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Aluminium oxide slurry for surface passivation for crystalline silicon solar cell and preparation method for passivating film

A solar cell and alumina technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of trimethylaluminum inflammability and explosion, high equipment cost, and high risk, and achieve easy mass production and process The process is simple and the effect of improving conversion efficiency

Inactive Publication Date: 2016-04-13
何晨旭 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these equipment deposition methods have the following defects: 1. High equipment cost; 2. Low operating rate; 3. High maintenance costs; 4. The deposition gas trimethylaluminum is flammable and explosive, and is very dangerous; 5. Production high cost
The reason why PERC battery technology has been industrialized, but has not been fully promoted, is largely due to the Al 2 o 3 The above defects of passivation layer deposition equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] An alumina slurry for surface passivation of crystalline silicon solar cells, the slurry comprises the following components in parts by weight: 65 parts of alumina sol, 10 parts of complexing agent, 3 parts of crosslinking agent, 1 part of thickener part and leveling agent 0.1 part. The complexing agent is ethylenediamine. The crosslinking agent is polyurethane. The thickener is ethyl cellulose. The leveling agent is acrylate resin.

[0017] The alumina sol is prepared by a sol-gel method, and its preparation method is as follows: adding an acidic peptizer solution to the alumina precursor, controlling n[H + ]:n[Al 3+ ]=0.1:1, control PH=3~5, 95°C water bath for 6 hours, and mechanically stir to obtain a transparent alumina sol; the acidic peptizer is hydrochloric acid.

[0018] The alumina precursor is prepared by the following method, and the preparation method includes the following steps: (1) mixing aluminum salt with water, and fully dissolving to obtain an al...

Embodiment 2

[0021] An alumina slurry for surface passivation of crystalline silicon solar cells, the slurry comprises the following components in parts by weight: 68 parts of alumina sol, 12 parts of complexing agent, 4 parts of crosslinking agent, 2 parts of thickener part and leveling agent 0.2 part. The complexing agent is ethyl acetoacetate. The crosslinking agent is urea-formaldehyde resin. The thickener is ethyl cellulose. The leveling agent is melamine formaldehyde resin.

[0022] The alumina sol is prepared by a sol-gel method, and its preparation method is as follows: adding an acidic peptizer solution to the alumina precursor, controlling n[H + ]:n[Al 3+ ]=0.2:1, control PH=3~5, 80°C water bath for 12h, and mechanically stir to obtain a transparent alumina sol; the acidic peptizer is citric acid.

[0023] The alumina precursor is prepared by the following method, and the preparation method includes the following steps: (1) mixing aluminum salt with water, and fully dissolvi...

Embodiment 3

[0026]An alumina slurry for surface passivation of crystalline silicon solar cells, the slurry comprises the following components in parts by weight: 70 parts of alumina sol, 13 parts of complexing agent, 5 parts of crosslinking agent, 3 parts of thickener part and leveling agent 0.3 part. The complexing agent is ethylenediaminetetraacetic acid. The crosslinking agent is urea-formaldehyde resin. The thickener is ethyl cellulose. The leveling agent is acrylate resin.

[0027] The alumina sol is prepared by a sol-gel method, and its preparation method is as follows: adding an acidic peptizer solution to the alumina precursor, controlling n[H + ]:n[Al 3+ ]=0.3:1, control PH=3~5, 85°C water bath for 24 hours, and mechanically stir to obtain a transparent alumina sol; the acidic peptizer is formic acid.

[0028] The alumina precursor is prepared by the following method, and the preparation method includes the following steps: (1) mixing aluminum salt with water, and fully diss...

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PUM

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Abstract

The invention discloses aluminium oxide slurry for surface passivation for a crystalline silicon solar cell and a preparation method for a passivating film. The slurry comprises the following components in parts by weight: 65-70 parts of aluminium oxide sol, 10-13 parts of complexing agent, 3-5 parts of cross-linking agent, 1-3 parts of thickening agent and 0.1-0.3 parts of flatting agent. A base material is coated with the aluminium oxide sol through a silk-screen printing mode to form a coating layer with a predetermined pattern; then the coating layer is dried and sintered to form a passivation layer with the predetermined pattern on the base material. The preparation method is simple, and all the preparation processes can be completed by using laboratory equipment; the aluminium oxide passivating film is manufactured on the back of a cell piece, so that the absorption on long-wavelength light of the cell is improved, the back surface compound of the cell is lowered, and the efficiency of the solar cell is improved.

Description

technical field [0001] The invention relates to the field of solar cell production and manufacturing, in particular to an alumina slurry and a passivation film preparation method for surface passivation of crystalline silicon solar cells. Background technique [0002] A crystalline silicon solar cell is a semiconductor device that converts light energy directly into electrical energy. Photoelectric conversion efficiency is the most important parameter of photovoltaic crystalline silicon solar cells, and it is also the core factor affecting the cost of photovoltaic power generation. For high-efficiency cells, PERC cell technology has been promoted by major cell manufacturers, and the efficiency of PERC monocrystalline silicon cells can reach 20.5%. On the whole, PERC batteries have the simplest structure among all kinds of high-efficiency crystalline silicon batteries, the lowest potential cost, high compatibility with existing battery production lines, and easy transformati...

Claims

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Application Information

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IPC IPC(8): H01L31/0236H01L31/18
CPCH01L31/02366Y02E10/50Y02P70/50
Inventor 何晨旭
Owner 何晨旭
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