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Alcohol-free amphiphilic texturing additive and preparation method thereof

An additive and amphiphilic technology, which is applied in the field of alcohol-free amphiphilic texturing additive and its preparation, can solve the problems of weak silicon adsorption, achieve high-efficiency texturing performance, good application prospects, and good large-scale industrialization promotion potential effect

Active Publication Date: 2022-02-25
ZHEJIANG AUFIRST MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of alcohols and other low-boiling volatile substances in the prior art, it is necessary to continuously replenish volatile substances and have weak adsorption to silicon. The invention provides a novel, alcohol-free, amphiphilic, texturing additive for treating the surface of monocrystalline silicon and its preparation method. The texturing additive is environmentally friendly, has a high boiling point, and has no volatile components. Maintain high-efficiency texturing performance for monocrystalline silicon surface treatment under storage conditions

Method used

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  • Alcohol-free amphiphilic texturing additive and preparation method thereof
  • Alcohol-free amphiphilic texturing additive and preparation method thereof
  • Alcohol-free amphiphilic texturing additive and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-10

[0032] According to the amount of the components in each of the following table, it is called, and the polysaccharide is added to the inorganic base solution, and the mixture is dissolved in the inorganic base solution, and the mixture is dissolved in the inorganic base solution. .

[0033] Table 1 Embodiment 1-10 of the components

[0034]

[0035]

Embodiment 11

[0040] Example 11 Test when used in failure

[0041] Test methods for failure, including the following steps:

[0042](1) The obtained an aqueous solution prepared by the prepared formulation of an example is 0.1%, and then the NaOH solid of 2% of the NaOH mass concentration is added;

[0043] (2) Preparation of a solution of a concentration of a concentration of a concentration of a concentration of a concentration of 0.1%, and then a NaOH solid having a NaOH mass concentration of 2%;

[0044] (3) Eleged liquid prepared by heating step (1) and (2) at 85 ° C, and the falling liquid temperature reached at 85 ° C, and placed in a single crystal silicon wafer to the reaction tank, and the reaction was 360s Silicon wafer, rinse the front and negative surface with pure water 15s, add N 2 Dry under the atmosphere. Since then, a phenotypy is performed every 2h, and the appearance of the four flavor flake appearance is obviously deteriorated.

Embodiment 12

[0045] Example 12 Silicon wafer weight loss test

[0046] Test methods for wafers weight loss, including the following steps:

[0047] (1) The obtained an aqueous solution prepared by the prepared formulation of an example is 0.1%, and then the NaOH solid of 2% of the NaOH mass concentration is added;

[0048] (2) Preparation of a solution of a concentration of a concentration of a concentration of a concentration of a concentration of 0.1%, and then a NaOH solid having a NaOH mass concentration of 2%;

[0049] (3) Heating steps (1) and (2) prepared from the flavor to 85 ° C; 2 sets of single crystal silicon wafers, 10 pieces per group, recorded in group I and II; use the preparation of the present invention The pile of the velvet additive was continuously velvet in group I, and the set of silicon wafers containing the II group silicon containing the existing product. The silicon wafer was dried. The weight changes before and after the reaction of the silicon film, thereby examini...

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Abstract

The invention discloses an alcohol-free amphiphilic texturing additive and a preparation method thereof, and belongs to the technical field of monocrystalline silicon surface treatment. The additive comprises polysaccharide, a surfactant and inorganic base, but does not contain alcohols, and is an alcohol-free amphiphilic texturing additive. Polysaccharide is adsorbed on the surface of monocrystalline silicon, can effectively reduce surface tension in a solution, is adsorbed on the surface of a silicon wafer as a starting point of a corrosion reaction, and provides a nucleation site for texturing corrosion. The polysaccharide is adsorbed on the surface of the silicon wafer, so that hydrogen generated in the texturing process is enabled to be timely separated from the surface of the silicon wafer, and uneven texturing caused by wafer floating or bubble mark generation is avoided. The surfactant is associated with the polysaccharide to solve the problem of high-temperature precipitation of the polysaccharide, and the additive with good adsorbability and solution stability is obtained. The additive assists the growth of a pyramid on the surface of a silicon wafer, enhances anisotropic factors of anisotropic corrosion, forms a good light trapping structure on the surface of the silicon, increases the optical path of light on the surface of the silicon, and reduces the reflectivity of the silicon wafer.

Description

Technical field [0001] The present invention relates to an alcohol-type two-progent velvet additive and a preparation method thereof, which belongs to the technical field of single crystal silicon surface treatment. Background technique [0002] With the further depletion of fossil energy, find a new sustainable energy to become an important task of human beings, solar cells are converted into electrical energy through photoelectric effects, due to their safety, convenience, not exhaus, inexhaustible The advantages have been greatly developed by people. Single crystal silicon solar cells have become the main product in solar cells due to their technical maturation, and the single crystal silicon solar cell is the highest. The main problem that currently constrained single crystal silicon solar cell development is that photoelectric conversion efficiency is too low, resulting in an increase in unit cost of single crystal silicon solar cells. The surface reflectance has always been...

Claims

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Application Information

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IPC IPC(8): C30B33/10C30B29/06H01L31/0236H01L31/18
CPCC30B33/10C30B29/06H01L31/1804H01L31/02363Y02P70/50
Inventor 侯军张洁
Owner ZHEJIANG AUFIRST MATERIAL TECH CO LTD
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