A kind of preparation method of high light transmittance coated photovoltaic glass

A photovoltaic glass and high light transmittance technology, applied in the field of solar cells, can solve problems such as poor durability, poor weather resistance, and technical bottlenecks, and achieve the effects of ensuring long-term durability, increasing output power, and dense and uniform film layers

Active Publication Date: 2017-11-28
SHANGHAI & SOLAR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, conventional photovoltaic coated glass on the market mainly uses increasing the porosity inside the film layer to improve the effect of anti-reflection. The inevitable increase of the rate will affect the weather resistance of the film layer, and the technology will fall into a bottleneck
Traditional anti-reflection coated glass such as figure 1 , where 1 is a silane coupling agent, 2 is silica particles, and 3 is a glass substrate. The silane coupling agent is used in the coating solution to simply bond the silica atoms together to form a film layer with internal pores. However, due to The silane coupling agent used cannot effectively prevent external substances (water vapor, impurities, dust) from invading the interior of the glass, so its durability is relatively poor, and then the coating solution is coated on the surface of the glass by roller coating , such as the specific process such as figure 2 As shown in , where 4 is the photovoltaic glass, 5 is the coating solution, 6 is the application roller, and 7 is the reverse roller
[0003] The disadvantage of the above technology is that due to the open structure design of the film layer, the weather resistance is relatively poor
At the same time, due to the use of roller coating method to coat the glass surface, the uniformity of the film cannot be guaranteed, so the instability of the process may lead to fluctuations in the light transmittance of the coated glass, thereby affecting the output power of the solar module

Method used

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  • A kind of preparation method of high light transmittance coated photovoltaic glass
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  • A kind of preparation method of high light transmittance coated photovoltaic glass

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Embodiment 1

[0027] The preparation method of the high light transmittance coated photovoltaic glass provided in this embodiment includes the following steps:

[0028] (1) In order to form a layer of crystal grains with a positive pyramid structure on the photovoltaic glass surface, a wet etching technique is adopted, which is divided into three steps: a. the etchant (10% HF solution by mass percentage ) moves to the surface of the silicon wafer; b. chemically reacts with the exposed glass for 550-650 seconds to generate soluble by-products; c. removes the reaction product from the glass surface, and the etchant is 10% by mass. HF solution, because the concentration of HF solution on SiO 2 It has a very high corrosion selectivity, and the main component of the glass is SiO 2 , while SiO 2 There are many crystal orientations in itself, so the acidic solution is used to preferentially corrode the defects in the crystal lattice, and the crystal orientation with less atomic accumulation and ...

Embodiment 2

[0031] The preparation method of the high light transmittance coated photovoltaic glass provided in this embodiment includes the following steps:

[0032] (1) In order to form a layer of positive pyramid structure grains on the surface of photovoltaic glass, dry etching technology is used to focus the 532nm frequency doubled YAG laser to the scanning tunneling microscope and the working area ( Figure 4 The base plate in is the tip of the photovoltaic glass surface). Close to the tip, due to the combination of Rayleigh scattering and surface plasmon excitation, the field strength can be increased by 1 million times, so that it can produce a channel with a width of about 10nm, which can be repeatedly etched on the same channel, while gradually reducing the number of etches. The width of the eclipse can form regular pyramidal grains, such as Figure 4 shown in . The specific process parameters are as follows: the pulse energy is 50 μJ, the laser repetition rate is 1000 Hz, and...

Embodiment 3

[0036] The preparation method of the high light transmittance coated photovoltaic glass provided in this embodiment includes the following steps:

[0037] (1) In order to form a layer of crystal grains with a regular pyramid structure on the surface of photovoltaic glass, dry etching technology is used. During dry etching, an excimer laser is used, which is sequentially collimated and corrected, and the beam is shaped to form a spot area A flat and uniform rectangular beam of 12mm×24mm, namely Figure 5The incident laser beam on the left is shown, and the beam is reshaped and filtered by the mask grating to form an image source. In addition, between the two mirrors M1 and M2 in the optical path diagram, there are two attenuation lenses with attenuation rates of 95% (A1) and 50% (A2) to choose from, which are used to align the pulse energy of the excimer laser. Make adjustments. In the optical path, the positions of the reflecting mirrors M5 and M6 are adjustable in the horiz...

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Abstract

The invention discloses a method for preparing high-transparency coated photovoltaic glass. The method comprises the following steps: (1) selecting photovoltaic glass, and forming a pyramid structure on the surface of photovoltaic glass by adopting the dry-etching or wet-etching technology; and (2) coating an antireflection film layer on the pyramid structure on the surface of the photovoltaic glass by adopting a chemical vapor deposition method to obtain the high-transparency coated photovoltaic glass. According to the method, the transparency of the coated photovoltaic glass is improved, and the long-term weather resistance of the photovoltaic glass is guaranteed.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a method for preparing a high-transmittance coated photovoltaic glass. Background technique [0002] At present, conventional photovoltaic coated glass on the market mainly uses increasing the porosity inside the film layer to improve the effect of anti-reflection. The inevitable increase of the rate will affect the weather resistance of the film layer, and the technology will fall into a bottleneck. Traditional anti-reflection coated glass such as figure 1 , where 1 is a silane coupling agent, 2 is silica particles, and 3 is a glass substrate. The silane coupling agent is used in the coating solution to simply bond the silica atoms together to form a film layer with internal pores. However, due to The silane coupling agent used cannot effectively prevent external substances (water vapor, impurities, dust) from invading the interior of the glass, so its durability is rela...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C15/00C03C17/245
CPCC03C15/00C03C17/245C03C2217/213C03C2217/70
Inventor 严迎杰冯浩王永丰
Owner SHANGHAI & SOLAR TECH
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