CN116199429A - Coating material, application of coating material in glass for photovoltaic module and photovoltaic module - Google Patents

Coating material, application of coating material in glass for photovoltaic module and photovoltaic module Download PDF

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Publication number
CN116199429A
CN116199429A CN202211659598.6A CN202211659598A CN116199429A CN 116199429 A CN116199429 A CN 116199429A CN 202211659598 A CN202211659598 A CN 202211659598A CN 116199429 A CN116199429 A CN 116199429A
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weight
parts
coating material
glass
oxide
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施海旋
何志富
吕俊
王静
丁佳伟
赵小强
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Longi Green Energy Technology Co Ltd
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Longi Green Energy Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/34—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions
    • C03C17/3411—Surface treatment of glass, not in the form of fibres or filaments, by coating with at least two coatings having different compositions with at least two coatings of inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/0488—Double glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/042—PV modules or arrays of single PV cells
    • H01L31/048—Encapsulation of modules
    • H01L31/049—Protective back sheets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0547—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the reflecting type, e.g. parabolic mirrors, concentrators using total internal reflection
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/20—Materials for coating a single layer on glass
    • C03C2217/21—Oxides
    • C03C2217/23—Mixtures
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C2217/00—Coatings on glass
    • C03C2217/70—Properties of coatings

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

The present disclosure provides a coating material, its use in glass for photovoltaic modules and a photovoltaic module, the coating material comprising 5 to 15 parts by weight of SiO based on the total mass of the coating material 2 40 to 60 parts by weight of an organic solvent, 25 to 55 parts by weight of purified water and not more than 3 parts by weight of an inorganic light conversion compound; wherein the inorganic light conversion compound is a metal oxide including an oxide of a group IIA metal element and an oxide of a rare earth element. When the coating material is applied to back glass, the strength of the surface of the glass can be effectively improved, and the problem of stress caused by mismatch of thermal expansion between the glass and the reflective glaze is solved; the coating material shouldWhen being used for front glass, can effectively promote visible light wave band, increase the inside ultraviolet resistance ability of subassembly.

Description

Coating material, application of coating material in glass for photovoltaic module and photovoltaic module
Technical Field
The disclosure relates to the technical field of photovoltaics, in particular to a coating material, application of the coating material in glass for a photovoltaic module and the photovoltaic module.
Background
The traditional photovoltaic module is mainly of a single glass structure, and the structure of the traditional photovoltaic module is that: front plate glass (3.2 mm fully tempered+AR film glass), EVA, battery pieces, EVA and a high polymer backboard. Along with the popularization of the double-sided battery, the duty ratio of the double-sided component is gradually increased, and at present, the duty ratio of the double-sided component reaches more than 50%, and correspondingly, the structure of the double-sided component is as follows: front plate glass (2.0 mm semi-tempered and AR film glass), EVA, battery cells, EVA and back plate glass (2.0 mm semi-tempered). Meanwhile, in order to ensure that sunlight is utilized to a greater extent, the back plate glass battery piece gap is subjected to high-reflection glaze plating treatment. Through the process treatment, the assembly efficiency can be improved by about 1%, and the structure is as follows: front plate glass (2.0 mm semi-tempered and AR film glass), EVA, battery cells, EVA, and back plate glass (2.0 mm semi-tempered and reflective frit).
However, in practical applications, the back glass coated with the reflective frit is more prone to breakage than the back glass not coated with the reflective frit. The reason for this is mainly as follows: firstly, the preparation process of the reflective glaze layer mainly comprises screen printing, curing and tempering. The main component of the reflective glaze is TiO 2 In the tempering treatment process, tiO in the glaze layer 2 It enters the glass surface and affects the composition and structure of the glass surface, and defects are generated at the contact place between the glaze layer and the glass. Resulting in the strength of the back glass of the enamel layer being lower than the strength of the back glass without the enamel. And secondly, the thermal expansion coefficient of the reflective glaze layer is different from that of the glass, and the sample is rapidly cooled from about 700 ℃ in the tempering treatment process, so that larger stress exists between the glass and the reflective glaze.
Therefore, how to improve the efficiency of the photovoltaic module and simultaneously ensure the yield of the glass is a problem to be solved in the field.
