Photovoltaic glaze as well as preparation method and application thereof

Abstract

The invention discloses photovoltaic glaze as well as a preparation method and application thereof, and belongs to the technical field of photovoltaic glass. According to the photovoltaic glaze and the preparation method thereof provided by the invention, the preparation raw materials comprise a solvent, poly (4-hydroxy-2, 2, 6, 6-tetramethyl-1-piperidine ethanol) succinate and a dispersing agent; and the fluxing agent is prepared from the following raw materials: SiO2, Na2O, B2O3, Sm2O3, Bi2O3 and ZnO. The anti-PID performance, the overall stability and the power generation efficiency of the all-black photovoltaic module are improved by regulating and controlling the content of B2O3 in the fluxing agent, utilizing the stability of rare earth Sm2O3 and selecting poly (4-hydroxy-2, 2, 6, 6-tetramethyl-1-piperidine ethanol) ester as varnish synthetic resin.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic glass technology, and in particular to a photovoltaic glaze, its preparation method, and its application. Background Technology

[0002] Solar photovoltaic (PV) technology, as a key renewable energy technology, is projected to contribute over 50% of electricity generation by 2050. Solar PV power generation is an important form of green energy. In PV systems, photovoltaic cells are placed on a backsheet of glass, creating gaps in the cells. Printing a grid-like pattern of high-reflectivity glaze film on these gaps can increase the power output of the module by up to 2%. Research shows that for every 1% increase in solar PV cell efficiency, the cost of power generation can decrease by 7%, thus demonstrating the significant economic benefits of high-reflectivity glaze film. To meet market demand for black PV roofs and lead the trend in technological aesthetics, all-black PV modules have emerged. In stark contrast to the blue monocrystalline cells, white backsheets, and metallic frames of traditional solar modules, all-black modules utilize a professional blackening treatment of the cells to achieve a pure black appearance, breaking free from the constraints of traditional designs. By selecting frame materials such as polyurethane (PU), aluminum, and steel, the design can flexibly adapt to the needs of different scenarios and styles. Simultaneously, thinner battery busbars enable more integrated modules, providing a unique aesthetic design solution for rooftop PV systems. Beneath the aesthetically pleasing all-black appearance of these modules, their high reliability and power generation efficiency primarily rely on PID performance optimization. Potential-induced degradation (PID) is a characteristic of photovoltaic panels, referring to the phenomenon where high voltage flowing through solar cell units in high-temperature and high-humidity environments leads to a decrease in output power. In practical applications in the European photovoltaic market, because industrial solar systems often operate at higher voltages, most photovoltaic modules exhibit PID after five years of installation, becoming a serious problem. Therefore, there is an urgent need to design all-black modules that can improve power generation efficiency and lifespan to meet the needs of everyday users.

[0003] In existing technologies, the photovoltaic module encapsulation process consists of five layers, from the outside in: glass, ethylene-vinyl acetate copolymer (EVA), solar cells, EVA, and backsheet. Because EVA material cannot provide complete insulation, especially in humid environments, moisture can penetrate the module through silicone or the backsheet, causing leakage current in the encapsulation material's insulation system. Simultaneously, under humid conditions, the ester bonds in EVA decompose, producing freely moving acetic acid. This acetic acid reacts with an alkali on the glass surface to generate sodium ions. Under an applied electric field, these sodium ions migrate to the surface of the solar cells and accumulate in the anti-reflection layer, thus triggering the PID (Potential Inversion Discharge) phenomenon. Therefore, solving the problems of low power generation efficiency, poor PID resistance, and insufficient coating durability in all-black photovoltaic modules is of paramount importance. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a photovoltaic glaze, its preparation method, and its application. By controlling the B2O3 content in the flux and utilizing the stability of rare earth Sm2O3 for addition, and by selecting polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester as the ink-sizing resin, the anti-PID performance, overall stability, and power generation efficiency of the all-black photovoltaic module are improved.

[0005] The present invention also provides a method for preparing the above-mentioned photovoltaic glaze.

[0006] The present invention also provides a photovoltaic backsheet glass, including a backsheet glass and an enamel layer disposed on the surface of the backsheet glass, wherein the enamel layer is formed by a photovoltaic enamel.

