Glass, preparation method thereof and photovoltaic module

Abstract

The invention discloses glass, a preparation method thereof and a photovoltaic module. The glass comprises the following components in parts by weight: 70-74 parts of silicon oxide, 5-9 parts of manganese oxide, 1-5 parts of magnesium oxide and 1-5 parts of calcium oxide. The glass provided by the invention contains the coloring particle manganese oxide and the silicon oxide which can be matched with other components magnesium oxide and calcium oxide to form silicate, all the components construct a glass network, and the glass which is high in light transmittance and can meet the photovoltaic level can be obtained under the condition that raw materials containing tellurium components are not added.

Description

Technical Field

[0001] The present application relates to the field of glass, and in particular to glass and a preparation method thereof, and a photovoltaic module. Background Art

[0002] High light transmittance glass is widely used in various fields. For example, in the field of architecture, it allows more light to enter the room and reduce power consumption. In the field of driving, it can improve driving safety. In the field of optics, it can ensure the quality of imaging, improve measurement accuracy and reliability. In the field of photovoltaics, high light transmittance glass can improve the reliability of photovoltaic modules. Traditional glass often contains trace amounts of tellurium to increase the light transmittance of the glass, but metallic tellurium has a certain impact on the environment.

[0003] Traditional tellurium-free glass is mainly prepared by using additives, but the additives have poor stability and will slowly decompose, causing the glass's transmittance and refractive index to decrease, affecting the reliability and service life of the components; after long-term use, the transmittance performance decreases and the conversion efficiency is difficult to reach photovoltaic levels. Summary of the invention

[0004] Based on this, it is necessary to provide a tellurium-free, high-transmittance glass that can meet photovoltaic levels, a preparation method thereof, and a photovoltaic module.

[0005] The present application provides a glass, which comprises, by weight, 70 to 74 parts of silicon oxide, 5 to 9 parts of manganese oxide, 1 to 5 parts of magnesium oxide and 1 to 5 parts of calcium oxide.

[0006] In one embodiment, the mass ratio of calcium oxide to magnesium oxide is (1-3): (2-4).

[0007] In one embodiment, 14 to 17 parts of a eutectic aid are also included.

[0008] In one embodiment, the eutectic aid includes one or both of potassium oxide and sodium oxide.

[0009] In one of the embodiments, it further includes a reinforcement layer disposed on at least one surface of the glass in the thickness direction, wherein the reinforcement layer includes a non-ferrous metal oxide layer.

[0010] In one embodiment, the non-ferrous metal oxide layer includes one or more layers of an aluminum oxide layer, a titanium oxide layer, and a zinc oxide layer.

[0011] In one embodiment, the thickness of the reinforcement layer is 50 μm to 100 μm.

[0012] The present application also provides a method for preparing glass, comprising the following steps:

[0013] Providing a glass substrate, wherein the glass substrate comprises, by weight, 70-73 parts of silicon dioxide, 6-8 parts of manganese dioxide, 1-5 parts of magnesium oxide, and 1-5 parts of calcium oxide;

[0014] heating the glass substrate to prepare a glass melt;

[0015] The glass melt is cooled and annealed to prepare glass.

[0016] In one embodiment, one or both of the following conditions are met:

[0017] (1) heating the glass substrate to 1400° C. to 1500° C.;

[0018] (2) The annealing temperature is 490℃~570℃.

[0019] Furthermore, the present application also provides a photovoltaic assembly, comprising a photovoltaic front glass, a photovoltaic rear glass and a solar cell, wherein the solar cell is arranged between the photovoltaic front glass and the photovoltaic rear glass;

[0020] Wherein, at least one of the photovoltaic front glass and the photovoltaic rear glass comprises the glass as described above or the glass prepared by the preparation method as described above.

[0021] The glass provided in the present application contains colored particles of manganese oxide, which can be combined with other components of magnesium oxide and calcium oxide to form silicate silicon oxide. The above components construct a glass network. Without adding raw materials containing tellurium components, the glass with high light transmittance that can meet photovoltaic grade can be obtained. DETAILED DESCRIPTION

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0023] The term "and / or" used herein includes any one of two or more related listed items, and also includes any and all combinations of the related listed items, wherein the any and all combinations include any combination of two related listed items, any more related listed items, or all related listed items. For example, "A and / or B" includes three parallel solutions: A, B, and "a combination of A and B".

