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Method for producing an anti-reflective coating for optical and thermoelectrical devices

An anti-reflection coating and coating technology, applied in chemical instruments and methods, coatings, optics, etc., can solve the problem that coatings are not suitable for outdoor use, achieve good photochemical properties, optimize light transmission, and improve system efficiency. Effect

Inactive Publication Date: 2015-09-02
ABENGOA SOLAR NEW TECH SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process allows obtaining hybrid sol-gel films of strong organic nature disrupted by electrolytes for porosity, but these coatings are not suitable for outdoor use

Method used

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  • Method for producing an anti-reflective coating for optical and thermoelectrical devices
  • Method for producing an anti-reflective coating for optical and thermoelectrical devices
  • Method for producing an anti-reflective coating for optical and thermoelectrical devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Preparation of anti-reflective coating and deposition on glass substrates.

[0044] First, a sol was prepared by mixing 2.147 μl of TEOS (tetraethylorthosilicate), 639 μl of MeTES (triethoxymethylsilane), 2637 μl of absolute ethanol, 462 μl of deionized water, and 114 μl of 60% nitric acid solution. The sol was mixed under continuous stirring and the sol was hydrolyzed at 65° C. for 3 hours in a thermostatic bath at 300 rpm. To 5 ml of the hydrolyzed sol was added 436 mg of castor oil and 10 ml of Brij 56 (non-ionic surfactant) dissolved in ethanol (11.2% m / m); they were mixed vigorously and hydrolyzed for a further 3 hours at 65° C. in a 300 rpm water bath. Then cool at room temperature for a few minutes.

[0045] Deposition is then continued to form the antireflective film by the previously obtained sol-gel spraying technique. Cleaning of the glass substrate was performed first for deposition with ethanol. A 1:2 dilution of the hydrolyzed and tempered...

Embodiment 2

[0048] Example 2: Measurement of the transmittance of the coated substrate obtained in Example 1.

[0049] Subsequently, the transmittance according to the wavelength of the coated substrate obtained in Example 1 was measured by using a Cary50 ultraviolet spectrophotometer. Substrates coated on both sides were also measured. The data obtained are shown in figure 1 middle. As mentioned above, the transmission increased from 91.4% (at 600 nm) to 94% when the coating was implemented on one side, or to 97.6% when implemented on both sides.

Embodiment 3

[0050] Example 3: Photochemical stability test of the coated substrate obtained in Example 1.

[0051] To test the photochemical stability of the coated substrates, a solar simulator was used, which reproduces the spectrum of sunlight and focuses the light to speed up the measurement. The coated glass substrate obtained in Example 1 was exposed to radiation at a temperature of 120° C. for 45 days to receive a concentrated radiation source corresponding to “10×sun”, which corresponds to 600 days of solar irradiation or at 1 14,400 hours of direct sunlight exposure under a single sun. figure 2 It is shown how the percent transmittance is almost unchanged despite being exposed for more than 14400 hours (the absolute transmittance of the coated substrates dropped by an average of 0.55% relative to the initial value).

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Abstract

The invention relates to a sol-gel method for producing an anti-reflective coating from alcoxide-type precursors, that can subsequently be applied to glass or plastic substrates by spraying. The invention also relates to optical and thermoelectrical devices that have been coated with said anti-reflective material. This coating increases the transmittance of the transparent substrates over which it is applied, as a result of which it is useful to apply over high concentration solar modules (HCPV), for both primary lenses and secondary lenses, in conventional silicon or in CSP tubes.

Description

technical field [0001] The invention relates to a method for obtaining antireflective coatings by sol-gel technology on glass or plastic substrates. This coating increases the transmittance of the transparent substrate on which the coating is applied, so it is applied to high concentration solar cell modules / high concentration solar cell modules (HCPV), in both the main lens and the auxiliary lens, Useful in regular silicon or in thermoelectric CSP tubes. Also, in the glass windows of the tower receiver. [0002] Accordingly, the invention may be limited to the field of solar and thermoelectric energy devices. Background technique [0003] Solar collectors require an outer glass cover to reduce light loss from light transmission. To solve this problem and improve the performance of the system, a coating with a predetermined thickness is used on a substrate whose transmittance varies between 0.90 and 0.92 so that the transmitted light loss varies between 8 and 10%. To re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00C01B33/14
CPCC01B33/155C03C2218/113C03C17/25C03C2217/732C03C2217/213C01B33/159F24S70/30Y02E10/40B05D3/0272B05D5/061C03C17/30C09D183/06G02B1/111
Inventor 塞巴斯蒂安·卡帕罗斯·希门尼斯大卫·所罗门·莱维·科恩马科斯·丹尼尔·扎耶特·苏斯埃利克·卡斯特伦·埃利松多大卫·埃拉尔门德罗·富恩特斯
Owner ABENGOA SOLAR NEW TECH SA
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