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Preparation method of solar cell with elimination of printing wave line

A solar cell, wave pattern technology, applied in printing, circuits, printing devices, etc., can solve problems such as affecting the appearance quality of batteries, and achieve the effect of simple operation and easy industrialization

Inactive Publication Date: 2012-05-02
百力达太阳能股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The printing quality of the positive electrode has a great influence on the appearance quality of the battery. In the normal production process, the appearance of the printed grid line of the positive electrode often appears similar to wavy stripes, which seriously affects the appearance of the battery. Appearance Quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The invention provides a method for preparing a solar cell that eliminates printing waves, the steps of which are:

[0024] a. Surface texturing

[0025] The incoming monocrystalline silicon wafers are inserted into the textured flower basket along the cutting mark downward, and then the silicon wafers loaded into the flower basket are pre-cleaned. The pre-cleaning adopts ultrasonic waves and adds a certain amount of cleaning and decontaminating agent. Afterwards, the silicon wafer was placed in a sodium hydroxide solution with a temperature of 75°C and a mass percent concentration of 2% for surface texturing, and an appropriate amount of texturing catalyst was added to form a uniform texture on the surface of the silicon wafer with a crystal orientation. The "pyramid" suede structure with a consistent size of 1-3um makes the surface have a good light trapping effect.

[0026] b. Diffusion

[0027] Insert the textured silicon wafer into the quartz boat along the cutt...

Embodiment 2

[0037] The difference between this example and Example 1 is that in step a, the silicon wafer is placed in a sodium hydroxide solution with a temperature of 80° C. and a concentration of 1% by mass to perform a surface texturing process. In step g, a screen printing screen is used to print the back electrode paste and then the back electric field paste on the back, and then dry them at a temperature of 200° C. respectively. The printed silicon wafers are sent to the sintering furnace, and after being dried at a temperature of about 250°C, the silicon wafers are transported into an atmosphere with a surface temperature ranging from 500°C to 800°C for sintering. Other steps are with embodiment 1.

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PUM

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Abstract

The invention relates to a preparation method of a solar cell with elimination of a printing wave line. The method is characterized in that the method comprises the following steps that: a silicon wafer is inserted into a petal basket along the downward direction of a cutting trace of the silicon wafer; the monocrystalline silicon wafer is provided and surface texturing is carried out; the processed silicon wafer is inserted into a quartz boat along the downward direction of the cutting trace of the silicon wafer; a diffusion layer is formed on the surface of the silicon wafer that has been processed by texturing; the diffused silicon wafer is placed in a bearing box along a certain direction; etching is carried out to remove PN nodes around the silicon wafer as well as the etched silicon wafer is inserted into the petal basket along the downward direction of the cutting trace of the silicon wafer; pickling is carried out to remove phosphosilicate glass; a passivation and antireflection layer is manufactured; and the silicon wafer that has been processed by film coating is placed in a to-be-printed bearing box along a certain direction, so that after printing, a fine grid line direction is vertical to a cutting line direction; and a cell back side slurry and a right side slurry are successively printed as well as sintering is carried out to form a back side Ag electrode, a back side aluminium back surface field and a right side Ag electrode. According to the invention, the method can be operated simply and conveniently; and compared with a traditional production mode, the industrialized production mode enables no extra production cost to be generated.

Description

technical field [0001] The invention relates to a method for manufacturing a semiconductor element, in particular to a method for preparing a solar cell that eliminates printing ripples, and belongs to the technical field of solar cell production. Background technique [0002] With the continuous development of solar cell production technology, the industry's requirements for battery quality are also constantly improving, not only reflected in the electrical performance of the battery, but also have higher requirements for the appearance of the battery. In the process of making solar cells, screen printing is an extremely important process. The positive electrode, the back electrode and the back electric field are printed on the front and back of the battery by screen printing. The printing quality of the positive electrode has a great influence on the appearance quality of the battery. In the normal production process, the appearance of the printed grid line of the positive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18B41M1/12
CPCY02P70/50
Inventor 梅建飞石劲超
Owner 百力达太阳能股份有限公司
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