A colored photovoltaic glass, a colored photovoltaic module and a preparation method thereof

Abstract

The present disclosure relates to a colored photovoltaic glass, a colored photovoltaic module and a preparation method thereof. The method comprises the following steps: S1: Printing colored ink on an alcohol flower paper, and then coating a flower paper cover oil, and obtaining a colored flower paper after drying; S2: Placing the colored flower paper in water and transferring it to one side of a glass body, and obtaining a colored photovoltaic glass coated with a colored ink layer after tempering; the average light transmittance of the colored ink layer in the range of 260-1200 nm is 30-95%; the average reflectance is 10-60%. The method of the present disclosure is simple in operation, high in efficiency, low in cost of the obtained colored flower paper, portable, capable of forming rich patterns, and good in color effect and performance of the obtained colored photovoltaic glass.

Description

Technical Field

[0001] The present disclosure relates to the technical field of solar photovoltaic technology, and specifically, to a colored photovoltaic glass, a colored photovoltaic module, and a preparation method thereof. Background Art

[0002] Currently, the demand for photovoltaic products is increasing day by day. The proportion of distributed photovoltaics is increasing year by year, and the demand for colored building integrated photovoltaic (BIPV) modules is growing. Various colored module methods have emerged.

[0003] Currently, in the method of preparing colored crystalline silicon photovoltaic modules, a directly colored adhesive film can be laminated and then the module is colored. However, due to the uneven grid lines on the surface of the battery chip during the lamination process, the problem of uneven color occurs during lamination, and the color effect of the prepared photovoltaic module is poor; or a color film layer is plated on the glass by PVD magnetron sputtering on the battery, but this method has a high cost and great difficulty in actual operation; or in the traditional front plate glass - transparent adhesive film - battery chip - transparent adhesive film - back plate structure, a transparent ceramic color film is prepared by screen printing and then high-temperature tempering on the inner side of the front plate glass close to the battery chip, but this method cannot be prepared in advance and is not portable. Summary of the Invention

[0004] The purpose of the present disclosure is to provide a colored photovoltaic glass, a colored photovoltaic module, and a preparation method thereof. The preparation method has low cost, high efficiency, the prepared colored flower paper has portability, can form rich patterns, and the color effect and light transmittance performance of the prepared colored photovoltaic glass are good.

[0005] To achieve the above purpose, the first aspect of the present disclosure provides a method for preparing colored photovoltaic glass, the method comprising the following steps:

[0006] S1: Printing colored ink on an alcohol flower paper, and then brushing a flower paper cover oil, and obtaining a colored flower paper after drying;

[0007] S2: Placing the colored flower paper in water and transferring it to one side of a glass body, and obtaining a colored photovoltaic glass with a colored ink layer after tempering;

[0008] The average light transmittance of the colored ink layer in the range of 260 - 1200 nm is 30 - 95%; the average reflectance is 10 - 60%.

[0009] Optionally, the printing of the colored ink on the alcohol flower paper in S1 includes one or more of screen printing, inkjet printing, spin coating, knife coating, and digital direct injection; preferably screen printing.

[0010] Optionally, the drying conditions in S1 include: the drying temperature is 20 - 50 °C, and the drying time is 2 - 8 h;

[0011] The transfer time described in S2 is 0.5 to 5 min, preferably 0.5 to 3 min;

[0012] The tempering conditions described in S2 include: the tempering temperature is 680 to 720 °C, and the tempering time is 1 to 10 min.

[0013] Optionally, the color ink includes transparent ink, effect pigment and solvent; relative to 100 parts by weight of the transparent ink, the effect pigment is 0.5 to 60 parts by weight, and the solvent is 0.5 to 60 parts by weight;

[0014] The initial melting temperature of the transparent ink is 650 to 720 °C; the effect pigment includes structural color toner.

[0015] Optionally, relative to 100 parts by weight of the transparent ink, the effect pigment is from 2 to 5 parts by weight, and the solvent is from 5 to 20 parts by weight.

[0016] Optionally, based on the weight of the transparent ink, the transparent ink includes 30 to 65 wt% of silicon dioxide, 0.5 to 15 wt% of aluminum oxide, 5 to 40 wt% of sodium oxide, 2 to 15 wt% of potassium oxide, and 0 to 15 wt% of calcium oxide.