[0024] In this article, unless otherwise specified, "one or more" means any one of the listed items or any combination of the listed items. Similarly, "one or more" and other expressions that mean "one or more" are also understood in the same way unless otherwise specified.

[0025] In this document, "further", "further", "particularly", "for example", "such as", "example", "for example", etc. are used for descriptive purposes, indicating that the previous and subsequent technical solutions are related in terms of the content covered, but should not be understood as limiting the previous technical solution, nor can they be understood as limiting the scope of protection of this document. In this document, unless otherwise specified, A (such as B) means that B is a non-limiting example of A, and it can be understood that A is not limited to B.

[0026] Herein, "optionally", "optional", and "optional" mean optional, that is, any one of the two parallel schemes of "yes" or "no". If multiple "optional" items appear in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" item is independent of each other. In this application, descriptions such as "optionally contain", "optionally include", etc. mean "contain or not contain". "Optional component X" means that component X exists or does not exist, or means that component X is contained or not contained.

[0027] In this document, the terms "first", "second", "third", "fourth", etc. in "the first aspect", "the second aspect", "the third aspect", "the fourth aspect", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumeration and description, and it should be understood that they do not constitute a closed limitation on quantity.

[0028] In this article, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0029] Herein, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​within the numerical interval is considered to be continuous and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when a numerical interval only refers to integers within the numerical interval, including the two endpoint integers of the numerical range, and each integer between the two endpoints, is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical ranges disclosed herein should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows broadly including numerical interval types such as percentage intervals, ratio intervals, and ratio intervals.

[0030] Herein, the term "room temperature" or "normal temperature" generally refers to 4°C to 35°C, for example, 20°C ± 5°C. In some embodiments herein, "room temperature" or "normal temperature" refers to 10°C to 30°C. In some embodiments herein, "room temperature" or "normal temperature" refers to 20°C to 30°C.

[0031] In this article, if there are multiple steps involved in the method flow, unless there is a clear different description in this article, there is no strict order restriction for the execution of these steps, and they can be executed in other orders than described. Moreover, any step can include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn, alternating or simultaneously with other steps or parts of sub-steps or stages of other steps.

[0032] The present application provides a glass, which comprises, by weight, 70 to 74 parts of silicon oxide, 5 to 9 parts of manganese oxide, 1 to 5 parts of magnesium oxide and 1 to 5 parts of calcium oxide.

[0033] The glass provided by the present application contains colored particles of manganese oxide, which can be combined with other components of magnesium oxide and calcium oxide to form silicate silicon oxide. The above components construct a glass network. Without adding raw materials containing tellurium components, the glass with high light transmittance and meeting photovoltaic grade can be obtained. It can be understood that the above manganese oxide is Mn3O4 and the silicon oxide is SiO3.

[0034] In a specific example, the mass ratio of calcium oxide to magnesium oxide in the glass component is (1-3): (2-4). Further, the mass ratio of calcium oxide to magnesium oxide can be, but is not limited to, 1:2, 1:3, 1:4, 2:3, 3:2 or 3:4.

[0035] In a specific example, the glass composition further includes 14 to 17 parts of a eutectic aid. Further, the eutectic aid includes one or both of potassium oxide and sodium oxide.

[0036] In a specific example, the glass comprises, by mass percentage, 70% to 74% silicon oxide, 5% to 9% manganese oxide, 2% to 4% magnesium oxide, 1% to 3% calcium oxide, and 15% to 17% sodium oxide. Further, the mass percentage of magnesium oxide and calcium oxide accounts for 4% to 6% of the glass. The mass percentage of magnesium oxide and calcium oxide in the glass may be, but is not limited to, 4%, 5%, or 6%.

[0037] In a specific example, the glass further comprises a reinforcing layer disposed on at least one side surface along the thickness direction of the glass, and the reinforcing layer comprises a non-ferrous metal oxide layer. Further, the non-ferrous metal oxide layer comprises one or more layers of an aluminum oxide layer, a titanium oxide layer, and a zinc oxide layer. Optionally, the reinforcing layer is an aluminum oxide layer or a titanium oxide layer.

[0038] In a specific example, the thickness of the reinforcing layer is 50 μm to 100 μm. The reinforcing layer can increase the surface hardness of the glass (by more than 50%), improve the wear resistance of the glass (extend the service life by 2-3 times), and improve the impact resistance of the glass (by more than 30%), and also improve the chemical corrosion stability of the glass. Furthermore, the thickness of the reinforcing layer can be, but is not limited to, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm or 100 μm.

