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Method for mixed use of texturing addition agent

An additive and application-based technology, applied in the field of solar cell technology, can solve the problems of whitening of the surface of texturing silicon wafers, insufficient control of alkali-silicon reaction, and small pyramid size, so as to reduce dosage, eliminate appearance defects, and reduce unit consumption. Effect

Inactive Publication Date: 2015-03-25
BEIJING ZHONGKEXIN ELECTRONICS EQUIP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali texturizing optimizers on the market are mainly divided into two types: 1. Insufficient control of the alkali-silicon reaction, causing the texture to gradually increase with the aging of the solution
2. The control of the alkali-silicon reaction is too strong, resulting in extremely small suede, and the pyramid structure is very small under the microscope, and the appearance is similar to that of untextured
However, the surface of the textured silicon wafer is whitish when the additive is used alone, the size of the pyramid is too small, the reflectivity is poor, and the amount of the additive is large
higher cost.

Method used

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  • Method for mixed use of texturing addition agent

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with examples, but not as a limitation of the present invention. The tank body of the texturing tank is 180L, and the initial preparation of the solution for S-929B when used alone is:

[0018] NaOH: 1000g, IPA: 14L, Na 2 SiO 3 : 300g Shichuang S-929B: 300ml ID: 165L Texturing temperature is 80-82℃, texturing time is 1300-1500S, weight loss: 0.38-0.42g,

[0019] Each batch of velvet is 200 pieces, and the amount of additional chemicals is

[0020] NaOH: 200-220g / batch, IPA: 600ml / batch, S-929B: 50ml / batch

[0021] The service life of the solution is 25 batches.

[0022] When using C-300 alone, the initial preparation of the solution:

[0023] NaOH: 1000g, Na 2 SiO 3 : 300g, Changyou C-300: 500ml, ID: 165L

[0024] Texturing temperature is 80-82°C, texturing time is 1300S, weight loss: 0.38-0.42g,

[0025] Each batch of velvet is 200 pieces, and the amount of additional chemicals is

[0026] N...

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Abstract

The invention discloses a method for mixed use of a texturing addition agent, discloses a method for improving a mono-crystal texturing effect, and belongs to the field of semiconductor manufacturing. The texturing effect is optimized by the method via using the mixed texturing optimization agent. The specification gives detailed description of the method and also gives a specific practical scheme.

Description

technical field [0001] The invention relates to the technical field of solar cell technology, and is mainly used to improve the effect of single crystal texturing. [0002] Reduce battery unit consumption. Background technique [0003] At present, the development direction of crystalline silicon solar cells is still to reduce costs and improve efficiency. In order to achieve these two goals, the effect of single crystal alkali texturing is particularly important. However, the alkali texturizing optimizers on the market are mainly divided into two types: 1. Insufficient control of the alkali-silicon reaction, causing the texture to gradually increase with the aging of the solution. 2. The control of the alkali-silicon reaction is too strong, resulting in extremely small suede. The pyramid structure is very small under the microscope, and the appearance is similar to that of unmade suede. [0004] The optimizers used this time are Shichuang S-929B and Changyou C-300 [000...

Claims

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Application Information

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IPC IPC(8): H01L21/306
CPCH01L31/02363
Inventor 马志强
Owner BEIJING ZHONGKEXIN ELECTRONICS EQUIP