[0017] Optionally, the structural color toner includes a structural color unit having an optical film system structure; the optical film system structure includes an intermediate layer and a first film layer and a second film layer disposed on both sides of the intermediate layer; the first film layer and the second film layer respectively include a plurality of high refractive index sub-layers and low refractive index sub-layers alternately stacked; the high refractive index sub-layers and the low refractive index sub-layers in the first film layer and the second film layer are symmetrically arranged with respect to the intermediate layer as the axis of symmetry; the ratio of the total thickness of the high refractive index sub-layers to the total thickness of the low refractive index sub-layers is 0.1 to 3.8:1, preferably 0.2 to 1.9:1; the outermost sub-layer of the first film layer away from the intermediate layer is a high refractive index sub-layer, and the ratio of the outermost sub-layer of the first film layer to the total thickness of the high refractive index sub-layers in the first film layer is 0.2 to 1.4:1, preferably 0.3 to 0.6:1;

[0018] The refractive index of the high refractive index sub-layer is above 2, preferably 2.5 to 4.9, and the refractive index of the low refractive index sub-layer is below 1.6, preferably 1.4 to 1.6.

[0019] Optionally, the number of layers of the optical film system structure is 5 to 22 layers, preferably 7 to 11 layers; the thickness of the high refractive index sub-layer is 20 to 1000 nm, preferably 80 to 120 nm; the thickness of the low refractive index sub-layer is 20 to 500 nm, preferably 60 to 96 nm.

[0020] The second aspect of the present disclosure provides a colored photovoltaic glass prepared by the method described in the first aspect of the present disclosure.

[0021] The third aspect of the present disclosure provides a colored photovoltaic glass, which includes a glass body and a colored ink layer laminated on one side surface of the glass body; the average light transmittance of the colored ink layer in the range of 260-1200 nm is 30-95%; the average reflectance is 10-60%.

[0022] Optionally, the thickness of the colored ink layer is 10-30 μm; the average light transmittance of the colored ink layer in the range of 260-1200 nm is 65-90%; the average reflectance is 10-30%.

[0023] Optionally, the colored ink layer is formed by the following method: placing a colored flower paper printed with colored ink in water and transferring it to one side of the glass body.

[0024] The fourth aspect of the present disclosure provides a colored photovoltaic module, which includes a first glass layer, a first encapsulant layer, a cell layer, a second encapsulant layer, and a second glass layer laminated; the first glass layer includes the colored photovoltaic glass described in the second or third aspect of the present disclosure; the colored ink layer is close to the cell layer.

[0025] Optionally, the thickness of the first glass layer is 2-10 mm; the thickness of the second glass layer is 2-10 mm;

[0026] The thickness of the first encapsulant layer is 0.2-2 nm; the thickness of the second encapsulant layer is 0.2-2 nm.

[0027] Optionally, the second encapsulant layer includes a plurality of encapsulant sub-layers; the thickness of the encapsulant sub-layer is 0.2-2 mm; the encapsulant sub-layer is a transparent encapsulant sub-layer or a black encapsulant sub-layer.

[0028] Through the above technical solutions, the method of the present disclosure makes a colored flower paper by printing colored ink on an alcohol flower paper, and then transfers the colored flower paper to the glass body and tempering to obtain a colored photovoltaic glass; the method of the present disclosure has low cost and high efficiency, the obtained colored flower paper has portability and diversity, and the color effect and light transmission performance of the obtained colored photovoltaic glass are good.

[0029] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0030] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0031] Figure 1 It is a graph of the reflectance and transmittance of the colored photovoltaic glass in Embodiment 1 of the present disclosure.

[0032] Figure 2 It is a graph of the reflectance and transmittance of the colored photovoltaic glass in Embodiment 2 of the present disclosure.

[0033] Figure 3 It is a schematic structural diagram of a colored photovoltaic module of the present disclosure.

[0034] Description of reference numerals

[0035] 1: First glass layer; 11: Glass body; 12: Colored ink layer; 2: First encapsulant layer; 3: Cell layer; 4: Second encapsulant layer; 41: Transparent encapsulant sub-layer; 42: Black encapsulant sub-layer; 43: Transparent encapsulant sub-layer; 5: Second glass layer. Detailed implementation manners

[0036] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0037] The first aspect of the present disclosure provides a method for preparing colored photovoltaic glass, and the method includes the following steps:

[0038] S1: Print colored ink on an alcohol transfer paper, and then coat the cover oil of the transfer paper. After drying, a colored transfer paper is obtained;

[0039] S2: Place the colored transfer paper in water and transfer it to one side of the glass body. After tempering, a colored photovoltaic glass with a colored ink layer is obtained;

[0040] The average transmittance of the colored ink layer in the range of 260 - 1200 nm is 30 - 95%; the average reflectance is 10 - 60%. The method of the present disclosure has low production cost and high efficiency. The obtained colored transfer paper has portability and diversity, and the color effect and light transmittance performance of the obtained colored photovoltaic glass are good.

