc. The invention also relates to a method for preparing the glass composite for the back surface field aluminum paste of the solar battery. In the technical scheme of the invention, the provided glass composite for the back surface field aluminum paste of the solar battery utilizes the Bi-Si-B system glass of non-lead systems, thereby eliminating lead pollution in the glass composite, meanwhile, the glass composite has low-melting property equivalent to that of lead glass and good immersion property to silicon slices and aluminite powder, so that the prepared back surface field aluminum paste can form excellent ohmic contact with the silicon slices, has good performances of high adhesion force, low wrapping of battery plates and high battery conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of thick-film electronic paste compositions, in particular to a glass composition for solar cell back field aluminum paste and a preparation method thereof. Background technique [0002] Theoretically, the highest photoelectric conversion efficiency of monocrystalline silicon solar cells is 30%, and the highest efficiency of polycrystalline silicon solar cells is 24%. At present, the maximum conversion efficiency of monocrystalline silicon solar cells has been greatly improved in the laboratory, which is 24.7%, which is close to the maximum efficiency value. However, due to the existence of many grain boundaries in polycrystalline silicon solar cells, the recombination centers formed by these grain boundaries cause the photovoltaic conversion efficiency of polycrystalline silicon to be far lower than that of single crystal silicon, and the photoelectric conversion efficiency is 19.8%. The efficiency of indu...

Claims

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Application Information

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IPC IPC(8): C03C3/066C03C8/24
Inventor 屠涵春戈晨
Owner CHANGZHOU YINGDE ENERGY TECH
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