Anti-blue light, high transmittance coated front panel and anti-blue light solar cell module

Abstract

The present invention provides a blue light protection, high transmittance coated front plate, comprising float glass, on which a first film structure is arranged, the first film structure comprising a plurality of high refractive index film layers and at least one low refractive index film layer, the coating material used for the high refractive index film layer is Nb 2 O 5 The coating material used for the low refractive index film layer is SiO 2 . The present invention also provides an anti-blue light solar cell assembly, comprising a front plate, an adhesive film for packaging, a solar cell chip, a photovoltaic junction box and an aluminum alloy auxiliary frame; the front plate adopts the above-mentioned anti-blue light, high-transmittance coated front plate, and the first film structure of the anti-blue light, high-transmittance coated front plate is located close to the solar cell chip relative to the float glass. The anti-blue light solar cell assembly has a sunlight transmittance of more than 90% within the entire sunlight spectrum. The anti-blue light solar cell assembly has a rich color and no color difference. The color can be stable when observed from multiple angles and large angles.

Description

Technical Field

[0001] The invention relates to a front plate used for a solar cell assembly, and in particular to a blue light-proof, high-transmittance coated front plate.

[0002] The invention also relates to a blue light protection solar cell assembly. Background Art

[0003] Solar energy is a clean energy source. With the deepening of research on solar energy applications, photovoltaic building integration (BIPV) technology has gradually matured. The appearance of traditional solar cell modules is a single black-gray color. With the demand and improvement of architectural aesthetics and personalized decoration, the application of colored solar cell modules has gradually been accepted and promoted by people. Colored glass or colored plastic substrates are widely used in special buildings and other occasions.

[0004] Among the existing colored solar cell modules, blue solar cell modules have a better match with buildings and a wider range of applications, and the promotion of solar cell modules with blue decorative effects has become a popular trend.

[0005] Visible light plays an important role in stimulating the formation and realization of human visual function. However, excessive light exposure can cause damage to the retina, leading to visual impairment and even blindness. With the gradual deepening of research on the mechanism of retinal light damage, people have found that blue light (440nm-500nm) in visible light has high sensitivity to the retina and strong penetration ability, and is closely related to the increasing incidence of age-related macular degeneration.

[0006] (1) Using colored glass as the front plate for module packaging. Using colored glass as the front plate for packaging instead of the original ultra-clear float glass, a colored solar cell module is encapsulated. This method mainly uses chemical vapor deposition (CVD) to dope colored particles in the glass during the production of float glass to give the glass color. Because the doped particles are mainly metal particles, they have high absorption of sunlight, which reduces the sunlight transmittance. When used on the front plate of a solar cell module, the power generation efficiency of the solar cell module is greatly reduced.

[0007] (2) Use dyed film to replace the colorless film used in traditional module packaging. The original colorless film used to package the solar module is replaced with a dyed film or a dyed film layer is added to the colorless film layer to encapsulate the colored solar cell module. This method is similar to method (1), mainly because the dyed film absorbs sunlight heavily and has poor transmittance, which affects the power generation efficiency of the solar cell module. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a blue light protection and high transmittance coated front plate with good blue light protection effect and high sunlight transmittance.

[0009] Another technical problem to be solved by the present invention is to provide a blue light protection solar cell assembly.

[0010] In order to solve the above technical problems, the present invention provides a blue light protection, high transmittance coated front plate, comprising float glass;

[0011] The float glass is provided with a first film structure, which includes a plurality of high refractive index film layers and at least one low refractive index film layer. The coating material used for the high refractive index film layer is Nb 2 O 5 The coating material used for the low refractive index film layer is SiO 2 The high refractive index film layer and the low refractive index film layer are distributed in sequence, and the film layer closest to and farthest from the float glass surface are both high refractive index film layers.

[0012] As a preferred embodiment of the anti-blue light, high-transmittance coated front plate, the first film structure includes three layers of high refractive index film layers and two layers of low refractive index film layers, namely, a first layer of high refractive index film layer, a second layer of low refractive index film layer, a third layer of high refractive index film layer, a fourth layer of low refractive index film layer, and a fifth layer of high refractive index film layer;

[0013] The thickness of the first high refractive index film layer is 21.78nm to 27.89nm;

[0014] The thickness of the second low refractive index film layer is 75.30nm~93.29nm;

[0015] The thickness of the third high refractive index film layer is 43.50nm~55.79nm;

[0016] The thickness of the fourth low refractive index film layer is 75.31nm~93.38nm;

[0017] The thickness of the fifth high refractive index film layer is 21.70nm-27.90nm.

[0018] As the preferred embodiment of the anti-blue light and high-transmittance coated front plate, the thickness of the first high-refractive index film layer is 24.03nm;

[0019] The thickness of the second low refractive index film layer is 81.85nm;

[0020] The thickness of the third high refractive index film layer is 48.08nm;

[0021] The thickness of the fourth low refractive index film layer is 81.85nm;

[0022] The thickness of the fifth high refractive index film layer is 24.03 nm.