[0041] In the present disclosure, the alcohol transfer paper is a polyvinyl butyral film transfer paper, also called "overglaze transfer paper". It uses butyral and alcohol as raw materials to make a film as the base paper.

[0042] According to an embodiment of the present disclosure, the printing of the colored ink on the alcohol transfer paper in S1 includes one or more of screen printing, inkjet printing, spin coating, knife coating, and digital direct injection; preferably screen printing. In a further embodiment, the mesh number of the screen printing is 100 - 400 mesh, preferably 150 - 350 mesh.

[0043] According to an embodiment of the present disclosure, the drying conditions in S1 include: the drying temperature is 20 to 50 °C, preferably 20 to 40 °C; the drying time is 2 to 8 h, preferably 4 to 7 h.

[0044] According to an embodiment of the present disclosure, the transfer time in S2 is 0.5 to 5 min, preferably 0.5 to 3 min. The above embodiment is beneficial to removing the bubbles generated during lamination.

[0045] According to an embodiment of the present disclosure, the tempering conditions in S2 include: the tempering temperature is 650 to 750 °C, preferably 680 to 720 °C; the tempering time is 1 to 10 min, preferably 1 to 5 min. The above embodiment is beneficial to improving the glass strength, ensuring that the color ink layer is more firmly attached to the glass body, and is beneficial to increasing the strength and acid and alkali resistance of the color ink layer.

[0046] According to an embodiment of the present disclosure, the color ink includes transparent ink, effect pigment and solvent; relative to 100 parts by weight of the transparent ink, the effect pigment is 0.5 to 60 parts by weight, and the solvent is 0.5 to 60 parts by weight; the initial melting temperature of the transparent ink is 650 to 720 °C; the effect pigment includes structural color powder. Preferably, relative to 100 parts by weight of the transparent ink, the effect pigment is 2 to 5 parts by weight, and the solvent is 5 to 20 parts by weight. The above embodiment is beneficial to the prepared color photovoltaic glass having good color effect and light transmittance performance, further making the color photovoltaic module have good color effect and light transmittance performance, and the photoelectric efficiency of the color photovoltaic module is higher.

[0047] According to an embodiment of the present disclosure, the structural color powder includes a structural color unit having an optical film system structure; the optical film system structure includes an intermediate layer and a first film layer and a second film layer provided on both sides of the intermediate layer; the first film layer and the second film layer respectively include a plurality of high refractive index sub-layers and low refractive index sub-layers alternately stacked; the high refractive index sub-layers and low refractive index sub-layers in the first film layer and the second film layer are symmetrically arranged with the intermediate layer as the axis of symmetry; the ratio of the total thickness of the high refractive index sub-layers to the total thickness of the low refractive index sub-layers is 0.1 to 3.8:1, preferably 0.2 to 1.9:1; the outermost sub-layer of the first film layer away from the intermediate layer is a high refractive index sub-layer, and the ratio of the outermost sub-layer of the first film layer to the total thickness of the high refractive index sub-layers in the first film layer is 0.2 to 1.4:1, preferably 0.3 to 0.6:1;

[0048] The refractive index of the high refractive index sub-layer is above 2, preferably 2.5 to 4.9, and the refractive index of the low refractive index sub-layer is below 1.6, preferably 1.4 to 1.6. The above embodiments are conducive to the colored photovoltaic glass obtained having better color effects and light transmittance properties, further enabling the colored photovoltaic module to have better color effects and light transmittance properties, and the colored photovoltaic module having higher photoelectric efficiency.

[0049] According to an embodiment of the present disclosure, the intermediate layer can be a high refractive index sub-layer or a low refractive index sub-layer. The refractive index of the high refractive index sub-layer is above 2, and the refractive index of the low refractive index sub-layer is below 1.6. In the embodiment where the intermediate layer is a high refractive index sub-layer, the total thickness of the high refractive index sub-layer with a refractive index above 2 includes the thickness of the intermediate layer; in the embodiment where the intermediate layer is a low refractive index sub-layer, the total thickness of the low refractive index sub-layer with a refractive index below 1.6 includes the thickness of the intermediate layer.

