PERC solar cell light-injection induced regeneration process and equipment

A technology of solar cells and regeneration equipment, applied in the field of solar cells, can solve the problems of low cell efficiency, minority carrier attenuation, slow rate of H passivation, etc., and achieve the effect of reducing maintenance times, reducing labor, and reducing recombination rate

Active Publication Date: 2019-10-15
ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. The theory of boron-oxygen defect states, boron-oxygen defects are very easy to capture minority carriers and cause attenuation
[0004] Prior art, such as CN104538500B "A PECVD coating and sintering process for anti-LID and PID of crystalline silicon solar cells", which discloses the use of LID with a fur

Method used

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  • PERC solar cell light-injection induced regeneration process and equipment
  • PERC solar cell light-injection induced regeneration process and equipment
  • PERC solar cell light-injection induced regeneration process and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (1) Put the sintered PERC cell into the photoregeneration equipment, and move it through the conveyor belt at a speed of 6m / min;

[0072] (2) After the sintered PERC cell is subjected to the first light treatment in the first area, the power of the LED light group in the first area is 87%, the minimum light intensity of the LED light group is 100% power is not less than 18suns, and the temperature is controlled at 295 ℃;

[0073] (3) After the first light treatment, the PERC cells are subjected to the second light treatment in the second area. The power of the LED light group in the second area is 95%, and the minimum light intensity of the LED light group at 100% power is not less than 18suns, the temperature is controlled at 235°C;

[0074] (4) After the second light treatment, the PERC cells are subjected to the third light treatment in the third area. The power of the LED light group in the third area is 95%, and the minimum light intensity of the LED light group a...

Embodiment 2

[0078] (1) Put the sintered PERC cells into the photoregeneration equipment, and move at a speed of 5.8m / min through the conveyor belt;

[0079] (2) After the sintered PERC cells are subjected to the first light treatment in the first area, the power of the LED light group in the first area is 83%, the minimum light intensity of the LED light group is 100% power is not less than 18suns, and the temperature is controlled at 295 ℃;

[0080] (3) After the first light treatment, the PERC cells are subjected to the second light treatment in the second area. The power of the LED lamp group in the second area is 87%, and the minimum light intensity of the LED light group at 100% power is not less than 18suns, the temperature is controlled at 235°C;

[0081] (4) After the second light treatment, the PERC cells are subjected to the third light treatment in the third area. The power of the LED light group in the third area is 90%, and the minimum light intensity of the LED light group ...

Embodiment 3

[0085] (1) Put the sintered PERC cell into the photoregeneration equipment, and move it through the conveyor belt at a speed of 5.7m / min;

[0086] (2) After the sintered PERC cells are subjected to the first light treatment in the first area, the power of the LED light group in the first area is 85%, the minimum light intensity of the LED light group is 100% power is not less than 22suns, and the temperature is controlled at 290 ℃;

[0087] (3) After the first light treatment, the PERC cells are subjected to the second light treatment in the second area. The power of the LED light group in the second area is 90%, and the minimum light intensity of the LED light group is 100% power is not less than 22suns, the temperature is controlled at 238°C;

[0088] (4) After the second light treatment, the PERC cells are subjected to the third light treatment in the third area. The power of the LED lamp group in the third area is 91%, and the minimum light intensity of the LED light grou...

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Abstract

The invention discloses PERC solar cell light-injection induced regeneration equipment, which comprises a first region, a second region, a third region and a fourth region, wherein the first region, the second region and the third region respectively comprise an LED lamp group and a hot air outlet; and the fourth region comprises a hot air outlet and a cooling water plate. The LED lamp group in each region is controlled independently; light intensity is not less than 18 suns at least when the power of the LED lamp group in each region is 100%; the power of the LED lamp group in the first region is smaller than the power of the LED lamp groups in the second region and in the third region; and the temperature of the first region is higher than that of the second region and the third region.Correspondingly, the invention also discloses a PERC solar cell light-injection induced regeneration process. The PERC solar cell light-injection induced regeneration process and equipment can effectively passivate the boron oxygen defect state in a solar cell and make the cell piece reach a new stable state, thereby making CID reduce by 0.1%-0.8% under the condition where efficiency reduction isless than 0.05%.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a photoregeneration process and equipment for PERC solar cells. Background technique [0002] Current Injection Degradation (CID) refers to the power attenuation phenomenon caused by the process of carrier injection of solar cells and components. Such carrier-induced degradation specifically limits the performance of PERC cells, as PERC cells are now market-dominating, and thus CID is gaining more and more attention in the photovoltaic circle. At present, the standards and monitoring of CID have not yet been formulated and implemented in the industry; the academic circles have not yet reached a consensus on the reasons for CID. Stuart of South Wales proposed that after high-temperature sintering, the interstitial hydrogen atoms (B1) cooled rapidly and combined with B to form H-B (B2). 2. The theory of metal dissolution and dispersion. Metal precipitation disperses to form interstitia...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCH01L31/1804Y02E10/547Y02P70/50
Inventor 王利彦吕锦滇林纲正张欣
Owner ZHEJIANG AIKO SOLAR ENERGY TECH CO LTD
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