[0023] This anti-blue light, high transmittance coated front panel has the following technical effects:

[0024] 1. The number of coating layers is reduced to only 5 layers.

[0025] 2. Large-area substrates can be plated, and the mass production cost is low. This technical solution uses magnetron sputtering coating method to carry out large-area batch coating and reduce production costs.

[0026] 3. The film system provided by this anti-blue light, high-transmittance coated front plate is symmetrical and regular, the thickness of each film layer is basically the same, and the film layer is relatively thin. The film system structure is stable and easy to control in production, which is conducive to reducing production costs and improving production rhythm.

[0027] 4. Excellent anti-blue light effect, achieving high reflection and low transmittance (high reflectivity, low transmittance) within the harmful blue light wavelength range (400nm-440nm), and high transmittance within the beneficial blue light wavelength range (480nm-500nm).

[0028] 5. Nb 2 O 5 The optical constants are excellent and higher than other commonly used high refractive index materials such as TiO 2 or Ti 3 O 5 It is easy to sputter, has a high sputtering rate, high film deposition efficiency, and good optical properties of the film layer. It saves coating time, improves production cycle, and increases production capacity.

[0029] 6. The solar power generation window (translucent power generation curtain wall) produced, in addition to the basic functions of windows, can realize sunlight power generation, which is visible and avoids blue light pollution of human eyes. The produced power generation window is a rich and bright blue color, showing the same color when observed from multiple angles, and has good color stability.

[0030] As a preferred embodiment of the present invention, the float glass is provided with an AS / AF film on the surface of the side away from the first film structure.

[0031] AS / AF film makes this anti-blue light, high transmittance coated front panel have the functions of scratch resistance, wear resistance, stain resistance, easy cleaning, anti-fingerprint, etc. It can avoid surface contamination or damage, reduce the frequency of manual cleaning of the outer surface of solar cell modules, and save manpower and financial resources.

[0032] As a preferred embodiment of the present invention, a second film structure is further provided between the float glass and the AS / AF film, and the second film structure also includes four layers of high refractive index film layers and four layers of low refractive index film layers. The coating material used for the high refractive index film layers is Nb 2 O 5 The coating material used for the low refractive index film layer is SiO 2 ;

[0033] From the float glass to the outside, the sixth high refractive index film layer, the seventh low refractive index film layer, the eighth high refractive index film layer, the ninth low refractive index film layer, the tenth high refractive index film layer, the eleventh low refractive index film layer, the twelfth high refractive index film layer, and the thirteenth low refractive index film layer are arranged in order;

[0034] The thickness of the sixth high refractive index film layer is 12.61nm;

[0035] The thickness of the seventh low-refractive-index film layer is 39.72 nm;

[0036] The thickness of the eighth high refractive index film layer is 30.25 nm;

[0037] The thickness of the ninth low refractive index film layer is 99.36nm;

[0038] The thickness of the tenth high refractive index film layer is 12.37 nm;

[0039] The thickness of the eleventh low refractive index film layer is 18.23 nm;

[0040] The thickness of the twelfth high refractive index film layer is 23.98nm;

[0041] The thickness of the thirteenth low refractive index film layer is 105.70 nm.

[0042] The anti-blue light, high transmittance coated front plate is coated with a second film structure on the outer surface of the glass. The second film structure eliminates about 4% of the reflectivity of the glass surface, further improving the sunlight transmittance, thereby improving the power generation efficiency of the solar cell module.

[0043] As a preferred embodiment of the present invention, the surface of the float glass on the side away from the first film structure is a rough matte surface, and an AS / AF film is provided on the matte surface.

[0044] This anti-blue light, high transmittance coated front panel has the functions of scratch resistance, wear resistance, stain resistance, easy cleaning, anti-fingerprint, etc. It can prevent the surface from being polluted or damaged, and at the same time, because the outer surface of the float glass is made into a diffusely reflective matte surface, an AG anti-glare effect is formed, the surface mirror reflection is eliminated, and it has better environmental friendliness.

[0045] In order to solve the above technical problems, the present invention also provides an anti-blue light solar cell assembly, including a front panel, a packaging film, a solar cell chip, a photovoltaic junction box and an aluminum alloy auxiliary frame; the front panel adopts the above-mentioned anti-blue light, high-transmittance coated front panel, and the first film structure of the anti-blue light, high-transmittance coated front panel is located close to the solar cell chip side relative to the float glass.

[0046] As a preference of the present invention, the solar cell chip is a light-transmitting solar cell chip or a light-opaque solar cell chip.

[0047] The blue light protection solar cell module has a sunlight transmittance of more than 90% within the entire sunlight spectrum. The produced blue light protection solar cell module has a strong color and no color difference. The color can be stable when observed from multiple angles and large angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic structural diagram of the blue light protection and high transmittance coated front plate in the first embodiment.

[0049] Figure 2 It is a schematic structural diagram of the light-transmitting solar cell chip in the first embodiment.