[0050] According to another embodiment of the present disclosure, the ratio of the total thickness of the high refractive index sub-layer to the total thickness of the low refractive index sub-layer is 0.1 to 1.4:1, preferably 0.6 to 1.2:1; the ratio of the thickness of the outermost sub-layer of the first film layer to the total thickness of the high refractive index sub-layer in the first film layer is 0.2 to 0.55:1. The above embodiments are conducive to the structural color pigment having a relatively high peak reflectivity, average transmittance, and peak transmittance, further conducive to the colored photovoltaic module simultaneously having a relatively high transmittance and good color effects, and further improving the photoelectric conversion efficiency of the colored photovoltaic module.

[0051] According to an embodiment of the present disclosure, the number of layers of the optical film system structure is 5 to 22 layers, preferably 7 to 11 layers; the thickness of the high refractive index sub-layer is 20 to 1000 nm, preferably 80 to 120 nm; the thickness of the low refractive index sub-layer is 20 to 500 nm, preferably 60 to 96 nm.

[0052] In a further embodiment, the material of the high refractive index layer is selected from at least one of lanthanum titanate, titanium pentoxide, niobium pentoxide, zinc sulfide, zinc oxide, zirconium oxide, titanium dioxide, carbon, indium oxide, indium tin oxide, tantalum pentoxide, cerium oxide, yttrium oxide, europium oxide, iron oxide, iron trioxide, hafnium nitride, hafnium carbide, hafnium oxide, lanthanum oxide, magnesium oxide, neodymium oxide, praseodymium oxide, samarium oxide, antimony trioxide, silicon carbide, silicon nitride, silicon monoxide, selenium trioxide, tin oxide or tungsten trioxide; the material of the low refractive index layer is selected from at least one of silicon dioxide, aluminum oxide, magnesium fluoride, aluminum fluoride, cerium fluoride, lanthanum fluoride, neodymium fluoride, samarium fluoride, barium fluoride, calcium fluoride or lithium fluoride. The above embodiments are beneficial to the prepared colored photovoltaic glass having good color effects and light transmittance performance, further enabling the colored photovoltaic module to have good color effects and light transmittance performance, and the colored photovoltaic module having higher photoelectric efficiency.

[0053] According to the present disclosure, in an embodiment of the red structural color powder, the material of the high refractive index sub-layer can be selected from at least one of iron oxide, niobium pentoxide, titanium pentoxide, iron trioxide and titanium dioxide; the material of the low refractive index sub-layer is selected from at least one of silicon dioxide, magnesium fluoride and aluminum fluoride.

[0054] According to the present disclosure, in an embodiment of the blue structural color powder, the material of the high refractive index sub-layer can be preferably selected from at least one of titanium pentoxide, niobium pentoxide, titanium dioxide and iron oxide; the material of the low refractive index sub-layer is selected from at least one of silicon dioxide, aluminum oxide and magnesium fluoride.

[0055] According to the present disclosure, in an embodiment of the green structural color powder, the material of the high refractive index sub-layer can be preferably selected from at least one of titanium pentoxide, niobium pentoxide, titanium dioxide and iron oxide; the material of the low refractive index sub-layer is selected from at least one of silicon dioxide, aluminum oxide and magnesium fluoride.

[0056] In an embodiment, the structural color powder can be a structural color powder made by alternately stacking high refractive index layers and low refractive index layers and then using PVD methods such as magnetron sputtering or electron beam evaporation. The particle size of the structural color powder can be 20 to 120 μm.

[0057] According to an embodiment of the present disclosure, based on the weight of the transparent ink, the transparent ink includes 30 to 65 wt% of silicon dioxide, 0.5 to 15 wt% of aluminum oxide, 5 to 40 wt% of sodium oxide, 2 to 15 wt% of potassium oxide, and 0 to 15 wt% of calcium oxide.

[0058] According to an embodiment of the present disclosure, the transparent ink further includes one or more of titanium oxide, zinc oxide, zirconium oxide, barium oxide, magnesium oxide, phosphorus pentoxide, sulfur trioxide, and bismuth oxide.

[0059] In a further embodiment, based on the weight of the transparent ink, the transparent ink includes 45-55 wt% of silica, 0.5-2 wt% of alumina, 10-20 wt% of sodium oxide, 1-5 wt% of titanium oxide, 15-20 wt% of zinc oxide, 2-5 wt% of potassium oxide, 0.1-2 wt% of zirconium oxide, 1-3 wt% of barium oxide, and 0-1 wt% of calcium oxide, magnesium oxide, phosphorus pentoxide, sulfur trioxide, and bismuth oxide.