[0007] The present invention also provides a double-glass photovoltaic module, including a photovoltaic backsheet glass.

[0008] According to a first aspect of the present invention, a photovoltaic glaze is provided, the raw materials for its preparation including: ink oil and flux;

[0009] The raw materials for preparing the ink include: solvent, polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, and dispersant;

[0010] The raw materials for preparing the flux include: SiO2, Na2O, B2O3, Sm2O3, Bi2O3 and ZnO.

[0011] By using poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester as a hindered amine light stabilizer, the chemical stability and antioxidant properties of the glaze are enhanced. This effectively inhibits the reaction between acetic acid produced by EVA decomposition and the alkali on the glass surface to generate sodium ions, reducing the migration of sodium ions to the antireflection layer of the cell under the action of an electric field, thereby significantly improving the anti-PID performance of the photovoltaic module. At the same time, B2O3 in the flux lowers the melting point of the glaze and improves the coating uniformity, while the rare earth stability of Sm2O3 enhances chemical inertness. The synergistic effect of SiO2, Na2O, Bi2O3 and ZnO improves the mechanical strength, acid and alkali resistance and high reflectivity of the glaze, thereby improving the power generation efficiency and durability of the all-black photovoltaic module.

[0012] According to some embodiments of the present invention, the raw materials for preparing the flux, by weight, include: 36-59 parts SiO2, 8-14 parts Na2O, 3-20 parts B2O3, 0.3-1.5 parts Sm2O3, 1-3 parts Bi2O3 and 5-10 parts ZnO.

[0013] By precisely controlling the proportions of each component, especially the content of B2O3 and Sm2O3, the performance of the glaze is significantly improved. From a mechanistic perspective, SiO2 provides structural stability as a framework material, Na2O lowers the melting point and enhances fluidity, B2O3 optimizes the uniformity and density of the coating by forming a low-melting-point glass phase, and the rare-earth stability of Sm2O3 effectively inhibits ion migration under high temperature and high humidity conditions, reducing the PID effect. The synergistic effect of the above components gives the glaze high reflectivity, excellent adhesion (5B), hardness (5H), and resistance to high temperature and high humidity, ultraviolet radiation, and thermal cycling, thereby significantly improving the power generation efficiency, anti-PID performance, and long-term durability of the all-black photovoltaic module.

[0014] According to some embodiments of the present invention, the raw materials for preparing the flux, by weight, include: 36-59 parts SiO2, 8-14 parts Na2O, 16-18 parts B2O3, 1.1-1.3 parts Sm2O3, 1-3 parts Bi2O3 and 5-10 parts ZnO.

[0015] According to some embodiments of the present invention, the dispersant includes at least one of isopropanol, polyethylene glycol, and triethanolamine.

[0016] According to some embodiments of the present invention, the raw materials for preparing the photovoltaic glaze further include: pigments;

[0017] The pigment includes at least one of titanium dioxide, copper, and chromium.

[0018] According to some embodiments of the present invention, the raw materials for preparing photovoltaic glaze, by weight, include: 1-10 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 5-10 parts of isopropanol, 5-10 parts of terpineol, 40-70 parts of flux, and 5-15 parts of titanium dioxide.

[0019] According to some embodiments of the present invention, the raw materials for preparing photovoltaic glaze, by weight, include: 7-8 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 6-7 parts of isopropanol, 6-7 parts of terpineol, 60-70 parts of flux, and 13-15 parts of titanium dioxide.

[0020] Under the above conditions, polysuccinate, as a hindered amine light stabilizer, inhibits the migration of sodium ions generated by EVA decomposition, thus enhancing anti-PID performance; isopropanol and terpineol optimize ink viscosity and leveling properties, ensuring uniform coating; flux lowers the melting point through B2O3, inhibits ion migration through Sm2O3, and enhances optical and mechanical properties through Bi2O3 and ZnO, thereby increasing reflectivity and durability; titanium dioxide provides high reflectivity and an all-black appearance, improving power generation efficiency.