[0050] Figure 3 It is a film system structure diagram of the blue light protection and high transmittance coated front plate in Example 1.

[0051] Figure 4 This is the spectrum of the anti-blue light, high-transmittance coated front plate after coating in Example 1.

[0052] Figure 5 This is a chromaticity diagram of the blue light protection and high transmittance coated front plate after coating in Example 1.

[0053] Figure 6 It is the CIE L*a*b* color model in the first embodiment.

[0054] Figure 7 It is a schematic diagram of the structure of the blue light protection solar cell assembly in Example 1.

[0055] Figure 8 It is a schematic diagram of the structure of the blue light protection solar cell assembly in Example 3.

[0056] Fig. 9 It is a schematic diagram of the structure of the blue light protection solar cell assembly in the fourth embodiment.

[0057] Fig.10 It is a partial schematic diagram of the blue light protection solar cell assembly in the fifth embodiment.

[0058] Fig.11 It is a partial schematic diagram of the blue light protection solar cell assembly in the fifth embodiment.

[0059] Fig.12 This is the single-side reflectivity spectrum of the untreated ultra-white glass surface in Example 5.

[0060] Fig.13 This is a comparison spectrum of the reflectivity of the single side of the ultra-clear glass without coating and after coating with AR coating in Example 5.

[0061] Fig.14 It is a partial schematic diagram of the blue light protection solar cell assembly in Example 6.

[0062] Fig.15 It is a partial schematic diagram of the blue light protection solar cell assembly in Example 7. DETAILED DESCRIPTION

[0063] Embodiment 1

[0064] like Figure 1 As shown, the anti-blue light, high transmittance coated front plate 3 comprises a float glass, on which a first film structure is provided, the first film structure comprising three layers of high refractive index film layers and two layers of low refractive index film layers, the coating material used for the high refractive index film layers is Nb 2 O 5 The coating material used for the low refractive index film is SiO 2 , three layers of high refractive index film layers and two layers of low refractive index film layers are distributed in sequence, and the film layers closest to and farthest from the float glass surface are both high refractive index film layers.

[0065] The first film structure includes three high refractive index film layers and two low refractive index film layers, which from the surface of the float glass to the outside are the first high refractive index film layer 32a, the second low refractive index film layer 32b, the third high refractive index film layer 32c, the fourth low refractive index film layer 32d, and the fifth high refractive index film layer 32e.

[0066] The thickness of the first high refractive index film layer 32a is 24.03 nm;

[0067] The thickness of the second low refractive index film layer 32b is 81.85 nm;

[0068] The thickness of the third high refractive index film layer 32c is 48.08 nm;

[0069] The thickness of the fourth low refractive index film layer 32d is 81.85 nm;

[0070] The thickness of the fifth high refractive index film layer 32e is 24.03 nm.

[0071] The blue light protection solar cell assembly comprises a front plate, an encapsulation adhesive film, a solar cell chip, a photovoltaic junction box and an aluminum alloy auxiliary frame. The front plate adopts the above-mentioned blue light protection, high transmittance coated front plate. The first film structure of the blue light protection, high transmittance coated front plate is located close to the solar cell chip side relative to the float glass.

[0072] The preparation process of the blue light protection solar cell assembly comprises the following steps:

[0073] Step a) preparing a light-transmitting solar cell chip.

[0074] like Figure 2As shown, the solar cell chip used is a light-transmitting chip 1 (3.2 mm thick, glass-based copper indium gallium selenide thin-film solar cell chip) provided by a German company. The black area 12 is the area with the cell chip, and the blank area 11 is the light-transmitting area of ​​the array without the chip (the size or shape of the blank area 11 can be adjusted to adjust the chip's light transmittance according to its closeness to the array).

[0075] Step b) Preparation of blue light protection and high sunlight transmittance coated front panel.

[0076] The float glass to be coated is cleaned and dried. The substrate used in this embodiment is a 5 mm thick tempered ultra-clear float glass (n=1.52);

[0077] The vacuum coating equipment is evacuated. In this embodiment, a magnetron sputtering coating equipment is used, and the vacuum degree of the sputtering chamber is at least 8.0×10 -3 Pa or higher;

[0078] The cleaned and dried substrate to be coated is mounted on the substrate rack and then enters the coating chamber.

[0079] A film forming system is introduced for vacuum coating. In this embodiment, the following film system is used: Sub|H(24.03nm)L(81.85nm)H(48.08nm)L(81.85nm)H(24.03nm)|Air. (Sub is the substrate, Air is the air side);

[0080] Among them, H is a high refractive index material, and Nb is used. 2 O 5 (niobium pentoxide); L is a low refractive index material, SiO 2 (Silicon dioxide); Air is the emitting medium air.

[0081] like Figure 3 As shown, the anti-blue light film system structure used in the anti-blue light, high-transmittance coated front plate 3 is a regular symmetrical structure, the production is easy to control, and the film system has good stability.