[0060] According to an embodiment of the present disclosure, the color ink includes pearlescent pigments, and the pearlescent pigments include a substrate and a coating layer. The substrate is selected from one or more of synthetic or natural mica, glass flakes, SiO2 flakes, Al2O3 flakes, TiO2 flakes, liquid crystal polymers, holographic pigments, BiOCl flakes, and aluminum flakes; the coating layer includes one or more transparent or semi-transparent layers, and the layer contains metal oxides, metal oxide hydrates, gold hydroxides, metal suboxides, metal fluorides, metal nitrides, metal oxynitrides, or mixtures of these materials.

[0061] According to an embodiment of the present disclosure, the solvent can be one or more of diethylene glycol dimethyl ether, methyl cellulose solution, glycol acrylate, functional acrylate, and coupling agent. The above embodiment is beneficial to uniformly mixing the structural color toner with the transparent ink.

[0062] The second aspect of the present disclosure provides a colored photovoltaic glass prepared by the method described in the first aspect of the present disclosure.

[0063] The third aspect of the present disclosure provides a colored photovoltaic glass, which includes a glass body and a colored ink layer laminated on one side surface of the glass body; 30-95% of the colored ink layer is within the range of 260-1200 nm; the average reflectance is 10-60%. The colored photovoltaic glass of the present disclosure has a good color effect and good light transmittance performance, further enabling the colored photovoltaic module to have a good color effect and light transmittance performance, and the colored photovoltaic module has higher photoelectric efficiency.

[0064] According to an embodiment of the present disclosure, the thickness of the colored ink layer is 10-30 μm; the average light transmittance of the colored ink layer within the range of 260-1200 nm is 65-90%; the average reflectance is 10-30%. The above embodiment is beneficial for the colored photovoltaic module to have a good color effect and light transmittance performance.

[0065] According to an embodiment of the present disclosure, the colored ink layer is formed by the following method: placing a colored decorative paper printed with colored ink in water and transferring it to one side of the glass body.

[0066] The fourth aspect of the present disclosure provides a colored photovoltaic module, which includes a first glass layer, a first encapsulant layer, a cell layer, a second encapsulant layer, and a second glass layer stacked; the first glass layer includes the colored photovoltaic glass described in the second or third aspect of the present disclosure; the colored ink layer is close to the cell layer. The colored photovoltaic module of the present disclosure has good color effects and light transmittance performance.

[0067] According to an embodiment of the present disclosure, the thickness of the first glass layer is 2 - 10 mm, preferably 2 - 6 mm; the thickness of the second glass layer is 2 - 10 mm, preferably 2 - 6 mm; the thickness of the first encapsulant layer is 0.2 - 2 nm, preferably 0.4 - 0.6 mm; the thickness of the second encapsulant layer is 0.2 - 2 nm, preferably 0.4 - 0.6 mm. The above embodiments are conducive to enabling the colored photovoltaic module to have good light transmittance performance.

[0068] According to an embodiment of the present disclosure, the second encapsulant layer includes a plurality of encapsulant sub - layers; the thickness of the encapsulant sub - layer is 0.2 - 2 mm, preferably 0.2 - 0.6 mm; the encapsulant sub - layer is a transparent encapsulant sub - layer or a black encapsulant sub - layer. The above embodiments are conducive to increasing the impact resistance of the colored photovoltaic module and are conducive to improving the color rendering effect of the colored photovoltaic module.

[0069] According to an embodiment of the present disclosure, the transparent encapsulant and the black encapsulant are polymer films, and the transparent encapsulant and the black encapsulant are each independently selected from polyolefin polymers or copolymers, especially polyethylene polymers or copolymers, including but not limited to polyethylene, ethylene vinyl acetate (EVA), ethylene butyl acrylate (EBA), ethylene methyl acrylate (EMA), ethylene ethyl acrylate (EEA), polyolefin elastomer (POE), polyolefin copolymer (BPO), ethylene - tetrafluoroethylene copolymer (ETFE), polyethylene terephthalate film (PET), epoxy resin film (EP), polyvinyl butyral (PVB), thermoplastic polyurethane (TPU). Preferably, the black encapsulant is selected from one of EP film, black PVB encapsulant film, black EVA encapsulant film or black POE encapsulant film; the transparent encapsulant is selected from one of POE, EVA, PVB or ETFE.

[0070] The fifth aspect of the present disclosure provides a method for preparing the colored photovoltaic module described in the fourth aspect of the present disclosure, and the method includes laminating the first glass layer, the first encapsulant layer, the cell layer, the second encapsulant layer, and the second glass layer.

[0071] The present disclosure will be further described below through examples, but the present disclosure is not limited thereby.