[0021] According to some embodiments of the present invention, the solvent includes at least one selected from terpineol, isoamyl alcohol, ethylene glycol monobutyl ether, and n-butanol.

[0022] According to a second aspect of the present invention, a method for preparing the photovoltaic glaze is provided, comprising the following steps:

[0023] S1. Mix the ink oil with the dispersant and solvent to obtain the first mixture;

[0024] S2. After adding pigments and flux to the first mixture, the mixture is dispersed and ball-milled to obtain photovoltaic glaze.

[0025] According to a third aspect of the present invention, a photovoltaic backsheet glass is provided, comprising a backsheet glass and an enamel layer disposed on the surface of the backsheet glass, wherein the enamel layer is formed of the photovoltaic enamel.

[0026] Since the application adopts all the technical solutions of the modified cathode material of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments.

[0027] Unless otherwise specified, the term "about" in this invention actually means that the error is allowed to be within ±2%, for example, about 100 is actually 100 ± 2% × 100.

[0028] Unless otherwise specified, "between" in this invention includes the number itself, for example, "between 2 and 3" includes the endpoint values ​​2 and 3.

[0029] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Detailed Implementation

[0030] The following will describe the concept and technical effects of the present invention clearly and completely with reference to embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are all within the scope of protection of the present invention.

[0031] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] Example 1

[0033] This embodiment prepares a photovoltaic glaze, and the preparation method includes the following steps:

[0034] S1. Mix 1.5 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester with 9.25 parts of isopropanol and 9.25 parts of terpineol by weight to obtain the first mixture (inking oil);

[0035] S1. By weight, 20 parts of ink oil, 65 parts of flux, and 15 parts of titanium dioxide are added to a dispersion tank and dispersed at 1500 rpm for 50 minutes. The mixture is then ball-milled to obtain photovoltaic glaze. The titanium dioxide is rutile titanium dioxide obtained by the chloride process and is inorganically coated with silicon dioxide and aluminum oxide.

[0036] The composition of the flux is shown in Table 1.

[0037] Example 2

[0038] This embodiment prepares a photovoltaic glaze. The difference between this embodiment and Embodiment 1 is that the composition of the flux is different, as shown in Table 1.

[0039] Example 3

[0040] This embodiment prepares a photovoltaic glaze. The difference between this embodiment and Embodiment 1 is that the composition of the flux is different, as shown in Table 1.

[0041] Example 4

[0042] This embodiment prepares a photovoltaic glaze. The difference between this embodiment and Embodiment 1 is that the composition of the flux is different, as shown in Table 1.

[0043] Example 5

[0044] This embodiment prepares a photovoltaic glaze. The difference between this embodiment and Embodiment 1 is that the composition of the flux is different, as shown in Table 1.

[0045] Example 6

[0046] This embodiment prepared a photovoltaic glaze. The difference between this embodiment and Example 4 is that the polysuccinate content is 3wt%.

[0047] S1: By weight, 3 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 8.5 parts of isopropanol, and 8.5 parts of terpineol are mixed to obtain the first mixture (inking oil);

[0048] S2: By weight, 20 parts of ink oil, 65 parts of flux, and 15 parts of titanium dioxide are added to a dispersion tank in sequence and dispersed at a high speed of 1500 rpm for 50 minutes. The photovoltaic glaze is obtained by ball milling. The titanium dioxide is rutile titanium dioxide obtained by the chloride process and is inorganically coated with silicon dioxide and aluminum oxide.

[0049] Example 7

[0050] This embodiment prepared a photovoltaic glaze. The difference between this embodiment and Example 4 is that the polysuccinate content is 4.5 wt%.

[0051] S1: By weight, 4.5 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 7.75 parts of isopropanol, and 7.75 parts of terpineol are mixed to obtain the first mixture (inking oil).

[0052] S2: By weight, 20 parts of ink oil, 65 parts of flux, and 15 parts of titanium dioxide are added to a dispersion tank in sequence and dispersed at a high speed of 1500 rpm for 50 minutes. The photovoltaic glaze is obtained by ball milling. The titanium dioxide is rutile titanium dioxide obtained by the chloride process and is inorganically coated with silicon dioxide and aluminum oxide.