Disclosure of Invention
The purpose of the present disclosure is to further increase the strength of photovoltaic glass while ensuring the visible light transmittance of photovoltaic glass.
In order to achieve the above object, a first aspect of the present disclosure provides a coating material comprising 5 to 15 parts by weight of SiO based on the total mass of the coating material 2 40 to 60 parts by weight of an organic solvent, 25 to 55 parts by weight of purified water and not more than 3 parts by weight of an inorganic light conversion compound; wherein the inorganic light conversion compound is a metal oxide including an oxide of a group IIA metal element and an oxide of a rare earth element.
Optionally, the coating material comprises 8 to 12 parts by weight of SiO based on the total mass of the coating material 2 1 to 2 parts by weight of an inorganic light conversion compound, 45 to 55 parts by weight of an organic solvent and 35 to 45 parts by weight of purified water.
Optionally, the inorganic light converting compound comprises barium oxide, europium oxide, strontium oxide, and magnesium oxide; the inorganic light converting compound includes not more than 30 parts by weight of barium oxide, not more than 30 parts by weight of europium oxide, not more than 30 parts by weight of strontium oxide and not more than 30 parts by weight of magnesium oxide, based on the total mass of the inorganic light converting compound.
Optionally, the organic solvent is selected from at least one of lower ketones and alcohols.
The second aspect of the disclosure provides a back glass for a photovoltaic module, comprising a back glass substrate, a transparent buffer layer coated on the surface of the back glass substrate, and a reflective glaze layer coated on the surface of the transparent buffer layer; the transparent buffer layer is a coating formed after the coating material is solidified.
Optionally, the transparent buffer layer has a thickness of 2 to 10 μm, preferably 4 to 6 μm; the thickness of the reflective glaze layer is 25-40 mu m, preferably 25-30 mu m.
Optionally, the reflective glaze layer material comprises 20 to 80 parts by weight of oxygen element, 10 to 50 parts by weight of carbon element, not more than 20 parts by weight of fluorine element, 5 to 20 parts by weight of sodium element, not more than 15 parts by weight of aluminum element, 10 to 60 parts by weight of silicon element, not more than 15 parts by weight of potassium element, not more than 15 parts by weight of titanium element, not more than 15 parts by weight of zinc element, not more than 15 parts by weight of group IIA metal element and rare earth element based on the total weight of the reflective glaze layer material; the group IIA metal element comprises a barium element, a strontium element and a magnesium element, and the rare earth element comprises a europium element.
Optionally, the preparation method of the back glass for the photovoltaic module comprises the following steps: plating the coating material on the surface of the back glass substrate and performing first curing treatment to obtain a first plate; plating the reflective glaze layer material on the surface of the first plate and performing second curing treatment to obtain a second plate; and performing first toughening treatment on the second plate.
A third aspect of the present disclosure provides a front glass for a photovoltaic module, including a front glass substrate, an antireflection film layer coated on a surface of the front glass substrate, and a light conversion coating coated on a surface of the antireflection film layer; the light conversion coating is a coating formed after the coating material is cured.
Optionally, the thickness of the antireflection film layer is 105-135 μm, preferably 115-125 μm; the thickness of the light conversion coating is 2 to 10 μm, preferably 4 to 6 μm.
Optionally, the preparation method of the front glass for the photovoltaic module comprises the following steps: plating the anti-reflection film layer material on the surface of the front glass substrate and performing third curing treatment to obtain a third plate; plating the coating material on the surface of the third plate and performing fourth curing treatment to obtain a fourth plate; and performing second tempering treatment on the fourth plate.
A fourth aspect of the present disclosure is a photovoltaic module, the photovoltaic module including a front glass and/or a back glass, the front glass being selected from the front glass for a photovoltaic module described above, and/or the back glass being selected from the back glass for a photovoltaic module described above.
