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Halogenide containing glasses in metallization pastes for silicon solar cells

A technology of solar cells and silicon oxides, applied to conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., can solve problems such as inefficiency, high temperature, and production of solar cells

Inactive Publication Date: 2018-11-23
HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the temperature required for firing the silver paste disclosed in WO 2013 / 105812 A1 is still too high to produce solar cells with sufficient efficiency

Method used

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  • Halogenide containing glasses in metallization pastes for silicon solar cells
  • Halogenide containing glasses in metallization pastes for silicon solar cells
  • Halogenide containing glasses in metallization pastes for silicon solar cells

Examples

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Embodiment Construction

[0069] Contribution to achieving at least one of the above objects is made by: a slurry comprising:

[0070] i) silver particles;

[0071] ii) Particulate lead-silicate glass comprising

[0072] iia) at least one silicon oxide;

[0073] iib) at least one lead oxide;

[0074] iic) at least one chloride;

[0075] iid) optionally at least one other oxide different from components iia) and iib);

[0076] iii) Organic vehicles.

[0077] It has been surprisingly found that the incorporation of halides into lead-silicate glasses known from the prior art results in glasses which, when used as components in silver pastes, significantly reduce the firing temperature. The use of these slurries to form electrodes on the front and / or back sides of Si wafers enables the formation of solar cells characterized by excellent efficiencies.

[0078] Silver particles i)

[0079] The silver particles i) present in the paste according to the invention impart metallic conductivity to the so...

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Abstract

In general, the invention relates to a paste comprising : i) silver particles; ii) a particulate lead-silicate glass comprising iia) at least one oxide of silicon; iib) at least one oxide of lead; iic) at least one chloride; iid) optionally at least one further oxide being different from components iia) and iib); iii) an organic vehicle. The invention also relates to a solar cell precursor, to a process for the preparation of a solar cell, to a solar cell obtainable by this process, to a module comprising such a solar cell and to the use of a particulate lead-silicate glass as a component in asilver paste that can be used for the formation of an electrode.

Description

technical field [0001] In general, the present invention relates to a paste, a solar cell precursor, a method for preparing a solar cell, a solar cell obtainable by this method, a module comprising such a solar cell And the use of particulate lead-silicate glass as a component in silver pastes that can be used to form electrodes. Background technique [0002] A solar cell is a device that converts light energy into electricity using the photovoltaic effect. Solar energy is an attractive green energy source because it is sustainable and produces only non-polluting by-products. Therefore, a great deal of research is currently being conducted to develop solar cells with increased efficiency while continuously reducing material and manufacturing costs. When light strikes a solar cell, a portion of the incident light is reflected by the surface and the rest is transmitted into the solar cell. The transmitted photons are absorbed by the solar cell, which is usually made of a se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/074C03C8/06C03C8/16C03C8/18H01B1/22H01L31/0224
CPCC03C3/0745C03C8/06C03C8/16H01B1/22H01L31/022425H01L31/02168C03C8/18Y02E10/547H01L31/02167H01L31/022441H01L31/0682H01L31/1864
Inventor G·舒尔茨R·梅伯里D·W·霍兹曼C·荣格M·霍里特斯G·贝鲁比
Owner HERAEUS PRECIOUS METALS NORTH AMERICA CONSHOHOCKEN
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