[0053] Example 8

[0054] This embodiment prepared a photovoltaic glaze. The difference between this embodiment and Example 4 is that the polysuccinate content is 6 wt%.

[0055] S1: By weight, 6 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 7 parts of isopropanol, and 7 parts of terpineol are mixed to obtain the first mixture (inking oil).

[0056] S2: By weight, 20 parts of ink oil, 65 parts of flux, and 15 parts of titanium dioxide are added to a dispersion tank in sequence and dispersed at a high speed of 1500 rpm for 50 minutes. The photovoltaic glaze is obtained by ball milling. The titanium dioxide is rutile titanium dioxide obtained by the chloride process and is inorganically coated with silicon dioxide and aluminum oxide.

[0057] Example 9

[0058] This embodiment prepared a photovoltaic glaze. The difference between this embodiment and Example 4 is that the polysuccinate content is 7.5 wt%.

[0059] S1: By weight, 7.5 parts of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester, 6.25 parts of isopropanol, and 6.25 parts of terpineol are mixed to obtain the first mixture (inking oil);

[0060] S2: By weight, 20 parts of ink oil, 65 parts of flux, and 15 parts of titanium dioxide are added to a dispersion tank in sequence and dispersed at a high speed of 1500 rpm for 50 minutes. The photovoltaic glaze is obtained by ball milling. The titanium dioxide is rutile titanium dioxide obtained by the chloride process and is inorganically coated with silicon dioxide and aluminum oxide.

[0061] The details are shown in Table 1.

[0062] Table 1. Flux Components in the Examples

[0063]

[0064] Comparative Examples 1-4

[0065] The difference between the above comparative examples and Example 1 is that the poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol) ester in Example 1 was replaced with other resins, while the other conditions were the same, as shown in Table 5.

[0066] Test Example 1:

[0067] The specific performance analysis is as follows, based on the control of the contents of B2O3 and Sm2O3:

[0068] 1) Adhesion: The magnitude of adhesion is an indicator used to measure the bonding strength between the coating and the substrate. The adhesion of the coating can be measured using the cross-cut adhesion test. First, small grids of a certain size are cut into the coating. The grids should be of uniform size and cut through the surface coating. Then, 3M tape is used for adhesion. Finally, the tape is quickly peeled off from one end, and the extent of coating peeling off the substrate is observed. The strength of the adhesion is qualitatively analyzed based on the peeling situation, as shown in Table 2.

[0069] The rating criteria are shown in the table below. An adhesion of not less than 4B is considered acceptable.

[0070] Table 2. Coating Adhesion Rating

[0071]

[0072] 2) Acid and alkali resistance test of enamel-coated glass: The chemical stability of the enamel layer was tested according to national standards JCT2167-2013 and JCT1006-2006. The ink was sintered onto a glass substrate to obtain a glass enamel layer. Then, at room temperature, a 3.5% hydrochloric acid solution or a 10% citric acid solution was dropped onto the enamel surface of the sample, wetting a diameter of approximately 25 mm. After 15 minutes, the sample was rinsed with water and dried, and then the glass enamel surface was observed. For alkali resistance testing, a 10% sodium hydroxide solution was dropped onto the enamel surface of the sample at room temperature, wetting a diameter of approximately 25 mm. After 30 minutes, the sample was rinsed with water and dried, and then the glass enamel surface was observed. The acid and alkali resistance of the ink was rated according to the changes in the sample, as shown in Table 3.

[0073] Table 3. Acid and Alkali Resistance Rating of Inks

[0074]

[0075]

[0076] 3) Hardness: Test the hardness of a 5H Chinese pencil on the glazed glass surface. After erasing the scratches with a soft eraser, visually inspect the surface for scratches after the coating test.

[0077] 4) High temperature and high humidity resistance: Five different types of black glazed glass were placed in a constant temperature and humidity chamber at 65℃ and 95% for 168 hours. After being taken out and cooled at room temperature for 30 minutes, the reflectance of the five different types of black glazed glass was measured.

