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Texturing additive with liquid crystal structure, preparation method and application thereof

A liquid crystal structure and additive technology, which is applied in the field of texturing additives with liquid crystal structure and its preparation, can solve the problems of increasing or failing to further increase the pyramid density, unfavorable photoelectric conversion rate of solar cells, etc., and achieves the effect of good texturing performance.

Pending Publication Date: 2022-01-28
CHANGZHOU JUNHE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The currently used texturing additives can only control the size of the pyramids within the range of 2-4 μm, and cannot further increase the density of the pyramids, and the reflectivity of the surface can only reach 10-14%, which is not conducive to the further improvement of the photoelectric conversion rate of solar cells

Method used

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  • Texturing additive with liquid crystal structure, preparation method and application thereof
  • Texturing additive with liquid crystal structure, preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0023] A texturing additive with a liquid crystal structure, consisting of the following components in weight percent: 0.4% sucrose ester, 0.3% liquid crystal emulsifier, 1.0% polyethylene glycol, 0.3% sodium lignosulfonate, tetrasodium edetate 1.0%, triethanolamine 0.5%, deionized water 96.5%.

[0024] In this embodiment, the HLB of sucrose ester is 11, the liquid crystal emulsifier is C16-18 alkyl glucoside, and the polyethylene glycol is polyethylene glycol 400.

[0025] The preparation method of the texturizing additive with liquid crystal structure comprises the following steps:

[0026] S1. Put sucrose ester and liquid crystal emulsifier into the container by weight, mix with deionized water, heat to 60°C, and keep stirring to obtain A solution;

[0027] S2. Add polyethylene glycol, sodium lignosulfonate, tetrasodium ethylenediaminetetraacetate, and triethanolamine into a container by weight, mix them with deionized water, and heat to 80°C to obtain solution B;

[0028...

Embodiment 2

[0034] A texturing additive with a liquid crystal structure, consisting of the following components in weight percent: 0.4% sucrose ester, 0.3% liquid crystal emulsifier, 1.0% polyethylene glycol, 0.4% sodium lignosulfonate, tetrasodium edetate 1.0%, triethanolamine 0.5%, deionized water 96.4%.

[0035] In this embodiment, the HLB of sucrose ester is 11, the liquid crystal emulsifier is C14-22 alkanol glucoside, and the polyethylene glycol is polyethylene glycol 200.

[0036] The preparation method of the texturizing additive with liquid crystal structure comprises the following steps:

[0037] S1. Put sucrose ester and liquid crystal emulsifier into the container by weight, mix with deionized water, heat to 60°C, and keep stirring to obtain A solution;

[0038] S2. Add polyethylene glycol, sodium lignosulfonate, tetrasodium ethylenediaminetetraacetate, and triethanolamine into a container by weight, mix them with deionized water, and heat to 80°C to obtain solution B;

[00...

Embodiment 3

[0045] A texturing additive with a liquid crystal structure, consisting of the following components in weight percent: 0.4% sucrose ester, 0.3% liquid crystal emulsifier, 1.0% polyethylene glycol, 0.2% sodium lignosulfonate, tetrasodium edetate 1.0%, triethanolamine 0.5%, deionized water 96.6%.

[0046] In this embodiment, the HLB of the sucrose ester is 9, the liquid crystal emulsifier is sorbitan stearate, and the polyethylene glycol is polyethylene glycol 600.

[0047] The preparation method of the texturing additive with liquid crystal structure comprises the following steps:

[0048] S1. Put sucrose ester and liquid crystal emulsifier into the container by weight, mix with deionized water, heat to 60°C, and keep stirring to obtain A solution;

[0049] S2. Add polyethylene glycol, sodium lignosulfonate, tetrasodium ethylenediaminetetraacetate, and triethanolamine into a container by weight, mix them with deionized water, and heat to 80°C to obtain solution B;

[0050] S3...

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Abstract

The invention relates to the technical field of monocrystalline silicon texturing, in particular to a texturing additive with a liquid crystal structure. The texturing additive consists of the following components in percentage by weight: 0.01-1.0% of sucrose ester, 0.02-1.2%of a liquid crystal emulsifier, 0.5-3.0%of polyethylene glycol, 0.01-2%of sodium lignin sulfonate, 0.5-1.5%of ethylene diamine tetraacetic acid tetrasodium salt, 0.01-1.0% of triethanolamine and 96-99%of deionized water. According to the invention, the main nucleating agent sucrose ester has strong polar groups, forms strong hydrogen-bond interaction with Si-H bonds on the surface of the silicon wafer, can be well adsorbed on the surface of the silicon wafer to generate abundant nucleation points, and has good fluff discharge performance; and the liquid crystal emulsifier can be self-emulsified in a water phase or an oil phase to form micelles in water, and the emulsifier molecule micelles tend to form a multi-layer film structure so as to form a liquid crystal structure, so that the reflectivity of the upper part and the lower part of a textured silicon wafer reaches good identity, and the in-wafer uniformity of the textured silicon wafer is improved.

Description

technical field [0001] The invention relates to the technical field of monocrystalline silicon texturing, in particular to a texturing additive with a liquid crystal structure and a preparation method and application thereof. Background technique [0002] Texturing is a process in the production of monocrystalline silicon wafers. During the texturing process of diamond-wire-cut monocrystalline silicon wafers, chemical etching is used to remove the damaged layer and form an anti-reflection textured structure. The conventional texturing process generally uses sodium hydroxide or potassium hydroxide solution to corrode the surface of the single crystal, and utilizes the characteristics of different corrosion rates in different crystal orientations of crystalline silicon to form uniform and dense pyramidal morphology (that is, pyramids) on the surface of the silicon wafer. ), to achieve the purpose of reducing the reflection of silicon wafers to sunlight and improving the photoe...

Claims

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Application Information

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IPC IPC(8): C30B33/10C30B29/06
CPCC30B33/10C30B29/06Y02P70/50
Inventor 陆由东毛科人吴伟峰
Owner CHANGZHOU JUNHE TECH
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