Through the technical scheme, the coating material can effectively improve visible light, reduce ultraviolet light, improve the ageing resistance of the power-enhancing adhesive film of the assembly, improve the strength of the surface of glass and solve the problem of stress caused by mismatch of thermal expansion between glass and reflective glaze when being applied to back glass; when the coating material is applied to front glass, the visible light wave band can be effectively improved, the efficiency of the assembly is improved, and the ultraviolet resistance of the interior of the assembly is improved.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Detailed Description
The following describes specific embodiments of the present disclosure in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
A first aspect of the present disclosure provides a coating material comprising 5 to 15 parts by weight of SiO based on the total mass of the coating material 2 40 to 60 parts by weight of an organic solvent, 25 to 55 parts by weight of purified water and not more than 3 parts by weight of an inorganic light conversion compound; wherein the inorganic light conversion compound is a metal oxide including an oxide of a group IIA metal element and an oxide of a rare earth element.
The inorganic light conversion compound is added into the coating material, and is a metal oxide, so that when the coating material is applied to back glass, visible light can be effectively improved, ultraviolet light can be reduced, ageing resistance of a component power enhancement adhesive film can be improved, strength of the glass surface can be improved, and stress problem caused by thermal expansion mismatch between glass and reflective glaze can be solved; when the coating material is applied to front glass, the visible light wave band can be effectively improved, the efficiency of the assembly is improved, and the ultraviolet resistance of the interior of the assembly is improved.
According to the present disclosure, the coating material may include 8 to 12 parts by weight of SiO based on the total mass of the coating material 2 1 to 2 parts by weight of an inorganic light conversion compound, 45 to 55 parts by weight of an organic solvent and 35 to 45 parts by weight of purified water. The coating materials in the present disclosure also include unavoidable impurities.
According to the present disclosure, the inorganic light converting compound may include barium oxide, europium oxide, strontium oxide, and magnesium oxide; the inorganic light converting compound may include not more than 30 parts by weight of barium oxide, not more than 30 parts by weight of europium oxide, not more than 30 parts by weight of strontium oxide and not more than 30 parts by weight of magnesium oxide, based on the total mass of the inorganic light converting compound. The inorganic light conversion compound disclosed by the disclosure can improve the light transmittance of a visible light wave band.
According to the present disclosure, the organic solvent may be selected from at least one of lower ketones and alcohols.
The second aspect of the disclosure provides a back glass for a photovoltaic module, comprising a back glass substrate, a transparent buffer layer coated on the surface of the back glass substrate, and a reflective glaze layer coated on the surface of the transparent buffer layer; the transparent buffer layer is a coating formed after the coating material is solidified.
The back glass for the photovoltaic module comprises the transparent buffer layer coated on the surface of the back glass substrate, wherein the transparent buffer layer contains an inorganic light conversion material, and after being uniformly distributed, the back glass can convert ultraviolet UVA (315-400 nm) and ultraviolet UVB (280-315 nm) into visible light wave bands (400-760 nm), so that the visible light can be effectively improved, and the ultraviolet light can be reduced. The transparent buffer layer of the present disclosure has a main component of SiO 2 Similar to the main components of glass, the glass components are not changed locally in the tempering process, so that the strength of the glass is improved; the transparent buffer layer comprises SiO as main component 2 The photovoltaic modules are uniformly distributed in a colorless transparent state, and nearby photovoltaic modules are not shielded; because the back glass substrate and the reflective glaze have different thermal expansion coefficients, great stress exists, and the transparent buffer layer is additionally arranged between the back glass substrate and the reflective glaze, so that the stress can be effectively relieved.
According to the present disclosure, the thickness of the transparent buffer layer may be 2 to 10 μm, preferably 4 to 6 μm; the thickness of the reflective glaze layer may be 25 to 40 μm, preferably 25 to 30 μm.
According to the present disclosure, the reflective glaze layer material may include 20 to 80 parts by weight of an oxygen element, 10 to 50 parts by weight of a carbon element, not more than 20 parts by weight of a fluorine element, 5 to 20 parts by weight of a sodium element, not more than 15 parts by weight of an aluminum element, 10 to 60 parts by weight of a silicon element, not more than 15 parts by weight of a potassium element, not more than 15 parts by weight of a titanium element, not more than 15 parts by weight of a zinc element, not more than 15 parts by weight of a group IIA metal element, and a rare earth element, based on the total weight of the reflective glaze layer material; the group IIA metal element may include a barium element, a strontium element, and a magnesium element, and the rare earth element may include a europium element. The reflective glaze layer material disclosed by the disclosure can improve the reflective effect by adding quantitative IIA metal elements and rare earth elements.