[0039] In a specific example, the method for forming the reinforcement layer may be, but is not limited to, using an immersion method or a spraying method to form the material of the reinforcement layer on at least one side of the glass in the thickness direction, and then performing a heat treatment. The temperature of the heat treatment is 700°C to 900°C, and specifically, the temperature of the heat treatment may be, but is not limited to, 700°C, 750°C, 800°C, 850°C or 900°C. The purpose of the heat treatment is to achieve densification of the material of the reinforcement layer on the glass surface.

[0040] It can be understood that the glass has a first surface and a second surface opposite to the first surface in the thickness direction. The reinforcing layer can be formed on the first surface or the second surface of the glass, or formed on the first surface and the second surface at the same time. The reinforcing layer can also cover all surfaces of the glass. Further, the first surface and the second surface of the glass are each independently an air surface or a tin liquid surface.

[0041] The present application also provides a method for preparing glass, comprising the following steps:

[0042] Providing a glass matrix, wherein the glass matrix comprises, by weight, 70-73 parts of silicon dioxide, 6-8 parts of manganese dioxide, 1-5 parts of magnesium oxide, and 1-5 parts of calcium oxide;

[0043] heating the glass matrix to prepare a glass melt;

[0044] The glass melt is cooled and annealed to prepare glass.

[0045] In the preparation method of the provided glass, manganese dioxide and silicon dioxide are used in the glass matrix components, and the reactions are carried out after heating. The specific reaction is as follows: 3MnO2 + 2SiO2 = Mn3O4 + 2SiO3, to generate colored particles Mn3O4 and SiO3, which are combined with other components of magnesium oxide and calcium oxide to form silicates to construct a glass network, and further combined with a eutectic agent. Without adding raw materials containing tellurium components, glass with high light transmittance and meeting photovoltaic levels can be obtained.

[0046] Further, the glass substrate is heated to 1400°C to 1500°C to prepare a glass melt. Further, the glass substrate is heated to 1400°C, 1410°C, 1420°C, 1430°C, 1440°C, 1450°C, 1460°C, 1470°C, 1480°C, 1490°C or 1500°C.

[0047] In a specific example, the annealing temperature is 490°C to 570°C. It can be understood that the annealing temperature can be but is not limited to 490°C, 500°C, 510°C, 520°C, 530°C, 540°C, 550°C, 560°C or 570°C.

[0048] Furthermore, the step of forming is also included after cooling the glass melt and before annealing. Specifically, the glass matrix is ​​heated to a glass melt and then subjected to the steps of cooling, forming and annealing to prepare the glass.

[0049] It can be understood that the above glass is made by the float process. The forming process of float glass production is completed in a tin bath with protective gas (N2 and H2). Molten glass flows continuously from the tank kiln and floats on the surface of the relatively dense tin liquid. Under the action of gravity and surface tension, the glass liquid spreads and flattens on the tin liquid surface to form a flat upper and lower surface, hardens, and is then led to the transition roller table after cooling. The rollers of the roller table rotate, pulling the glass ribbon out of the tin bath and into the annealing kiln. After annealing and cutting, float glass is obtained.

[0050] Furthermore, the present application provides a photovoltaic assembly, comprising a photovoltaic front glass, a photovoltaic rear glass, and a solar cell, wherein the solar cell is disposed between the photovoltaic front glass and the photovoltaic rear glass;

[0051] Wherein, at least one of the photovoltaic front glass and the photovoltaic rear glass includes the glass as described above or the glass prepared by the preparation method as described above.

[0052] It can be understood that the photovoltaic front glass refers to the glass on the light-receiving side, and the photovoltaic rear glass refers to the glass on the backlight side.

[0053] The present application is further described in detail below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present application and are not intended to limit the scope of the present application. The experimental methods for which specific conditions are not specified in the following examples are preferably referred to the guidance given in the present application, and can also be based on the experimental manuals or conventional conditions in the art, can also be based on the conditions recommended by the manufacturer, or refer to experimental methods known in the art.

[0054] In the following specific embodiments, the measured parameters of raw material components may have slight deviations within the range of weighing accuracy unless otherwise specified. For temperature and time parameters, acceptable deviations caused by instrument test accuracy or operation accuracy are allowed. "Normal temperature" refers to 25°C; "normal pressure" refers to 100KPa or 101KPa.