[0072] In the examples, the alcohol transfer paper used was purchased from the small film transfer paper base paper of Changhui Transfer Paper Company; the blue pearlescent pigment used was the blue pearlescent powder of Kuncai, with the product number PLOVENCE1045-R5.

[0073] In the examples of the present disclosure, the performance of the colored photovoltaic glass was measured on an ultraviolet-visible-near-infrared spectrophotometer of model TP760.

[0074] Unless otherwise specified, the remaining chemical reagents used in the examples were all commercially available products.

[0075] Example 1

[0076] A colored ink was prepared by mixing transparent ink A, blue structural color powder A and a solvent in a ratio of 100:4:4. The solvent was diethylene glycol dimethyl ether.

[0077] S1: The colored ink was screen-printed onto the alcohol transfer paper through a 200-mesh screen. A layer of transfer paper cover oil was then brushed onto the screen-printed alcohol transfer paper, and then dried at 30 °C to obtain a colored transfer paper.

[0078] S2: The colored transfer paper was cut into a suitable size, then placed in water. After 1 minute, the alcohol transfer paper separated, and the colored ink layer was transferred onto the glass. After tempering at a constant temperature of 700 °C, a colored photovoltaic glass was obtained.

[0079] A colored photovoltaic module was laminated according to the structure of colored photovoltaic glass, transparent adhesive film, cell, transparent adhesive film, black adhesive film, transparent adhesive film, and backplane glass.

[0080] The component contents of transparent ink A are shown in Table 1.

[0081] Table 1

[0082] Transparent ink composition Weight content (%) Transparent ink composition Weight content (%) <![CDATA[SiO2]]> 52.4 ZnO 17.82 <![CDATA[Al2O3]]> 1.55 <![CDATA[ZrO2]]> 1.38 <![CDATA[Fe2O3]]> 0.1 BaO 2.23 CaO 0.1 <![CDATA[Bi2O3]]> 0.04 MgO 0.29 <![CDATA[K2O]]> 3.54 <![CDATA[Na2O]]> 15.68 <![CDATA[P2O5]]> 0.06 <![CDATA[SO3]]> 0.08 <![CDATA[TiO2]]> 4.74

[0083] The structure of blue structural color powder A is shown in Table 2. The ratio of the total thickness of the Ti3O5 layer to the total thickness of the SiO2 layer is 0.66:1, and the ratio of the first layer to the total thickness of the high refractive index sublayer in the first film layer is 0.38:1.

[0084] Table 2

[0085] Number of layers Blue structural color toner Thickness (nm) Layer 1 Titanium pentoxide 22 Layer 2 Silicon dioxide 58 Layer 3 Titanium pentoxide 36 Layer 4 Silicon dioxide 58 Layer 5 (intermediate layer) Titanium pentoxide 36 Layer 6 Silicon dioxide 58 Layer 7 Titanium pentoxide 36 Layer 8 Silicon dioxide 58 Layer 9 Titanium pentoxide 22

[0086] Example 2

[0087] The method of this embodiment is the same as that of Embodiment 1, except that the blue structural color toner A is replaced with a green structural color. The structure and film layer thickness of the green structural color toner are shown in Table 3. The ratio of the total thickness of the Ti3O5 layer to the total thickness of the SiO2 layer is 3.40:1, and the ratio of the first layer to the total thickness of the high refractive index sub-layers in the first film layer is 0.45:1.

[0088] Table 3

[0089]

[0090]

[0091] Embodiment 3

[0092] The method of this embodiment is the same as that of Embodiment 1, except that the transparent ink, blue structural color toner A, and solvent are formulated into a colored ink in a ratio of 100:8:8.

[0093] Embodiment 4

[0094] The method of this embodiment is the same as that of Embodiment 1, except that the blue structural color toner A is replaced with blue structural color B. The structure and film layer thickness of the blue structural color toner B are shown in Table 4. The ratio of the total thickness of the Ti3O5 layer to the total thickness of the SiO2 layer is 0.84:1, and the ratio of the first layer to the total thickness of the high refractive index sub-layers in the first film layer is 0.38:1.

[0095] Table 4

[0096]

[0097] Embodiment 5

[0098] The method of this embodiment is the same as that of Embodiment 1, except that the transparent ink A is replaced with transparent ink B. The weight content of each component of transparent ink B is shown in Table 5.

[0099] Table 5

[0100]

[0101]

[0102] Embodiment 6

[0103] The method of this embodiment is the same as that of Embodiment 1, except that the blue structural color toner A is replaced with a blue pearlescent pigment.