According to the disclosure, the preparation method of the back glass for the photovoltaic module can comprise the following steps: plating the coating material on the surface of the back glass substrate and performing first curing treatment to obtain a first plate; plating the reflective glaze layer material on the surface of the first plate and performing second curing treatment to obtain a second plate; and performing first toughening treatment on the second plate.
According to the present disclosure, the plating may be selected from one of screen printing, relief printing, lithographic printing, gravure printing, and flexographic printing; the conditions of the first curing process may include: the temperature is 250-350 ℃ and the time is not more than 20min; the conditions of the second curing process may include: the temperature is 250-350 ℃ and the time is not more than 20min; the conditions of the first tempering treatment may include: the temperature is 650-750 ℃ and the time is not more than 20min.
A third aspect of the present disclosure provides a front glass for a photovoltaic module, including a front glass substrate, an antireflection film layer coated on a surface of the front glass substrate, and a light conversion coating coated on a surface of the antireflection film layer; the light conversion coating is a coating formed after the coating material is cured.
After the anti-reflection coating layer is coated on the front glass substrate, the light conversion coating layer is coated on the surface of the anti-reflection coating layer, so that the visible light wave band can be effectively improved, the efficiency of the assembly is improved, and the ultraviolet resistance of the interior of the assembly is improved
According to the present disclosure, the thickness of the anti-reflective film layer may be 105 to 135 μm, preferably 115 to 125 μm; the thickness of the light conversion coating may be 2 to 10 μm, preferably 4 to 6 μm.
According to the present disclosure, the anti-reflective film layer material may include water, siO 2 The anti-reflection film layer is an independent coating layer outside the glass original sheet based on the total mass of the anti-reflection film layer material.
According to the disclosure, the preparation method of the front glass for the photovoltaic module can comprise the following steps: plating the anti-reflection film layer material on the surface of the front glass substrate and performing third curing treatment to obtain a third plate; plating the coating material on the surface of the third plate and performing fourth curing treatment to obtain a fourth plate; and performing second tempering treatment on the fourth plate.
According to the present disclosure, the plating may be selected from one of magnetron sputtering, roll coating, nano plating, and vacuum evaporation plating; the conditions of the third curing process may include: the temperature is 250-350 ℃ and the time is not more than 20min; the conditions of the fourth curing process may include: the temperature is 250-350 ℃ and the time is not more than 20min; the conditions of the second tempering treatment may include: the temperature is 650-750 ℃ and the time is not more than 20min.
A fourth aspect of the present disclosure is a photovoltaic module, the photovoltaic module including a front glass and a back glass, the front glass being selected from the front glass for the photovoltaic module and/or the back glass being selected from the back glass for the photovoltaic module.
The present disclosure is further illustrated in detail by the following examples. The starting materials used in the examples are all available commercially.
Preparation example 1
In this preparation example, the coating material comprises 5 parts by weight of SiO based on the total mass of the coating material 2 1 part by weight of an inorganic light conversion compound, 40 parts by weight of an organic solvent and 54 parts by weight of purified water; wherein the inorganic light conversion compound comprises 25 parts by weight of barium oxide, 25 parts by weight of europium oxide, 25 parts by weight of strontium oxide and 25 parts by weight of magnesium oxide; the organic solvent is ethanol. The coating material prepared in this preparation example was designated as material A1.
Preparation example 2
This preparation exampleWherein the coating material comprises 10 parts by weight of SiO based on the total mass of the coating material 2 2 parts by weight of an inorganic light conversion compound, 50 parts by weight of an organic solvent and 38 parts by weight of purified water; wherein the inorganic light conversion compound comprises 25 parts by weight of barium oxide, 25 parts by weight of europium oxide, 25 parts by weight of strontium oxide and 25 parts by weight of magnesium oxide; the organic solvent is low-carbon ketone or ethanol. The coating material prepared in this preparation example was designated as material A2.
Preparation example 3
In this preparation example, the coating material comprises 15 parts by weight of SiO based on the total mass of the coating material 2 3 parts by weight of an inorganic light conversion compound, 60 parts by weight of an organic solvent and 25 parts by weight of purified water; wherein the inorganic light conversion compound comprises 25 parts by weight of barium oxide, 25 parts by weight of europium oxide, 25 parts by weight of strontium oxide and 25 parts by weight of magnesium oxide; the organic solvent is low-carbon ketone. The coating material prepared in this preparation example was designated as material A3.