[0078] 5) Resistance to thermal cycling: Five different types of black glazed glass were placed in a temperature range of 2 hours (set to (80±1)℃ for 3 hours, then set to (-40±1)℃ for another 3 hours). A total of 20 cycles were tested, and the reflectivity of the five different types of black glazed glass was measured.

[0079] 6) UV resistance: Five different types of black glazed glass were irradiated with 8 UV150W lamps at 60℃ for 5 hours and then cooled at 50℃ for 5 hours as one cycle. A total of 10 cycles were conducted. The reflectance of the five different types of black glazed glass was measured and any significant changes in reflectance were observed.

[0080] 7) Water resistance: Five different types of black glazed glass were placed in 80℃ hot water and soaked for 1h, 3h, 5h, 7h and 10h. After being taken out, they were rinsed with distilled water and dried at 100℃. The reflectivity of the five different types of black glazed glass was then tested to study the stability of black glazed glass in hot water.

[0081] 8) Friction resistance test: The friction positions of five different types of black glazed glass were marked and the relevant transmittance was recorded. Then, the five different types of black glazed glass were placed in a friction tester for 500 friction cycles. The transmittance of the friction points was measured again with an Aobotai measuring instrument to observe whether there was any significant change in transmittance, as shown in Table 4.

[0082] Table 4. Performance Tests of Examples

[0083]

[0084]

[0085] The specific test results in the table show that SO04 (i.e., when the contents of B2O3 and Sm2O3 are 17.6% and 1.2% respectively) has excellent performance.

[0086] (2) The particle size of the ink solids is related to the final roll coating effect. If the particle size is too large, the solid particles in the ink will agglomerate, which is not conducive to uniform dispersion. Conversely, the larger particle surface area will increase the difficulty of spreading. At the same time, it is necessary to ensure the reasonable viscosity of the ink. If the viscosity is too high, clogging problems will occur. Conversely, if the viscosity is too low, the ink flow will be increased, which will eventually enlarge the image dots and is not conducive to achieving the goal of fine roll coating printing. Surface tension is directly related to the leveling of ink bubbles. If the surface tension is too high, it will cause problems such as bubbling and pinholes. If the surface tension is too low, problems such as uneven coating and poor transfer will easily occur. Controlling the surface tension within a reasonable range will ensure the smoothness and flatness of the formed coating.

[0087] Black enamel glass has a long service life. However, if the acid and alkali resistance of the glass coating is reduced through treatment, problems such as fading and discoloration will occur during subsequent use, and the product may even become unusable. Therefore, it is necessary to strictly control the acid and alkali resistance of the glass ink. The black enamel glass described in this patent has the following advantages in ink preparation: by utilizing a solvent-based transparent resin coating, it is beneficial to the adhesion of the photocured transparent resin coating to the glass substrate. The ink preparation method includes:

[0088] 1) Preparation of ink oil: Add solvent and dispersant to a beaker at a ratio of 9:1, mix evenly with a mechanical stirrer, then add resin and continue stirring until the resin is completely dissolved to obtain the ink oil in the glaze raw material.

[0089] 2) Glaze preparation: Selected ink oil, inorganic pigments and additives are mixed in proportions of (12wt%-20wt%), (5wt%-15wt%), and (45wt%-65wt%), and then placed in a reaction vessel and ball-milled at a speed of 400r / min for 6 hours. Samples are taken every 2 hours for a total of 3 times to obtain black glaze glass glaze.

[0090] 3) Preparation method of glazed glass: The glaze is evenly coated on the surface of the original glass using a roller coater. The glazed original glass is then placed in a 180℃ drying oven for 5 minutes to cure. After the solvent has completely evaporated, it is placed in a muffle furnace at 850℃ for 5 minutes to temper, thus obtaining the black glazed glass sample.

[0091] Test Example 2

[0092] To verify the impact of black glaze glass on PID performance, the prepared black glaze glass needs to be assembled into photovoltaic modules by photovoltaic module manufacturers. The working environment of photovoltaic modules under long-term high temperature, high humidity and high voltage conditions is simulated under high temperature (between 60℃ and 85℃), high humidity (85% to 95% humidity) and high voltage (several hundred volts to thousands of volts, usually negative voltage) to evaluate the photovoltaic modules' tolerance to PID effect, thereby ensuring their long-term stability under different environments.