[0082] The anti-blue light, high transmittance coated front plate 3 is coated, the vacuum is broken, the coated substrate is taken out and data detection is performed.

[0083] The transmittance and reflectance spectra of the substrate are as follows Figure 4 After coating, the substrate has better blue light protection effect than the existing technology. In the harmful blue light wavelength range (400nm-440nm), it achieves high reflection and low transmittance (high reflectivity, low transmittance), and has higher transmittance in the beneficial blue light wavelength range (480nm-500nm); in the entire sunlight spectrum range, the sunlight transmittance is as high as more than 90%.

[0084] Figure 5 This is the chromaticity diagram of the substrate after coating. When the incident angle AOI = 0°, 10°, 20°, 30°, 40°, 50°, 60°, the color distribution is basically concentrated, ensuring that it presents the same color at multiple angles and has good color stability. The relevant color values ​​of the substrate after coating are as follows:

[0085]

[0086] The above table shows the color values ​​of the substrate after coating. As can be seen from the above table, the color saturation C*(ab) is quite high, which ensures that the color of the solar cell module encapsulated later is rich and bright, and ensures that the solar cell module produced by it is more intense and brighter than the colored solar cell module produced by the prior art. And the color difference is small at each AOI angle. It can be seen from b* that the color is quite blue (b* value reflects the degree of blue and yellow of the substrate after coating, positive value represents more yellow, negative value represents more blue.), and the b* difference is small at each incident angle.

[0087] Note: CIE L*a*b* mode: In view of the fact that there are too many color standards and it is impossible to unify them, the International Color Association has specially formulated a set of internationally accepted color representation standards in 1931. This color system has nothing to do with printing equipment and materials. L*a*b* consists of a vertical axis representing the brightness (Luminance) from full white to full black (reflected by the L* value), and two horizontal extensions representing the color, one of which is red to green (reflected by the a* value), and the other represents blue to yellow (reflected by the b* value). Figure 6 .

[0088] Step c) packaging the blue light protection solar cell assembly.

[0089] like Figure 7 As shown, the present anti-blue light solar cell assembly uses a glass-based copper indium gallium selenide thin-film solar cell chip; the encapsulation film 2 uses a photovoltaic-grade PVB film with a thickness of 1.14 mm (other thicknesses or other encapsulation films, such as PU, SGP, POE, EVA, etc., can also be used); the tempered ultra-clear float glass 31 and the first film structure 32 together form the present anti-blue light, high-transmittance coated front plate 3;

[0090] The photovoltaic junction box 4 uses a split junction box (the photovoltaic junction box 4 can also use an integrated type, side-connected type, pen-type, back-connected type, etc. photovoltaic junction box); the photovoltaic junction box 4 and the installation aluminum alloy auxiliary frame 5 are installed last, and they can be installed after the components are laminated, autoclaved, and EL, IV, etc. are tested.

[0091] Step d) Component lamination.

[0092] The specific lamination process parameters are as follows:

[0093]

[0094] As shown in the table above, the process parameters of the laminated light-transmitting solar cell module are used. The module is put into the laminator for pre-pressing according to the process in the table above.

[0095] Step e) autoclave pressing of the components.

[0096] The specific autoclave process parameters are as follows:

[0097] Temperature(℃) Time (min) Pressure(MPa) Time (min) 20 / / / 45 20 0.4 25 70 20 0.8 25 100 25 1 20 130 30 1.2 25 130 60 1.2 40 100 30 1.2 40 50 35 1.2 40 30 10 1.2 15

[0098] The laminated components are then loaded onto the autoclave workpiece rack and placed into the autoclave for autoclave pressing according to the process parameters in the table above. After autoclave pressing, the excess PVB film on the edge of the components is trimmed.

[0099] Step f) IV and EL testing (power, voltage, current, thermal imaging defect detection and analysis).

[0100] Step g) Attach the frame 5 and apply structural adhesive (two-component silicone structural adhesive).

[0101] Step h) installing the photovoltaic junction box 4.

[0102] Step i) After the structural adhesive is cured, the components are packed and put into storage.

[0103] Embodiment 2

[0104] The blue light protection and high transmittance coated front plate 3 comprises a float glass, and a first film structure is arranged on the float glass. The first film structure comprises three layers of high refractive index film layers and two layers of low refractive index film layers. The coating material used for the high refractive index film layers is Nb 2 O 5 The coating material used for the low refractive index film is SiO 2 , three layers of high refractive index film layers and two layers of low refractive index film layers are distributed in sequence, and the film layers closest to and farthest from the float glass surface are both high refractive index film layers.

[0105] The first film structure includes three high refractive index film layers and two low refractive index film layers, which from the surface of the float glass to the outside are the first high refractive index film layer 32a, the second low refractive index film layer 32b, the third high refractive index film layer 32c, the fourth low refractive index film layer 32d, and the fifth high refractive index film layer 32e.