Comparative preparation example 1
In this preparation example, the coating material comprises 10 parts by weight of SiO based on the total mass of the coating material 2 40 parts by weight of an organic solvent and 50 parts by weight of purified water; wherein the organic solvent is ethanol. The coating material prepared in this preparation example was designated as material B1.
Comparative preparation example 2
In this preparation example, the coating material comprises 10 parts by weight of SiO based on the total mass of the coating material 2 2 parts by weight of an inorganic light conversion compound and 55 parts by weight of purified water; wherein the inorganic light converting compound comprises 25 parts by weight of barium oxide, 25 parts by weight of europium oxide, 25 parts by weight of strontium oxide and 25 parts by weight of magnesium oxide. The coating material prepared in this preparation example was designated as material B2.
Example 1
Uniformly coating an antireflection film layer material on the surface of a front glass substrate by using a roll coating method, performing curing treatment at about 60-100 ℃, plating a layer of light conversion coating on the surface of the antireflection film layer by using magnetron sputtering, performing simple curing treatment, and finally performing tempering treatment at about 700 ℃. The thickness of the antireflection film layer is 115 μm; the thickness of the light conversion coating was 5 μm.
In this embodiment, the total mass of the materials of the anti-reflection film layer is taken as a reference, and the anti-reflection film layer is an independent coating layer outside the glass original sheet. The material of the light conversion coating is material A1.
Example 2
The preparation method of the front glass of this embodiment is the same as that of embodiment 1, except that the material of the light conversion coating used in this embodiment is material A2.
Example 3
The preparation method of the front glass of this embodiment is the same as that of embodiment 1, except that the material of the light conversion coating used in this embodiment is material A3.
Comparative example 1
The front glass of this comparative example was prepared in the same manner as in example 1, except that the material of the light conversion coating used in this example was material B1.
Comparative example 2
The front glass of this comparative example was prepared in the same manner as in example 1, except that the material of the light conversion coating used in this example was material B2.
Example 4
Plating a transparent buffer layer material on the surface of the back glass substrate through screen printing and curing at 300 ℃ for 10S to obtain a first plate; screen printing and plating a reflective glaze material on the surface of the first plate, and curing at 300 ℃ for 10s to obtain a second plate; and (3) tempering the second plate at the temperature of about 700 ℃ for 105 seconds. The thickness of the transparent buffer layer prepared in this example was 5. Mu.m, and the thickness of the reflective glaze layer was 30. Mu.m.
In this embodiment, the total mass of the reflective glaze layer material is taken as a reference, and the reflective glaze layer material is coated with white glaze. The transparent buffer layer material is material A1.
Example 5
The preparation method of the back glass of this embodiment is the same as that of embodiment 1, except that the transparent buffer layer material used in this embodiment is material A2.
Example 6
The preparation method of the back glass of this embodiment is the same as that of embodiment 1, except that the transparent buffer layer material used in this embodiment is material A3.
Comparative example 3
The back glass of this comparative example was prepared in the same manner as in example 1, except that the transparent buffer layer material used in this example was material B1.
Comparative example 4
The back glass of this comparative example was prepared in the same manner as in example 1, except that the transparent buffer layer material used in this example was material B2.
Test example 1
The front glass prepared in examples 1-3 and comparative examples 1-2 were tested in the visible light range by comparing the transmittance in different ranges, and the test results are shown in Table 1
TABLE 1
Figure BDA0004013150910000101
As can be seen from table 1: the average light transmittance of the front glass prepared in examples 1-3 is significantly improved in the visible light band of 400-760 nm.
Test example 2
The back glass prepared in examples 4 to 6 and comparative examples 3 to 4 were subjected to a visible light wave band test, a glass strength test and a stress test, and specific test methods are a reflectivity test, a four-point bending test and a glass stress tester, and test results are shown in table 2.
TABLE 2
Figure BDA0004013150910000102
Figure BDA0004013150910000111
As can be seen from table 2: the reflectivity, four-point bending strength and stress of the back glass glaze plating layer prepared in the examples 4-6 are all obviously improved.
