Glass powder for preparing solar cell electrode, as well as paste composition, solar cell electrode and solar cell including same

A technology of solar cells and glass powder, which is applied in the direction of conductive materials dispersed in non-conductive inorganic materials, circuits, photovoltaic power generation, etc., which can solve the problems of insufficient adhesion between solar cell electrodes and welding ribbons, high series resistance and conversion efficiency, Solve problems such as low adhesion of electrodes and ribbons, achieve the effect of providing conversion efficiency, excellent adhesive strength, and reducing adverse effects

Active Publication Date: 2018-04-06
DK ELECTRONICS MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to provide a glass frit for preparing solar cell electrodes, a paste composition including the same, solar cell electrodes and solar cells, so as to solve the insufficient adhesion between solar cell electrodes and welding strips in the prior art , low adhesion between electrodes and ribbons can lead to technical problems of high series resistance and degradation of conversion efficiency

Method used

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  • Glass powder for preparing solar cell electrode, as well as paste composition, solar cell electrode and solar cell including same
  • Glass powder for preparing solar cell electrode, as well as paste composition, solar cell electrode and solar cell including same

Examples

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Embodiment approach

[0034] According to a typical embodiment of the present invention, the solar cell electrode components include silver powder, sodium tellurite-trilead tetroxide-based glass powder and an organic vehicle. Now, the composition of the solar cell electrode of the present invention will be described in more detail.

[0035] (A) silver powder

[0036] According to a typical embodiment of the present invention, the paste composition for preparing solar cell electrodes contains silver powder as the conductive powder. The particle size of silver powder can be nano or micron. For example, silver powder may have a particle size of tens to hundreds of nanometers, or several to tens of microns. Alternatively, the silver powder may be a mixture of two or more silver powders having different particle sizes.

[0037] Silver powder can have a spherical, flake or amorphous shape.

[0038] The silver powder preferably has an average particle diameter (D50) of about 0.1 μm to about 10 μm, mor...

Embodiment 1～12 and comparative example 1～16

[0063] Examples 1-12 and Comparative Examples 1-16 adopted the composition of the glass frit shown in Table 1, prepared compositions for solar cell electrodes in the same manner, and evaluated the physical properties. It should be noted that the examples and comparative examples in Table 1 are intended to highlight the characteristics of one or more inventive examples, not to limit the scope of the present invention, nor to illustrate that the comparative examples are outside the scope of the present invention. Furthermore, the inventive subject matter is not limited to the specific details described in the examples and comparative examples.

[0064] Table 1

[0065]

[0066] As shown in Table 1, using the compositions prepared by using sodium tellurite pentahydrate and trilead tetroxide in Examples 1 to 12, and the components of the composition are within the preferred range of the present invention, the solar cells manufactured electrode, showing high adhesive strength and...

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Abstract

The invention discloses glass powder for preparing a solar cell electrode, as well as a paste composition, a solar cell electrode and a solar cell including same. The glass powder comprises sodium tellurite pentahydrate and lead tetraoxide. The glass powder has a relatively high eutectic point due to lead tetraoxide-sodium tellurite, and can provide a certain space to control of the reactivity between the glass powder and silicon nitride; the composite compound Na element in Na2TeO3 can form an Ag-Na anionic complex, and can be used for promoting liquid-phase sintering of Ag particles in the sintering process. Therefore, the lead tetraoxide-sodium tellurite composition can provide stable reactivity with silicon nitride, and enables a solar cell to have excellent and stable contact resistance. The solar cell electrode prepared by applying the paste composition has excellent adhesive strength, and enables series resistor (Rs) to be minimized, so that high conversion efficiency can be provided.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a glass powder for preparing solar cell electrodes, a paste composition comprising the same, a solar cell electrode and a solar cell. Background technique [0002] Solar cells use the photovoltaic effect to convert photons of sunlight through a p-n junction to generate electricity. In a solar cell, front and rear electrodes are respectively formed on the upper and lower surfaces of a semiconductor wafer or substrate having a p-n junction. Then, the photoelectric effect of the p-n junction is induced by sunlight entering the semiconductor wafer, and the electrons generated by the photoelectric effect of the p-n junction provide current to the outside through the electrodes. The electrode composition is arranged on the wafer, and then patterned and baked to form the electrode of the solar cell. [0003] Increasing the efficiency of solar cells by continuously red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00H01B1/22H01L31/0224
CPCC03C12/00H01B1/22H01L31/022425Y02E10/50
Inventor 崔永郁
Owner DK ELECTRONICS MATERIALS INC
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