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Graphite boat saturation technology of solar cell

A technology of solar cells and graphite boats, applied in the field of solar cells, can solve the problems of large color difference and short service life of graphite boats, and achieve the effects of improving the quality rate, good color consistency and reducing costs.

Inactive Publication Date: 2018-06-01
江苏彩虹永能新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The graphite boat saturation method in the industry is a traditional saturation process. The service life of the graphite boat after saturation with this process is short. After cleaning, the color difference of the first five boats after the saturation of the new boat is relatively large, mainly because the large color difference within the chip exists on the edge of the silicon wafer. The appearance of the light red center is bad, and the proportion of bad appearance is as high as 80%

Method used

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  • Graphite boat saturation technology of solar cell
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  • Graphite boat saturation technology of solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The invention provides a graphite boat saturation process of a solar cell, comprising the steps of:

[0022] S1. Removing the silicon nitride layer: use 15% hydrofluoric acid solution to remove the silicon nitride layer coated on the graphite boat, and the cleaning time is 4 hours;

[0023] S2. Rinsing: Use pure water to rinse the graphite boat, rinse 4 times for 8 hours and spray for each rinse, rinse for 1 hour for the first time, rinse for 2 hours for the second time, rinse for 2 hours for the third time, and rinse for the third time Rinse for 3 hours;

[0024] S3. Drying: Dry the cleaned graphite boat in an oven, the drying temperature is 100 degrees, and the drying time is set for 8 hours;

[0025] S4. Assembling: Assemble the graphite boat and install the stuck point protection component. Cover the graphite boat stuck point with the inner diameter of the ceramic stuck point protection component. In this way, all graphite stuck points 1 are protected, and the cera...

Embodiment 2

[0029] The invention provides a graphite boat saturation process of a solar cell, comprising the steps of:

[0030] S1. Removing the silicon nitride layer: use 15% hydrofluoric acid solution to remove the silicon nitride layer coated on the graphite boat, and the cleaning time is 4 hours;

[0031] S2. Rinsing: Use pure water to rinse the graphite boat, rinse 4 times for 8 hours and spray for each rinse, rinse for 1 hour for the first time, rinse for 2 hours for the second time, rinse for 2 hours for the third time, and rinse for the third time Rinse for 3 hours;

[0032] S3. Drying: Dry the cleaned graphite boat in an oven, the drying temperature is 100 degrees, and the drying time is set for 8 hours;

[0033] S4. Assembling: Assemble the graphite boat and install the stuck point protection component. Cover the graphite boat stuck point with the inner diameter of the ceramic stuck point protection component. In this way, all graphite stuck points 1 are protected, and the cera...

Embodiment 3

[0039] The invention provides a graphite boat saturation process of a solar cell, comprising the steps of:

[0040] S1. Removing the silicon nitride layer: use 15% hydrofluoric acid solution to remove the silicon nitride layer coated on the graphite boat, and the cleaning time is 4 hours;

[0041] S2. Rinsing: Use pure water to rinse the graphite boat, rinse 4 times for 8 hours and spray for each rinse, rinse for 1 hour for the first time, rinse for 2 hours for the second time, rinse for 2 hours for the third time, and rinse for the third time Rinse for 3 hours;

[0042] S3. Drying: Dry the cleaned graphite boat in an oven, the drying temperature is 100 degrees, and the drying time is set for 8 hours;

[0043] S4. Assembling: Assemble the graphite boat and install the stuck point protection component. Cover the graphite boat stuck point with the inner diameter of the ceramic stuck point protection component. According to this method, all graphite stuck points 1 are protected,...

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Abstract

The present invention discloses a graphite boat saturation technology of a solar cell. The graphite boat saturation technology comprises the steps of removing a silicon nitride layer, rinsing, drying,assembling, saturating a graphite boat, saturating the graphite boat again and plating a film. According to the graphite boat saturation technology of the solar cell, by installing a card point protection assembly, a graphite boat card is protected. By firstly carrying out the long-time silicon nitride layer saturation on a graphite boat slice and then carrying out the secondary boat plating saturation after the disassembly on the card point protection assembly, and by combining two saturation modes to saturate the graphite boat slice fully, the influence of partial silicon nitride plated film of a card point on the color of the cell during the long-time saturation process is avoided, the color of the plated film of a silicon slice is more uniform, the single slice does not have the chromatic aberration, and the color consistency of the plated film is improved, thereby substantially improving the qualified rate of the finished cell.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a graphite boat saturation process for solar cells. Background technique [0002] At present, the process of polycrystalline silicon solar cells has become increasingly mature and standardized production has been achieved. The main process steps are as follows: acid corrosion texturing→diffusion junction→wet etching→PECVD anti-reflection coating→screen printing→sintering→testing and sorting. Among them, the PECVD coating process plays a decisive role in the color appearance of the solar cell, and the saturation quality of the graphite boat directly affects the uniformity of the coating color. The graphite boat saturation method in the industry is a traditional saturation process. The service life of the graphite boat after saturation with this process is short. After cleaning, the color difference of the first five boats after the saturation of the new boat is rel...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCH01L31/1876Y02E10/50Y02P70/50
Inventor 常宇峰缪强宛正
Owner 江苏彩虹永能新能源有限公司
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