[0104] Embodiment 7

[0105] The method of this embodiment is the same as that of Embodiment 1, except that the blue structural color toner A is replaced with a red structural color toner. The total thickness ratio of the Fe2O3 layer to the SiO2 layer is 1.56:1, the total thickness ratio of the first layer to the high refractive index sub-layer in the first film layer is 0.5:1, and the structure and film layer thickness of the red structural color toner are shown in Table 6.

[0106] Table 6

[0107] Number of layers Red structural color toner Thickness (nm) Layer 1 <![CDATA[Fe2O3]]> 100 Layer 2 <![CDATA[SiO2]]> 80 Layer 3 <![CDATA[Fe2O3]]> 100 Layer 4 <![CDATA[SiO2]]> 80 Layer 5 (intermediate layer) <![CDATA[Fe2O3]]> 100 Layer 6 <![CDATA[SiO2]]> 80 Layer 7 <![CDATA[Fe2O3]]> 100 Layer 8 <![CDATA[SiO2]]> 80 Layer 9 <![CDATA[Fe2O3]]> 100

[0108] Example 8

[0109] The method of this embodiment is the same as that of Embodiment 1, except that the total thickness ratio of the Fe2O3 layer to the SiO2 layer is 5:1, the total thickness ratio of the first layer to the high refractive index sub-layer in the first film layer is 0.5:1, and the structure and film layer thickness of the red structural color toner are shown in Table 7.

[0110] Table 7

[0111] Number of layers Red structural color toner Thickness (nm) Layer 1 <![CDATA[Fe2O3]]> 200 Layer 2 <![CDATA[SiO2]]> 50 Layer 3 <![CDATA[Fe2O3]]> 200 Layer 4 <![CDATA[SiO2]]> 50 Layer 5 (intermediate layer) <![CDATA[Fe2O3]]> 200 Layer 6 <![CDATA[SiO2]]> 50 Layer 7 <![CDATA[Fe2O3]]> 200 Layer 8 <![CDATA[SiO2]]> 50 Layer 9 <![CDATA[Fe2O3]]> 200

[0112] Comparative Example 1

[0113] The method of this embodiment is the same as that of Embodiment 5, except that the color ink is directly screen printed on the glass.

[0114] Test Example 1

[0115] The colored photovoltaic glasses in Examples 1 to 8 and Comparative Example 1 were placed on an ultraviolet spectrophotometer for testing, and the test results are shown in Table 8.

[0116] Table 8

[0117]

[0118]

[0119] According to the data in Table 8, the method of the present disclosure is simple to operate, has a low production cost, is not easy to damage the photovoltaic glass, and the average light transmittance and average reflectance of the prepared colored photovoltaic module can achieve effects comparable to those of the prior art. By comparing Example 1 and Example 3, it can be seen that under the weight ratio of the preferred colored ink of the present disclosure, the color effect of the prepared colored photovoltaic module is better. By comparing Example 1 and Example 4, it can be seen that under the structural characteristics of the structural color powder defined in the present disclosure, the color effect and light transmittance performance of the prepared colored photovoltaic module are better. By comparing Example 1 and Example 5, it can be seen that under the weight ratio of the preferred transparent ink of the present disclosure, the color effect and light transmittance performance of the prepared colored photovoltaic module are better. By comparing Example 1 and Example 6, it can be seen that under the composition of the preferred colored ink of the present disclosure, the color effect and light transmittance performance of the prepared colored photovoltaic module are better. By comparing Example 7 and Example 8, it can be seen that within the range of the ratio of the total thickness of the high refractive index sublayer to the total thickness of the low refractive index sublayer of the structural color powder described in the present disclosure, the color effect and light transmittance performance of the prepared colored photovoltaic module are better.

[0120] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0121] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0122] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A method for preparing colored photovoltaic glass, characterized in that: The method comprises the following steps: S1: printing colored ink on alcohol decal paper, then applying decal paper cover oil, and drying to obtain colored decal paper; S2: placing the colored flower paper in water and transferring it onto one side of the glass body, and then tempering the glass to obtain a colored photovoltaic glass covered with a colored ink layer; The color ink layer has an average transmittance of 30-95% in the range of 260-1200 nm and an average reflectivity of 10-60%. The color ink includes effect pigments, and the effect pigments include structural color powders; the structural color powders include structural color units having an optical film system structure; the optical film system structure includes an intermediate layer and a first film layer and a second film layer arranged on both sides of the intermediate layer; the first film layer and the second film layer respectively include a plurality of high refractive index sublayers and low refractive index sublayers alternately stacked; the high refractive index sublayers and low refractive index sublayers in the first film layer and the second film layer are symmetrically arranged with the intermediate layer as the symmetry axis; the ratio of the total thickness of the high refractive index sublayer to the total thickness of the low refractive index sublayer is 0.1~3.8:1; the refractive index of the high refractive index sublayer is above 2, and the refractive index of the low refractive index sublayer is below 1.