[0106] The thickness of the first high refractive index film layer 32a is 21.78 nm;

[0107] The thickness of the second low refractive index film layer 32b is 75.30 nm;

[0108] The thickness of the third high refractive index film layer 32c is 43.50 nm;

[0109] The thickness of the fourth low refractive index film layer 32d is 75.31 nm;

[0110] The thickness of the fifth high refractive index film layer 32e is 21.70 nm.

[0111] The blue light protection solar cell assembly comprises a front plate, an encapsulation adhesive film, a solar cell chip, a photovoltaic junction box and an aluminum alloy auxiliary frame. The front plate adopts the above-mentioned blue light protection, high transmittance coated front plate. The first film structure of the blue light protection, high transmittance coated front plate is located close to the solar cell chip side relative to the float glass.

[0112] The preparation process of the blue light protection solar cell assembly comprises the following steps:

[0113] Step a) preparing a light-transmitting solar cell chip.

[0114] The solar cell chip used is a light-transmitting chip provided by a German company (3.2mm thick, glass-based copper indium gallium selenide thin-film solar cell chip). The black area 12 is the area with the cell chip, and the blank area 11 is the light-transmitting area of ​​the array without the chip (the size or shape of the blank area 11 can be adjusted to adjust the chip's light transmittance by adjusting its closeness to the array).

[0115] Step b) Preparation of blue light protection and high sunlight transmittance coated front panel.

[0116] The float glass to be coated is cleaned and dried, and the substrate used is a blank glass substrate with a refractive index n=1.50-2.20 at 550nm, and a thickness d of 0.2mm-10mm;

[0117] The vacuum coating equipment is evacuated. When using magnetron sputtering coating equipment, the vacuum degree of the sputtering chamber should be at least 8.0×10 - 3 Pa or higher;

[0118] The cleaned and dried substrate to be coated is mounted on the substrate rack and then enters the coating chamber.

[0119] The film forming system was introduced for vacuum coating, and the following film system was used: Sub|H(21.78nm)L(75.30nm)H(43.50nm)L((75.31nm)H((21.70nm)|Air. (Sub is the substrate);

[0120] Among them, H is a high refractive index material, and Nb is used. 2 O 5 (niobium pentoxide); L is a low refractive index material, SiO2 (Silicon dioxide); Air is the emitting medium air.

[0121] The anti-blue light film system structure used in the anti-blue light, high-transmittance coated front plate 3 is a regular symmetrical structure, the production is easy to control, and the film system has good stability.

[0122] The anti-blue light, high transmittance coated front plate 3 is coated, the vacuum is broken, the coated substrate is taken out and data detection is performed.

[0123] After coating, the substrate has better anti-blue light effect than the existing technology. In the harmful blue light wavelength range (400nm-440nm), it achieves high reflection and low transmittance (high reflectivity, low transmittance), and has higher transmittance in the beneficial blue light wavelength range (480nm-500nm); in the entire sunlight spectrum range, the sunlight transmittance is as high as over 90%.

[0124] Step c) packaging the blue light protection solar cell assembly.

[0125] The anti-blue light solar cell assembly uses a glass-based copper indium gallium selenide thin-film solar cell chip; the encapsulation film 2 uses a photovoltaic-grade PVB film with a thickness of 1.14 mm (other thicknesses or other encapsulation films, such as PU, SGP, POE, EVA, etc., can also be used); the tempered ultra-clear float glass 31 and the first film structure 32 together form the anti-blue light, high-transmittance coated front plate 3;

[0126] The photovoltaic junction box 4 uses a split junction box (the photovoltaic junction box 4 can also use an integrated type, side-connected type, pen-type, back-connected type, etc. photovoltaic junction box); the photovoltaic junction box 4 and the installation aluminum alloy auxiliary frame 5 are installed last, and they can be installed after the components are laminated, autoclaved, and EL, IV, etc. are tested.

[0127] Step d) Component lamination.

[0128] The specific lamination process parameters are as follows:

[0129]

[0130]

[0131] As shown in the table above, the process parameters of the laminated light-transmitting solar cell module are used. The module is put into the laminator for pre-pressing according to the process in the table above.

[0132] Step e) autoclave pressing of the components.

[0133] The specific autoclave process parameters are as follows:

[0134] Temperature(℃) Time (min) Pressure(MPa) Time (min) 15 / / / 40 15 0.3 20 60 15 0.5 20 90 20 0.8 15 120 25 0.8 20 120 50 0.8 30 90 20 0.8 30 40 30 0.8 30 25 6 0.8 10

[0135] The laminated components are then loaded onto the autoclave workpiece rack and placed into the autoclave for autoclave pressing according to the process parameters in the table above. After autoclave pressing, the excess PVB film on the edge of the components is trimmed.

[0136] Step f) IV and EL testing (power, voltage, current, thermal imaging defect detection and analysis).

[0137] Step g) Attach the frame 5 and apply structural adhesive (two-component silicone structural adhesive).

[0138] Step h) installing the photovoltaic junction box 4.