The preferred embodiments of the present disclosure have been described in detail above, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims (12)

1. A coating material comprising 5 to 15 parts by weight of SiO based on the total mass of the coating material 2 40 to 60 parts by weight of an organic solvent, 25 to 55 parts by weight of purified water and not more than 3 parts by weight of an inorganic light conversion compound;
wherein the inorganic light conversion compound is a metal oxide including an oxide of a group IIA metal element and an oxide of a rare earth element.
2. The coating material according to claim 1, wherein the coating material comprises 8 to 12 parts by weight of SiO based on the total mass of the coating material 2 1 to 2 parts by weight of an inorganic light conversion compound, 45 to 55 parts by weight of an organic solvent and 35 to 45 parts by weight of purified water.
3. The coating material of claim 1, wherein the inorganic light converting compound comprises barium oxide, europium oxide, strontium oxide, and magnesium oxide; the inorganic light converting compound includes not more than 30 parts by weight of barium oxide, not more than 30 parts by weight of europium oxide, not more than 30 parts by weight of strontium oxide and not more than 30 parts by weight of magnesium oxide, based on the total mass of the inorganic light converting compound.
4. The coating material according to claim 1, wherein the organic solvent is selected from at least one of lower ketones and lower alcohols; ethanol is preferred.
5. The back glass for the photovoltaic module is characterized by comprising a back glass substrate, a transparent buffer layer coated on the surface of the back glass substrate and a reflective glaze layer coated on the surface of the transparent buffer layer;
the transparent buffer layer is a coating layer formed by curing the coating material according to any one of claims 1-4.
6. A back glass according to claim 5, wherein the transparent buffer layer has a thickness of 2-10 μm, preferably 4-6 μm; the thickness of the reflective glaze layer is 25-40 mu m, preferably 25-30 mu m.
7. The back glass according to claim 5, wherein the reflective glaze layer material comprises 20 to 80 parts by weight of oxygen element, 10 to 50 parts by weight of carbon element, not more than 20 parts by weight of fluorine element, 5 to 20 parts by weight of sodium element, not more than 15 parts by weight of aluminum element, 10 to 60 parts by weight of silicon element, not more than 15 parts by weight of potassium element, not more than 15 parts by weight of titanium element, not more than 15 parts by weight of zinc element, not more than 15 parts by weight of group IIA metal element and rare earth element, based on the total weight of the reflective glaze layer material; the group IIA metal element comprises a barium element, a strontium element and a magnesium element, and the rare earth element comprises a europium element.
8. The back glass according to claim 5, wherein the method for manufacturing the back glass for a photovoltaic module comprises:
plating the coating material on the surface of the back glass substrate and performing first curing treatment to obtain a first plate; plating the reflective glaze layer material on the surface of the first plate and performing second curing treatment to obtain a second plate; and performing first toughening treatment on the second plate.
9. The front glass for the photovoltaic module is characterized by comprising a front glass substrate, an antireflection film layer coated on the surface of the front glass substrate and a light conversion coating coated on the surface of the antireflection film layer;
the light conversion coating is a coating formed by curing the coating material according to any one of claims 1 to 4.
10. Front glass according to claim 9, characterized in that the thickness of the antireflection film layer is 105-135 μm, preferably 115-125 μm; the thickness of the light conversion coating is 2 to 10 μm, preferably 4 to 6 μm.
11. The front glass according to claim 9, wherein the preparation method of the front glass for a photovoltaic module comprises the following steps:
plating the anti-reflection film layer material on the surface of the front glass substrate and performing third curing treatment to obtain a third plate; plating the coating material on the surface of the third plate and performing fourth curing treatment to obtain a fourth plate; and performing second tempering treatment on the fourth plate.
12. A photovoltaic module, characterized in that the photovoltaic module comprises a front glass and/or a back glass, the front glass is selected from the front glass for the photovoltaic module according to any one of claims 9 to 11, and/or the back glass is selected from the back glass for the photovoltaic module according to any one of claims 5 to 8.
CN202211659598.6A 2022-12-22 2022-12-22 Coating material, application of coating material in glass for photovoltaic module and photovoltaic module Pending CN116199429A (en)

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