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Solar monocrystalline battery piece texturing process

A cell and solar energy technology, which is applied in the field of solar monocrystalline cells, can solve the problems of abnormal appearance of cells, low yield and low conversion efficiency of cells, and achieve the effect of improving cell conversion efficiency, increasing yield, and ensuring appearance quality

Active Publication Date: 2019-08-23
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems of abnormal cell appearance, low yield and low cell conversion efficiency of the conventional solar single crystal cell texturing process, the present invention provides a solar single crystal cell texturing process. The suede and surface cleanliness of the battery sheet reach a relatively high quality, thereby improving the yield and battery conversion efficiency

Method used

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  • Solar monocrystalline battery piece texturing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Put the monocrystalline cells after the silicon inspection into the flower basket through the insertion machine, and then put them into the loading area for loading;

[0041] (2) Polishing the monocrystalline cells processed in step (1) with a concentration of 3wt% sodium hydroxide solution, once for texturing, the polishing temperature is controlled at 70°C; the polishing time is controlled at 130s;

[0042] (3) Rinse the monocrystalline cells processed in step (2) for 100 seconds with pure water;

[0043] (4) The monocrystalline cells processed in step (3) are cleaned with hydrogen peroxide / sodium hydroxide mixed solution; in the hydrogen peroxide / sodium hydroxide mixed solution, the concentration of hydrogen peroxide is 8wt%, the concentration of sodium hydroxide is 3.5wt%, and the cleaning temperature is 60 ℃, cleaning time 130s;

[0044] (5) Carry out secondary rinsing with pure water for 100 s to the monocrystalline cells processed in step (4);

[0045](6) T...

Embodiment 2

[0057] (1) Put the monocrystalline cells after the silicon inspection into the flower basket through the insertion machine, and then put them into the loading area for loading;

[0058] (2) Polishing the monocrystalline cells processed in step (1) with a concentration of 5wt% sodium hydroxide solution, the polishing temperature is controlled at 65°C; the polishing time is controlled at 130s;

[0059] (3) Rinse the monocrystalline cells processed in step (2) for 100 seconds with pure water;

[0060] (4) The monocrystalline cells processed in step (3) are cleaned with hydrogen peroxide / sodium hydroxide mixed solution; in the hydrogen peroxide / sodium hydroxide mixed solution, the concentration of hydrogen peroxide is 8wt%, the concentration of sodium hydroxide is 3.5wt%, and the cleaning temperature is 60 ℃, cleaning time 130s;

[0061] (5) Carry out secondary rinsing with pure water for 100 s to the monocrystalline cells processed in step (4);

[0062] (6) Use sodium hydroxide...

Embodiment 3

[0074] (1) Put the monocrystalline cells after the silicon inspection into the flower basket through the insertion machine, and then put them into the loading area for loading;

[0075] (2) Polishing the monocrystalline cells processed in step (1) with a concentration of 2wt% sodium hydroxide solution, the polishing temperature is controlled at 60°C; the polishing time is controlled at 200s;

[0076] (3) Rinse the monocrystalline cells processed in step (2) for 200 seconds with pure water;

[0077] (4) Cleaning the monocrystalline cells processed in step (3) with hydrogen peroxide / sodium hydroxide mixed solution; the hydrogen peroxide concentration in the hydrogen peroxide / sodium hydroxide mixed solution is 5wt%, the sodium hydroxide concentration is 10wt%, and the cleaning temperature is 50°C , the cleaning time is 200s;

[0078] (5) Carry out secondary rinsing with pure water for 200 s to the monocrystalline cells processed in step (4);

[0079] (6) Use sodium hydroxide / te...

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Abstract

The invention relates to the technical field of solar monocrystalline battery pieces, and provides a solar monocrystalline battery piece texturing process in order to solve the problems of abnormal appearance, low yield and low battery conversion efficiency of a battery piece prepared by a traditional solar monocrystalline battery piece texturing process. The process comprises the following steps:(1) feeding; (2) rough polishing; (3) first rinsing; (4) cleaning through a hydrogen peroxide / sodium hydroxide mixed solution; (5) second rinsing; (6) texturing through a sodium hydroxide / texturing additive mixed solution; (7) third rinsing; (8) cleaning through a hydrogen peroxide / sodium hydroxide mixed solution; (9) fourth rinsing; (10) cleaning with mixed acid; (11) fifth rinsing; (12) sixth rinsing; (13) cleaning with hydrofluoric acid; (14) slowly pulling and cleaning; (15) drying. By adopting the process provided by the invention, the texturing structure with the small and uniform pyramid morphology can be manufactured, the number of pyramids per unit area is increased, more light is absorbed, the short-circuit current is improved, and the conversion efficiency of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of solar single crystal cells, in particular to a process for making texturing of solar single crystal cells. Background technique [0002] In the production process of solar cells, it is necessary to texture the surface of crystalline silicon cells—that is, the texturing process. The texturing process of silicon solar cells is an extremely important process in the production process. The effective textured structure makes the incident light The multiple reflections and refractions on the surface of the silicon wafer increase the absorption of light and reduce the reflectivity, which helps to improve the performance of the battery. In the single crystal texturing process, the single crystal texturing cleaning process is widely used at present. The traditional single crystal texturing cleaning process only includes one-time texturing, pickling and water washing, which often leads to abnormal appearance and lo...

Claims

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Application Information

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IPC IPC(8): H01L31/18H01L31/0236C30B33/10
CPCC30B33/10H01L31/02363H01L31/1804Y02E10/547Y02P70/50
Inventor 刘杰陈健生
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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