[0139] Step i) After the structural adhesive is cured, the components are packed and put into storage.

[0140] Embodiment 3

[0141] The blue light protection and high transmittance coated front plate 3 comprises a float glass, and a first film structure is arranged on the float glass. The first film structure comprises three layers of high refractive index film layers and two layers of low refractive index film layers. The coating material used for the high refractive index film layers is Nb 2 O 5 The coating material used for the low refractive index film is SiO 2 , three layers of high refractive index film layers and two layers of low refractive index film layers are distributed in sequence, and the film layers closest to and farthest from the float glass surface are both high refractive index film layers.

[0142] The first film structure includes three high refractive index film layers and two low refractive index film layers, which from the surface of the float glass to the outside are the first high refractive index film layer 32a, the second low refractive index film layer 32b, the third high refractive index film layer 32c, the fourth low refractive index film layer 32d, and the fifth high refractive index film layer 32e.

[0143] The thickness of the first high refractive index film layer 32a is 27.89 nm;

[0144] The thickness of the second low refractive index film layer 32b is 93.29 nm;

[0145] The thickness of the third high refractive index film layer 32c is 55.79 nm;

[0146] The thickness of the fourth low refractive index film layer 32d is 93.38 nm;

[0147] The thickness of the fifth high refractive index film layer 32e is 27.90 nm.

[0148] The blue light protection solar cell assembly comprises a front plate, an encapsulation adhesive film, a solar cell chip, a photovoltaic junction box and an aluminum alloy auxiliary frame. The front plate adopts the above-mentioned blue light protection, high transmittance coated front plate. The first film structure of the blue light protection, high transmittance coated front plate is located close to the solar cell chip side relative to the float glass.

[0149] The preparation process of the blue light protection solar cell assembly comprises the following steps:

[0150] Step a) preparing a light-transmitting solar cell chip.

[0151] The solar cell chip used is a light-transmitting chip provided by a German company (3.2mm thick, glass-based copper indium gallium selenide thin-film solar cell chip). The black area 12 is the area with the cell chip, and the blank area 11 is the light-transmitting area of ​​the array without the chip (the size or shape of the blank area 11 can be adjusted to adjust the chip's light transmittance by adjusting its closeness to the array).

[0152] Step b) Preparation of blue light protection and high sunlight transmittance coated front panel.

[0153] The float glass to be coated is cleaned and dried, and the substrate used is a blank glass substrate with a refractive index n=1.50-2.20 at 550nm, and a thickness d of 0.2mm-10mm;

[0154] The vacuum coating equipment is evacuated. When using magnetron sputtering coating equipment, the vacuum degree of the sputtering chamber should be at least 8.0×10 - 3 Pa or higher;

[0155] The cleaned and dried substrate to be coated is mounted on the substrate rack and then enters the coating chamber.

[0156] The film forming system is introduced for vacuum coating, and the following film system is used: Sub|H(27.89nm)L(93.29nm)H(55.79nm)L(93.38nm)H(27.90nm)|Air. (Sub is the substrate);

[0157] Among them, H is a high refractive index material, and Nb is used. 2 O 5 (niobium pentoxide); L is a low refractive index material, SiO 2 (Silicon dioxide); Air is the emitting medium air.

[0158] The anti-blue light film system structure used in the anti-blue light, high-transmittance coated front plate 3 is a regular symmetrical structure, the production is easy to control, and the film system has good stability.

[0159] The anti-blue light, high transmittance coated front plate 3 is coated, the vacuum is broken, the coated substrate is taken out and data detection is performed.

[0160] After coating, the substrate has better anti-blue light effect than the existing technology. In the harmful blue light wavelength range (400nm-440nm), it achieves high reflection and low transmittance (high reflectivity, low transmittance), and has higher transmittance in the beneficial blue light wavelength range (480nm-500nm); in the entire sunlight spectrum range, the sunlight transmittance is as high as over 90%.

[0161] Step c) packaging the blue light protection solar cell assembly.

[0162] like Figure 8 As shown in the present embodiment: the anti-blue light solar cell assembly uses a light-transmitting chip (3.2 mm thick, glass-based copper indium gallium selenide thin-film solar cell chip); 2 is a packaging film, and a photovoltaic-grade PVB film with a thickness of 1.14 mm is used in this embodiment. Films of other thicknesses or other packaging films may also be used, such as PU, SGP, POE, EVA, etc.; 31 is tempered ultra-white float glass; 32 is a first film structure; the tempered ultra-white float glass and the first film structure together constitute the anti-blue light, high-transmittance coated front panel 3; 6 is ultra-white tempered glass (used as a back panel for solar cell packaging; the back panel used in this embodiment has a thickness of 5 mm); 4 is a photovoltaic junction box; 5 is an aluminum alloy auxiliary frame for installation.

[0163] Step d) Component lamination.

[0164] The specific lamination process parameters are as follows:

[0165]

[0166]

[0167] As shown in the table above, the process parameters of the laminated light-transmitting solar cell module are used. The module is put into the laminator for pre-pressing according to the process in the table above.

