Transparent conductive paste, transparent grid line and solar cell

A transparent conductive and paste technology, applied in the field of solar cells, can solve the problems of increasing the series resistance of solar cells, reducing the conversion efficiency of solar cells, and adversely reducing the cost of solar cells, and achieves good current collection effect, large width and thickness, and cost. reduced effect

Pending Publication Date: 2020-06-16
鸿翌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both silver paste and aluminum paste are opaque, and the light will be blocked in the printed grid line area, resulting in a decrease in the efficiency of solar cells
In order to reduce the shading area of ​​the grid wire electrode, the grid wire is required to be as thin as possible, but this will lead to an increase in the series resistance of the solar cell, which greatly reduces the conversion efficiency of the solar cell
In addition, because the price of silver paste is relatively expensive, it is an important part of the production cost of solar cells, which is not conducive to the reduction of the cost of solar cell power generation.

Method used

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  • Transparent conductive paste, transparent grid line and solar cell
  • Transparent conductive paste, transparent grid line and solar cell

Examples

Experimental program
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Effect test

preparation example Construction

[0041] According to another aspect of the present invention, there is provided a method for preparing the above-mentioned transparent conductive paste, comprising the following steps:

[0042] The raw materials for preparing the transparent conductive paste are mixed according to the proportion, dispersed and filtered to obtain the transparent conductive paste.

[0043] Dispersion can be carried out, for example, in the range of 20-30°C, for example, at room temperature, and the dispersion time can be 10 min, 15 min, 20 min, etc. Filtration can be performed, for example, with a filter, and the filter can be 100 mesh, 200 mesh, or 300 mesh.

[0044] According to another aspect of the present invention, a transparent grid line is provided, and the transparent grid line is obtained by curing the transparent conductive paste of the present invention.

[0045] "Curing" in the present invention refers to the process of changing the transparent conductive paste from non-solid to sol...

Embodiment approach

[0062] According to one embodiment of the present invention, the solar cell is a solar cell sheet.

[0063] The technical solutions of the present invention will be further explained and described below in conjunction with specific embodiments.

[0064] Embodiment 1~6 transparent conductive paste

[0065] Each component and its content of Examples 1-6 are shown in Table 1.

[0066] The preparation method is as follows:

[0067] The components were mixed according to the contents listed in Table 1, dispersed at room temperature for 10 minutes, and filtered through a 200-mesh filter to obtain transparent conductive pastes of various examples.

[0068] Each component and its content (parts by weight) in the embodiment of table 1

[0069]

[0070]

Embodiment A

[0076] The preparation method of the front grid lines of Examples A~C and Comparative Examples A~C is:

[0077] S101: printing the transparent conductive paste on the surface of the solar cell substrate with a screen printing machine;

[0078] S102: Slowly raise the temperature of the substrate printed with the paste from room temperature to 40° C. in argon gas, keep it for 15 minutes, remove moisture and set the shape.

[0079] S103: Fill the high temperature furnace with 10vt% H 2 Argon, heated to 700°C for 1.5 minutes.

[0080] S104: cooling down to room temperature at a cooling rate of 5° C. / min to form front grid lines of the solar cells.

[0081] In Example D, in step S102, the temperature was slowly raised from room temperature to 60°C, and kept for 5 minutes; in step S103, the temperature was heated to 800°C, and the heating time was 1.2 minutes. Others were the same as in Example A.

[0082] In Example E, the temperature was heated to 800° C. in step S103 for 1.2 m...

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Abstract

The invention belongs to the technical field of solar cells and relates to transparent conductive paste, a transparent grid line and a solar cell. The transparent conductive paste comprises the following materials in parts by weight: 1-3 parts of silver nanowires; 1-4 parts of nano zinc oxide; 1-2 parts of nano tin oxide; 2-6 parts of nano indium oxide; 5-10 parts of a surface wetting agent; 5-10parts of a dispersing agent; 0.5-1.5 parts of polymer resin; 1-2 parts of a thickening agent; 15-40 parts of an organic solvent; and 5-50 parts of water. The grid line of the solar cell obtained by the transparent conductive paste is transparent and does not block the light of the cell, so that the efficiency of the solar cell can be improved. Compared with the cost of a traditional silver grid line, the cost of the transparent grid line is reduced.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a transparent conductive paste, a transparent grid line and a solar cell. Background technique [0002] At present, the current collection of solar cells, especially silicon solar cells, is mainly done by printed grid lines. Usually, screen-printed silver paste is used as the front grid line material, and screen-printed aluminum paste is used as the rear grid line material. However, both the silver paste and the aluminum paste are opaque, and light will be blocked in the area of ​​the printed grid line, resulting in a decrease in the efficiency of the solar cell. In order to reduce the shading area of ​​the grid wire electrode, the grid wire is required to be as thin as possible, but this will increase the series resistance of the solar cell and greatly reduce the conversion efficiency of the solar cell. In addition, since the price of silver paste is relatively expensive, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 王涛霍艳寅代凤玉
Owner 鸿翌科技有限公司
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