[0093] The type of resin in the ink affects the quality of the ink coating, which in turn has a significant impact on the power generation efficiency and impact resistance of photovoltaic modules. Therefore, it is necessary to select appropriate types of ink resins. While keeping the contents of B2O3 and Sm2O3 constant at 17.6% and 1.2% respectively, the effects of five different resins on the power generation efficiency, impact resistance, and PID resistance of photovoltaic modules were investigated, as shown in Table 5.

[0094] Table 5. Effect of black enamel glass on PID performance

[0095]

[0096] The specific test results in the table show that poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester has the greatest impact on the power generation efficiency, shock resistance, and PID resistance of photovoltaic modules. The next step is to find a suitable poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester content. Therefore, five formulations with different contents of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester were designed to explore their effects on the power generation efficiency, shock resistance, and PID resistance of photovoltaic modules. (Hindered amine light stabilizers are mainly used in photovoltaic products to improve product stability, while the purpose of adding poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester in this invention is mainly to improve the PID resistance and power generation of photovoltaic glass). See Table 6.

[0097] Table 6. Performance tests of polysuccinic acid (4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) esters with different contents

[0098]

[0099] The specific test results in the table show that when the content of poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester is 6 wt%, its power generation efficiency, shock resistance, and anti-PID performance are optimal. In summary, when the contents of B2O3 and Sm2O3 are 17.6% and 1.2% respectively, and the ink oil uses poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol) ester as the synthetic raw material, a content of 6 wt% can achieve excellent power generation efficiency and stability for the module.

[0100] The embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A photovoltaic glaze, characterized in that, The preparation raw materials of the ink oil include: ink oil and fluxing agent; The preparation raw materials of the ink oil include: solvent, poly(4-hydroxy-2,2,6,6-tetramethyl-1-piperidinethanol) succinate and dispersant; The preparation raw materials of the fluxing agent include: SiO2, Na2O, B2O3, Sm2O3, Bi2O3 and ZnO.

2. The photovoltaic glaze of claim 1, wherein, The preparation raw materials of the fluxing agent include: 36-59 parts of SiO2, 8-14 parts of Na2O, 3-20 parts of B2O3, 0.3-1.5 parts of Sm2O3, 1-3 parts of Bi2O3 and 5-10 parts of ZnO.

3. The photovoltaic glaze of claim 1, wherein, The solvent includes at least one of terpineol, isoamyl alcohol, ethylene glycol monobutyl ether and n-butanol.

4. The photovoltaic glaze of claim 1, wherein, The dispersant includes at least one of isopropyl alcohol, polyethylene glycol and triethanolamine.

5. The photovoltaic glaze of claim 1, wherein, The preparation raw materials of the photovoltaic glaze further include: pigment; The pigment includes at least one of titanium white, copper and chromium.

6. A method for the production of a photovoltaic glaze according to any one of claims 1 to 5, characterized in that, The method includes the following steps: S1, mixing the ink oil with the dispersant and the solvent to obtain a first mixture; S2, adding the pigment and the fluxing agent to the first mixture and then dispersing and ball milling to obtain the photovoltaic glaze.

7. A photovoltaic backsheet glass characterized by, The photovoltaic backplane glass includes a backplane glass and a glaze layer arranged on the surface of the backplane glass, and the forming material of the glaze layer includes the photovoltaic glaze according to any one of claims 1-5.

8. The photovoltaic backsheet glass according to claim 7, wherein, The preparation method of the photovoltaic backplane glass includes: arranging the photovoltaic glaze on the surface of the backplane glass, and then solidifying and sintering to obtain the photovoltaic backplane glass.

9. The photovoltaic backsheet glass according to claim 8, wherein, The solidification temperature is 180-250℃, and the solidification time is 2-5 min.

10. A dual glass photovoltaic module characterized by, The photovoltaic backplane glass includes the photovoltaic backplane glass according to claims 7-9. The photovoltaic backplane glass includes the photovoltaic backplane glass according to claims 7-9.

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