[0168] Step e) autoclave pressing of the components.

[0169] The specific autoclave process parameters are as follows:

[0170] Temperature(℃) Time (min) Pressure(MPa) Time (min) 25 / / / 55 25 0.54 30 75 25 1.0 35 110 30 1.2 30 140 35 1.6 30 140 70 1.6 50 110 40 1.6 50 60 45 1.6 50 40 15 1.6 20

[0171] The laminated components are then loaded onto the autoclave workpiece rack and placed into the autoclave for autoclave pressing according to the process parameters in the table above. After autoclave pressing, the excess PVB film on the edge of the components is trimmed.

[0172] Step f) IV and EL testing (power, voltage, current, thermal imaging defect detection and analysis).

[0173] Step g) Attach the frame 5 and apply structural adhesive (two-component silicone structural adhesive).

[0174] Step h) installing the photovoltaic junction box 4.

[0175] Step i) After the structural adhesive is cured, the components are packed and put into storage.

[0176] Embodiment 4

[0177] like Fig. 9 Shown

[0178] The difference between this embodiment and the first embodiment is that: the anti-blue light, high-transmittance coated front plate 3 also includes an AS / AF film;

[0179] The float glass is provided with an AS / AF film on the side away from the first film structure. The AS / AF film layer is realized by vacuum coating. The AS / AF material is placed under ultra-high vacuum conditions (about 8.0×10-3Pa or higher). (or higher) deposition rate to form a dense AS / AF film on 1; or it can be achieved by other means, such as directly spraying AS / AF solution on the outer surface of the float glass to form an AS / AF film layer. The AS / AF film, float glass and the first film structure together constitute the blue light protection, high transmittance coated front plate 33.

[0180] The anti-blue light solar cell module made by using the anti-blue light and high transmittance coated front plate in this embodiment has the functions of scratch resistance, wear resistance, stain resistance, easy cleaning, anti-fingerprint, etc. It can avoid surface contamination or damage, reduce the frequency of manual cleaning of the outer surface of the anti-blue light solar cell module, save manpower and financial resources, etc.

[0181] Embodiment 5

[0182] like Figures 10 to 11 Shown

[0183] The difference between this embodiment and the fourth embodiment is that the blue light protection and high transmittance coated front plate 3 further includes a second film structure 34 .

[0184] A second film structure 34 is also provided between the float glass and the AS / AF film. The second film structure 34 also includes four high-refractive index film layers and four low-refractive index film layers. The coating material used for the high-refractive index film layers is Nb 2 O 5 The coating material used for the low refractive index film layer is SiO 2 ;

[0185] From the float glass to the outside, the sixth high refractive index film layer 34a, the seventh low refractive index film layer 34b, the eighth high refractive index film layer 34c, the ninth low refractive index film layer 34d, the tenth high refractive index film layer 34e, the eleventh low refractive index film layer 34f, the twelfth high refractive index film layer 34g, and the thirteenth low refractive index film layer 34h;

[0186] The thickness of the sixth high refractive index film layer 34a is 12.61 nm;

[0187] The thickness of the seventh low refractive index film layer 34b is 39.72nm;

[0188] The eighth high refractive index film layer 34c has a thickness of 30.25 nm;

[0189] The thickness of the ninth low refractive index film layer 34d is 99.36nm;

[0190] The thickness of the tenth high refractive index film layer 34e is 12.37 nm;

[0191] The thickness of the eleventh low refractive index film layer 34f is 18.23 nm;

[0192] The thickness of the twelfth high refractive index film layer 34g is 23.98nm;

[0193] The thickness of the thirteenth low-refractive-index film layer 34h is 105.70 nm.

[0194] The second film structure 34 is prepared by vacuum magnetron sputtering coating method; the AS / AF film, float glass, the first film structure and the second film structure 34 together constitute the blue light protection and high transmittance coated front plate 3.

[0195] Because the second film structure 34 is plated on the outer surface of the float glass, the reflectivity of about 4% on the glass surface is eliminated, and the sunlight transmittance is further improved, thereby improving the power generation efficiency of the blue light protection solar cell assembly.

[0196] like Fig.12 This is the single-side reflectivity spectrum of the untreated float glass surface. The single-side reflectivity of the float glass surface is about 4%. By coating the glass surface with AR film, the sunlight transmittance can be effectively improved.

[0197] The spectral comparison of the reflectivity of one side of ultra-clear glass without coating and after coating with AR coating is shown in the figure. Fig.13 The second film structure 34 is as follows: Sub|H(12.61nm)L(39.72nm)H(30.25nm)L(99.36nm)H(12.37nm)L(18.23nm)H(23.98nm)L(105.70nm)|Air (H material is Ti3O5; L material is SiO2).