[0055] Example 1

[0056] This embodiment provides a glass, and the preparation method thereof is as follows:

[0057] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 6% MnO2, 2% CaO, 2% MgO and 17% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1400° C. to form a glass melt;

[0058] The glass melt is slowly cooled, formed, and annealed at 570° C. to obtain the glass of this embodiment.

[0059] Example 2

[0060] This embodiment provides a glass, and the preparation method thereof is as follows:

[0061] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 6% MnO2, 3% CaO, 2% MgO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0062] The glass melt is slowly cooled, formed and annealed at 490° C. to prepare glass. An aluminum oxide reinforcement layer with a thickness of 50 μm is prepared on one side of the glass by roller coating to obtain the glass containing the reinforcement layer of this embodiment.

[0063] Example 3

[0064] This embodiment provides a glass, and the preparation method thereof is as follows:

[0065] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 72% SiO2, 8% MnO2, 1% CaO, 4% MgO and 15% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0066] The glass melt is slowly cooled, formed, and annealed at 550° C. to obtain the glass of this embodiment.

[0067] Example 4

[0068] This embodiment provides a glass, and the preparation method thereof is as follows:

[0069] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 72% SiO2, 7% MnO2, 3% CaO, 2% MgO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0070] The glass melt was slowly cooled, formed and annealed at 490° C. to prepare glass. A titanium oxide reinforcement layer with a thickness of 100 μm was prepared on one side of the glass by roller coating to obtain the glass containing the reinforcement layer of this embodiment.

[0071] Example 5

[0072] This embodiment provides a glass, and the preparation method thereof is as follows:

[0073] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 70% SiO2, 8% MnO2, 2% CaO, 3% MgO and 17% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0074] The glass melt was slowly cooled, formed and annealed at 570° C. to prepare glass. An aluminum oxide reinforcement layer with a thickness of 75 μm was prepared on one side of the glass by roller coating to obtain the glass containing the reinforcement layer of this embodiment.

[0075] Comparative Example 1

[0076] This comparative example provides a glass, and the preparation method thereof is as follows:

[0077] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 6% MnO2, 5% CaO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0078] The glass melt was slowly cooled, formed and annealed at 570° C. to obtain the glass of this comparative example.

[0079] Comparative Example 2

[0080] This comparative example provides a glass, and the preparation method thereof is as follows:

[0081] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 6% MnO2, 5% MgO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0082] The glass melt was slowly cooled, formed and annealed at 570° C. to obtain the glass of this comparative example.

[0083] Comparative Example 3

[0084] This comparative example provides a glass, and the preparation method thereof is as follows:

[0085] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 8% MnO2, 5% CaO and 14% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0086] The glass melt was slowly cooled, formed and annealed at 570° C. to obtain the glass of this comparative example.

[0087] Comparative Example 4

[0088] This comparative example provides a glass, and the preparation method thereof is as follows:

[0089] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 73% SiO2, 8% MnO2, 5% MgO and 14% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0090] The glass melt was slowly cooled, formed and annealed at 570° C. to obtain the glass of this comparative example.

[0091] Comparative Example 5

[0092] This comparative example provides a glass, and the preparation method thereof is as follows:

[0093] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 75% SiO2, 4% MnO2, 3% CaO, 2% MgO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0094] The glass melt was slowly cooled, formed and annealed at 490°C to prepare glass. An aluminum oxide reinforcement layer with a thickness of 50 μm was prepared on one side of the glass by roller coating to obtain the glass containing the reinforcement layer of this comparative example.

[0095] Comparative Example 6

[0096] This comparative example provides a glass, and the preparation method thereof is as follows:

[0097] Providing a glass matrix, wherein the glass matrix comprises, by mass percentage, 68% SiO2, 11% MnO2, 3% CaO, 2% MgO and 16% Na2O, wherein the above raw materials are weighed, mixed, melted and other conventional glass preparation processes, and melted at a temperature of 1450° C. to form a glass melt;

[0098] The glass melt was slowly cooled, formed and annealed at 490°C to prepare glass. An aluminum oxide reinforcement layer with a thickness of 50 μm was prepared on one side of the glass by roller coating to obtain the glass containing the reinforcement layer of this comparative example.

[0099] The parameters used in preparing the glasses of the above embodiments and comparative examples are summarized in Table 1 below.

