Improved outer glass anti-reflective film for photovoltaic modules

Abstract

The utility model provides an improved photovoltaic module outer glass antireflection film relates to optical thin film technical field, including super -white toughened glass base layer, the positive and negative surface of super -white toughened glass base layer is from inside to outside to have multiple sets of film layer adjacently compound, multiple sets of film layer is T iO2A layer, S i02A layer, T iO2B layer, S i O2B layer and S i C layer composition respectively, this kind of antireflection film whole design novel, simple structure can increase photovoltaic glass light transmittance, improve photovoltaic module conversion efficiency, therefore is worth using widely.

Description

Technical Field

[0001] This utility model belongs to the field of optical thin film technology, and more specifically, it relates to an improved anti-reflective film for the outer glass of photovoltaic modules. Background Technology

[0002] Currently, the tempered glass commonly used in solar photovoltaic modules includes float glass and ultra-clear tempered glass. They can effectively prevent the effects of ultraviolet rays, dust, rain, snow, hail and other weather conditions on the solar panels, thus extending the service life of the solar panels. Float glass has a light transmittance of 86%.

[0003] Based on the above, the inventors have discovered the following problem: Currently, the light transmittance of widely used ultra-clear tempered glass is around 91.5%, but there is still considerable room for improvement in solar conversion efficiency. For every 1% increase in light transmittance, the corresponding conversion efficiency increases by approximately 0.8%. However, ordinary antireflective films cannot meet the requirements of long-term outdoor working environments. Therefore, developing an antireflective film with high transmittance and outstanding weather resistance is of great significance.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided an improved anti-reflective film for the outer glass of photovoltaic modules, in order to achieve a more practical value. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an improved antireflective coating for the outer glass of photovoltaic modules, thereby solving the problem of how current antireflective coatings can improve the conversion efficiency of photovoltaic modules and increase the revenue of photovoltaic power plants.

[0006] The purpose and effect of this improved anti-reflective film on the outer glass of a photovoltaic module are achieved by the following specific technical means:

[0007] An improved antireflective coating for the outer glass of a photovoltaic module includes an ultra-clear tempered glass substrate. Multiple sets of film layers are sequentially and adjacently laminated on the front and back surfaces of the ultra-clear tempered glass substrate from the inside out. The multiple sets of film layers are composed of TiO2A layer, SiO2A layer, TiO2B layer, SiO2B layer and SiC layer.

[0008] Furthermore, the physical thickness of the TiO2A layer is 10-20 nm.

[0009] Furthermore, the physical thickness of the SiO2A layer is 40-50 nm.

[0010] Furthermore, the physical thickness of the TiO2B layer is 100-120 nm.

[0011] Furthermore, the physical thickness of the SiO2B layer is 70-80 nm.

[0012] Furthermore, the physical thickness of the SiC layer is 20-30 nm.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] In this invention, the first layer is deposited with pure TiO2A using an RF power supply. While ensuring purity, film density, and light transmittance, the adhesion between the film layer and the glass substrate is guaranteed.

[0015] The outermost SiC layer is covalently synthesized from silicon and carbon, has a stable crystal structure, good wear and scratch resistance, and good mechanical properties that make its weather resistance more stable.

[0016] The use of pulsed DC power supply enables the deposition process to obtain SiC coatings with higher purity and better density. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an improved anti-reflective film on the outer glass of a photovoltaic module according to this utility model.

[0018] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0019] 1. Ultra-clear tempered glass base layer; 2. TiO2A layer; 3. SiO2A layer; 4. TiO2B layer; 5. SiO2B layer; 6. SiC layer. Detailed Implementation

[0020] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0021] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example:

[0024] As attached Figure 1 As shown:

[0025] This utility model provides an improved antireflective coating for the outer glass of a photovoltaic module, comprising an ultra-clear tempered glass base layer 1, wherein multiple sets of film layers are sequentially and adjacently laminated on the front and back surfaces of the ultra-clear tempered glass base layer 1 from the inside out, and the multiple sets of film layers are composed of TiO2A layer 2, SiO2A layer 3, TiO2B layer 4, SiO2B layer 5 and SiC layer 6.

[0026] The TiO2A layer 2 has a physical thickness of 10-20 nm. It is obtained by sputtering a first high refractive index film layer TiO2A layer with a thickness of 10-20 nm, a planar TiO2 target as the cathode, an RF power supply, and a fixed amount of argon gas.

[0027] The physical thickness of the SiO2A layer 3 is 40-50 nm, and the physical thickness of the second low-refractive-index SiO2A layer is also 40-50 nm. The cathode is a twin cylindrical Si target, and the sputtering power supply is a medium-frequency AC power supply, filled with a fixed amount of argon and oxygen, and obtained by reactive sputtering.

[0028] The physical thickness of the TiO2B layer 4 is 100-120 nm, and the physical thickness of the third high-refractive-index TiO2B layer is also 100-120 nm. The cathode is a twin cylindrical Ti target, and the sputtering power supply is a medium-frequency AC power supply, filled with a fixed amount of argon and oxygen, and obtained by reactive sputtering.

[0029] The physical thickness of the SiO2B layer 5 is 70-80 nm, and the physical thickness of the fourth low-refractive-index SiO2B layer is also 70-80 nm. The cathode is a twin cylindrical Si target, and the sputtering power supply is a medium-frequency AC power supply, filled with a fixed amount of argon and oxygen, and obtained by reactive sputtering.

[0030] The physical thickness of the SiC layer 6 is 20-30 nm, and the physical thickness of the fifth low-refractive-index SiC layer is also 20-30 nm. The cathode is a cylindrical Si target, and the sputtering power supply is a pulsed DC power supply, filled with a fixed amount of argon and acetylene, and obtained by reactive sputtering.

[0031] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An improved antireflective coating for the outer glass of a photovoltaic module, comprising an ultra-clear tempered glass substrate (1), characterized in that: The ultra-white tempered glass base layer (1) has multiple sets of film layers sequentially laminated from the inside to the outside on both the front and back surfaces. The multiple sets of film layers are composed of TiO2A layer (2), SiO2A layer (3), TiO2B layer (4), SiO2B layer (5) and SiC layer (6).

2. The improved anti-reflective film for the outer glass of a photovoltaic module as described in claim 1, characterized in that: The physical thickness of the TiO2A layer (2) is 10-20 nm.

3. The improved anti-reflective film for the outer glass of a photovoltaic module as described in claim 1, characterized in that: The physical thickness of the Si O2A layer (3) is 40-50 nm.

4. The improved anti-reflective film for the outer glass of a photovoltaic module as described in claim 1, characterized in that: The physical thickness of the TiO2B layer (4) is 100-120 nm.

5. The improved anti-reflective film for the outer glass of a photovoltaic module as described in claim 1, characterized in that: The physical thickness of the SiO2B layer (5) is 70-80 nm.

6. The improved anti-reflective film for the outer glass of a photovoltaic module as described in claim 1, characterized in that: The physical thickness of the SiC layer (6) is 20-30 nm.

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