[0198] Embodiment 6

[0199] like Fig.14 Shown

[0200] The only difference between this embodiment and the first embodiment is that the float glass of the anti-blue light, high-transmittance coated front plate 3 has a rough matte surface on the side away from the first film structure, and the matte surface forms a rough surface, which has a matte anti-glare effect; the matte surface, the float glass and the first film structure together constitute the anti-blue light, high-transmittance coated front plate 3.

[0201] The matte surface of float glass is formed in the following ways:

[0202] (1) Using solar ultra-clear rolled glass;

[0203] (2) Use velvet glass;

[0204] (3) Use patterned glass;

[0205] (4) Chemical etching of glass;

[0206] (5) Use surface sandblasted glass; etc.

[0207] The advantages of this embodiment are: due to the matte surface with diffuse reflection, an AG anti-glare effect is formed, the surface specular reflection is eliminated, and it has better environmental friendliness.

[0208] Embodiment 7

[0209] like Fig.15 Shown

[0210] The difference between this embodiment and the sixth embodiment is that the matte surface of the anti-blue light and high-transmittance coated front plate 3 is also provided with an AS / AF film layer.

[0211] AS / AF materials are used under ultra-high vacuum conditions (about 8.0×10-3Pa or higher). (or higher) deposition rate is used to form a dense AS / AF film on 1, or it can be achieved by other means, such as directly spraying AS / AF solution on the matte surface to form an AS / AF film layer; the matte surface is a rough surface formed on the outer surface of the float glass; it has a matte anti-glare effect; the AS / AF film layer, the matte surface, the float glass and the first film structure together constitute the anti-blue light, high-transmittance coated front plate 3.

[0212] Advantages of this embodiment: The anti-blue light solar cell module has the functions of scratch resistance, wear resistance, stain resistance, easy cleaning, anti-fingerprint, etc. It can avoid surface contamination or damage, reduce the frequency of manual cleaning of the outer surface of the anti-blue light solar cell module, save manpower and financial resources, etc. At the same time, because the outer surface of the glass is made into a diffusely reflective matte surface, an AG anti-glare effect is formed, the surface mirror reflection is eliminated, and it has better environmental friendliness.

[0213] Embodiment 8

[0214] The only difference between this embodiment and the first embodiment is that the anti-blue light solar cell assembly replaces the light-transmitting solar cell chip with an opaque solar cell chip (such as copper indium gallium selenide, gallium arsenide, cadmium telluride, monocrystalline silicon, polycrystalline silicon, etc. solar cell chips) to make a pure blue solar cell assembly.

[0215] The above are only eight embodiments of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the principles of the present invention, and these should also be regarded as belonging to the protection scope of the present invention, such as the number of the jet holes 11a, the angle of the jet holes 11a below the drill bit, etc.

Claims

1. A blue light protection, high transmittance coated front plate, comprising float glass, characterized by: The float glass is provided with a first film structure, the first film structure includes a plurality of high refractive index film layers and at least one low refractive index film layer, the coating material used for the high refractive index film layer is Nb2O5, the coating material used for the low refractive index film layer is SiO2, the high refractive index film layer and the low refractive index film layer are sequentially spaced and distributed, and the film layer closest to and farthest from the surface of the float glass are both high refractive index film layers; The first film structure comprises three layers of high refractive index film layers and two layers of low refractive index film layers, namely, a first layer of high refractive index film layer, a second layer of low refractive index film layer, a third layer of high refractive index film layer, a fourth layer of low refractive index film layer, and a fifth layer of high refractive index film layer; The thickness of the first high refractive index film layer is 24.03nm; The thickness of the second low refractive index film layer is 81.85nm; The thickness of the third high refractive index film layer is 48.08nm; The thickness of the fourth low refractive index film layer is 81.85nm; The thickness of the fifth high refractive index film layer is 24.03nm; The float glass is provided with an AS / AF film on a surface away from the first film structure; A second film structure is also provided between the float glass and the AS / AF film, and the second film structure also includes four layers of high refractive index film layers and four layers of low refractive index film layers, the coating material used for the high refractive index film layers is Nb2O5, and the coating material used for the low refractive index film layers is SiO2; From the float glass to the outside, the sixth high refractive index film layer, the seventh low refractive index film layer, the eighth high refractive index film layer, the ninth low refractive index film layer, the tenth high refractive index film layer, the eleventh low refractive index film layer, the twelfth high refractive index film layer, and the thirteenth low refractive index film layer are arranged in order; The thickness of the sixth high refractive index film layer is 12.61nm; The thickness of the seventh low-refractive-index film layer is 39.72 nm; The thickness of the eighth high refractive index film layer is 30.25nm; The thickness of the ninth low-refractive-index film layer is 99.36 nm; The thickness of the tenth high refractive index film layer is 12.37nm; The thickness of the eleventh low refractive index film layer is 18.23nm; The thickness of the twelfth high refractive index film layer is 23.98nm; The thickness of the thirteenth low refractive index film layer is 105.70nm; The surface of the float glass at the side away from the first film structure is a rough matte surface, and an AS / AF film is arranged on the matte surface.

Images