[0100] Table 1

[0101]

[0102] For the light transmittance of the glass of the above-mentioned embodiments and comparative examples, and the glass of the above-mentioned embodiments and comparative examples as photovoltaic front glass, i.e., the glass on the light-receiving surface, if the glass surface contains a coating, the side of the glass containing the coating is the side away from the battery. The light transmittance of the glass of the above-mentioned embodiments and comparative examples is tested by a meteorological levitation instrument, and the conversion efficiency of the solar cell is tested under the conditions of an irradiation intensity of 1000M / cm² and a solar operating temperature of 25℃±2℃. The conversion efficiency of the solar cell = [maximum output power ÷ (sunlight intensity × solar cell light-receiving area)] × 100%, and the glass performance of the above-mentioned embodiments and comparative examples and the conversion efficiency of the solar cell are summarized in the following Table 2.

[0103] Table 2

[0104]

[0105] By comparing the glass performance and solar cell conversion efficiency of the above embodiments and comparative examples, it can be seen that the glass transmittance provided by the present application can reach 93.6% to 94.8%, and the conversion efficiency of the solar cell containing the glass of the present application can reach 19% to 20.7%. Furthermore, the glass of embodiments 2, 4 and 5 containing the reinforcement layer has a significant improvement in both transmittance and conversion efficiency as a solar cell, especially the glass of embodiment 2 has a transmittance of 94.8%, further improving the efficiency of the solar cell to 20.7%.

[0106] In Comparative Examples 1 to 4, the glass transmittance obtained in the end without adding calcium oxide or magnesium oxide to the glass matrix is ​​only 91% to 92.3%, and the conversion efficiency of the solar cell containing the glass of Comparative Examples 1 to 4 is 16% to 17.9%. In Comparative Examples 5 and 6, the raw material input is not within the specified range, which will also lead to a decrease in transmittance and further a significant decrease in the battery conversion rate. It can be seen that through the manganese oxide and silicon oxide system provided by the present application, in combination with other components of magnesium oxide and calcium oxide to form a silicate to construct a glass network, and further with a eutectic additive, without adding raw materials containing tellurium components, a glass with high transmittance and meeting photovoltaic grade can be obtained.

[0107] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0108] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims, and the description may be used to interpret the scope of the claims.

Claims

1. A glass, characterized in that: In parts by weight, the composition includes 70-74 parts of silicon oxide, 5-9 parts of manganese oxide, 1-5 parts of magnesium oxide and 1-5 parts of calcium oxide.

2. The glass according to claim 1, characterized in that The mass ratio of calcium oxide to magnesium oxide is (1~3): (2~4).

3. The glass according to claim 1, characterized in that It also includes 14 to 17 parts of a eutectic aid.

4. The glass according to claim 3, characterized in that The eutectic aid includes one or both of potassium oxide and sodium oxide.

5. The glass according to any one of claims 1 to 4, characterized in that: It also includes a reinforcement layer disposed on at least one side of the glass in the thickness direction, wherein the reinforcement layer includes a non-ferrous metal oxide layer.

6. The glass according to claim 5, characterized in that The non-ferrous metal oxide layer includes one or more layers of an aluminum oxide layer, a titanium oxide layer and a zinc oxide layer.

7. The glass according to claim 5, characterized in that The thickness of the reinforcement layer is 50 μm to 100 μm.

8. A method for preparing glass, characterized in that: The following steps are involved: Providing a glass substrate, wherein the glass substrate comprises, by weight, 70-73 parts of silicon dioxide, 6-8 parts of manganese dioxide, 1-5 parts of magnesium oxide, and 1-5 parts of calcium oxide; heating the glass substrate to prepare a glass melt; The glass melt is cooled and annealed to prepare glass.

9. The preparation method according to claim 8, characterized in that: One or both of the following conditions are met: (1) heating the glass substrate to 1400° C. to 1500° C.; (2) The annealing temperature is 490℃~570℃.

10. A photovoltaic module, characterized in that: It comprises a photovoltaic front glass, a photovoltaic rear glass and a solar cell, wherein the solar cell is arranged between the photovoltaic front glass and the photovoltaic rear glass; Wherein, at least one of the photovoltaic front glass and the photovoltaic rear glass comprises the glass as described in any one of claims 1 to 7 or the glass prepared by the preparation method as described in claim 8 or 9.

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