6.

2. The method according to claim 1, wherein The step of printing the colored ink on the alcohol paper in S1 includes one or more of screen printing, inkjet printing, spin coating, doctor blade coating and digital direct printing.

3. The method according to claim 2, wherein: The step of printing the colored ink on the alcohol paper as described in S1 includes screen printing.

4. The method according to claim 1, wherein The drying conditions described in S1 include: a drying temperature of 20 to 50° C. and a drying time of 2 to 8 hours; The transfer time in S2 is 0.5 to 5 minutes; The tempering conditions described in S2 include: a tempering temperature of 680-720° C. and a tempering time of 1-10 minutes.

5. The method according to claim 1, wherein The transfer time in S2 is 0.5 to 3 minutes.

6. The method according to claim 1, wherein The color ink further comprises a transparent ink and a solvent; with respect to 100 parts by weight of the transparent ink, the effect pigment is 0.5 to 60 parts by weight, and the solvent is 0.5 to 60 parts by weight; The transparent ink has an initial melting temperature of 650-720°C.

7. The method according to claim 6, wherein: With respect to 100 parts by weight of the transparent ink, the effect pigment is 2 to 5 parts by weight, and the solvent is 5 to 20 parts by weight.

8. The method according to claim 6, wherein: Based on the weight of the transparent ink, the transparent ink includes 30-65 wt% of silicon dioxide, 0.5-15 wt% of aluminum oxide, 5-40 wt% of sodium oxide, 2-15 wt% of potassium oxide, and 0-15 wt% of calcium oxide.

9. The method according to claim 1, wherein The outermost sublayer in the first film layer away from the middle layer is a high refractive index sublayer, and the total thickness ratio of the outermost sublayer of the first film layer to the high refractive index sublayer in the first film layer is 0.2~1.4:

1.

10. The method according to claim 9, wherein: The ratio of the total thickness of the high refractive index sublayer to the total thickness of the low refractive index sublayer is 0.2-1.9:1; The ratio of the total thickness of the outermost sublayer of the first film layer to the high refractive index sublayer in the first film layer is 0.3-0.6:1; The refractive index of the high refractive index sublayer is 2.5-4.9; the refractive index of the low refractive index sublayer is 1.4-1.

6.

11. The method according to claim 1, wherein The number of layers of the optical film structure is 5 to 22; the thickness of the high refractive index sublayer is 20 to 1000 nm; and the thickness of the low refractive index sublayer is 20 to 500 nm.

12. The method according to claim 11, wherein The number of layers of the optical film structure is 7 to 11; the thickness of the high refractive index sublayer is 80 to 120 nm; and the thickness of the low refractive index sublayer is 60 to 96 nm.

13. Colored photovoltaic glass prepared by the method according to any one of claims 1 to 12.

14. The colored photovoltaic glass according to claim 13, characterized in that: The colored photovoltaic glass includes a glass body and a colored ink layer stacked on one side surface of the glass body.

15. The colored photovoltaic glass according to claim 14, wherein: The thickness of the color ink layer is 10-30 μm; the average light transmittance of the color ink layer in the range of 260-1200 nm is 65-90%; and the average reflectivity is 10-30%.

16. A color photovoltaic module, characterized in that: The colored photovoltaic module comprises a first glass layer, a first adhesive film layer, a cell layer, a second adhesive film layer, and a second glass layer that are stacked; the first glass layer comprises the colored photovoltaic glass according to any one of claims 13 to 15; The color ink layer is close to the battery layer.

17. The colored photovoltaic module according to claim 16, wherein: The thickness of the first glass layer is 2-10 mm; the thickness of the second glass layer is 2-10 mm; The thickness of the first adhesive film layer is 0.2-2 nm; the thickness of the second adhesive film layer is 0.2-2 nm.

18. The colored photovoltaic module according to claim 16, wherein: The second adhesive film layer includes a plurality of adhesive film sub-layers; the thickness of the adhesive film sub-layers is 0.2-2 mm; and the adhesive film sub-layers are transparent adhesive film sub-layers or black adhesive film sub-layers.

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