Method for manufacturing solar cell electrode

A technology for solar cells and electrodes, applied in the field of solar cells, can solve the problems of low conductivity of nickel, high cost of silver powder, increase in cost, etc., and achieve the effects of overcoming easy oxidation, improving production efficiency, and reducing costs

Active Publication Date: 2017-03-29
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to use silver paste as a raw material, which usually contains silver powder, glass powder and organic vehicle, wherein the cost of silver powder is extremely high, which leads to a corresponding increase in the cost of the process
In addition, there are also some problems in screen printing other cheap metals, for example, screen printing copper has the defect of easy oxidation during high temperature sintering, while screen printing nickel has the defect of low conductivity

Method used

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  • Method for manufacturing solar cell electrode

Examples

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Effect test

Embodiment 1

[0035] This embodiment is used to illustrate the method for manufacturing solar cell electrodes provided by the present invention.

[0036] Concentration is that the stannous octoate aqueous solution of 2% by weight is spray-coated to the solar cell silicon wafer (the specification is: 156cm 2 ×156cm 2 , with a thickness of 180 μm, the same below), and then baked in an oven at 80° C. for 30 minutes. Then cover the mask on the surface of the solar cell silicon wafer, the mask includes a light-transmitting area and an opaque area and the pattern of the light-transmitting area is an electrode pattern, and then UV exposure is carried out, and the exposure energy is 2000mj / cm 2 , wherein, since the pattern of the light-transmitting region of the mask is an electrode pattern, the UV-exposed part is an electrode pattern. Afterwards, the mask is removed, and the solar cell silicon wafer treated by UV exposure is treated with a temperature of 15° C. to develop a liquid solution (the ...

Embodiment 2

[0043] This embodiment is used to illustrate the method for manufacturing solar cell electrodes provided by the present invention.

[0044] An aqueous solution of titanium acetylacetonate with a concentration of 8% by weight was sprayed onto the surface of the solar cell silicon wafer, and then baked in an oven at 140° C. for 10 minutes. Then cover the mask on the surface of the solar cell silicon wafer, the mask includes a light-transmitting area and an opaque area and the pattern of the light-transmitting area is an electrode pattern, and then UV exposure is carried out, and the exposure energy is 1500mj / cm 2 , wherein, since the pattern of the light-transmitting region of the mask is an electrode pattern, the UV-exposed part is an electrode pattern. After that, the mask is removed, and the solar cell silicon wafer treated by UV exposure is soaked for 60 seconds in a developing solution (the developing solution is a mixture of ethanol and methanol in a weight ratio of 1:1) a...

Embodiment 3

[0051] This embodiment is used to illustrate the method for manufacturing solar cell electrodes provided by the present invention.

[0052] The concentration is 15% by weight of aluminum (trihydroxybutanone) 3 The aqueous solution is sprayed onto the surface of the silicon wafer of the solar cell, and then baked in an oven at 80° C. for 30 minutes. Then cover the mask on the surface of the solar cell silicon wafer, the mask includes a light-transmitting area and an opaque area and the pattern of the light-transmitting area is an electrode pattern, and then UV exposure is carried out, and the exposure energy is 700mj / cm 2 , wherein, since the pattern of the light-transmitting region of the mask is an electrode pattern, the UV-exposed part is an electrode pattern. Afterwards, the mask is removed, and the solar cell silicon wafer treated by UV exposure is soaked in 60° C. developing solution (the developing solution is a tetramethylammonium hydroxide aqueous solution with a conc...

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Abstract

The invention relates to the field of a solar cell, and discloses a method for manufacturing a solar cell electrode. The method comprises the following steps of (1) coating the surface of a solar cell silicon wafer with metal slurry containing a transitional metal complex; (2) performing optical curing on a region, where an electrode needs to be formed, on the surface of the solar cell silicon wafer coated with the metal slurry, so as to enable the metal slurry on the region to be subjected to an optical curing reaction; (3) immersing the optically-cured solar cell silicon wafer by a developing medicinal liquid to dissolve the metal slurry on the non-optically-cured region in the developing medicinal liquid to form an electrode pattern; and (4) performing high-temperature sintering on the product obtained in the step (3), and carrying out surface activation and surface metallization on the electrode pattern in sequence. By adoption of the method provided by the invention, the cost is greatly lowered, the production efficiency is improved, and the photoelectric conversion efficiency of a solar cell corresponding to the obtained solar cell electrode is relatively high.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for making solar cell electrodes. Background technique [0002] Due to the gradual depletion of fossil energy sources, new energy sources such as solar energy and wind energy are gradually emerging. As a device that directly converts light energy into electrical energy through photoelectric effect or photochemical effect, solar cells have the advantages of various installation forms, safety and pollution-free, inexhaustible and inexhaustible, so they have been vigorously developed. The solar cell silicon wafer contains a PN junction, which can generate current under light. In order to export the current, it is necessary to make positive and negative electrodes on the surface of the solar cell silicon wafer. [0003] At present, the production method of the positive and negative electrodes of solar cells is usually to print silver paste on the front and back sides of the solar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0224
CPCH01L31/022425H01L31/18Y02E10/50
Inventor 冷世伟林宏业韦家亮
Owner BYD CO LTD
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