Light conversion agent for photovoltaic glass and preparation method thereof

Abstract

The invention relates to the technical field of light conversion agents, in particular to a light conversion agent for photovoltaic glass and a preparation method of the light conversion agent. The light conversion agent for the photovoltaic glass is prepared from the following components in percentage by weight in the photovoltaic glass: 30 to 0.25 percent by weight of Nd2O3, 0.01 to 0.22 percent by weight of CeO2, 30 to 0.015 percent by weight of Er2O3, 0.1 to 0.35 percent by weight of Na2SO4, 0.6 to 3.5 percent by weight of NaNO3, less than 0.01 percent by weight of NaCl and less than 0.006 percent by weight of Fe2O3. According to the invention, the technical problem that the service life of a photovoltaic cell assembly is affected by reduction of the generating capacity of a photovoltaic power station and aging of an EVA packaging material due to power attenuation of a photovoltaic cell caused by reduction of ultraviolet radiation while ultraviolet rays in sunlight penetrate through photovoltaic glass is solved. The light conversion agent for the photovoltaic glass provided by the invention can replace traditional clarifying agents such as antimony oxide and the like, and has the same beneficial effects as an antimony-containing clarifying agent for the photovoltaic glass.

Description

Technical field

[0001] The present invention relates to the technical field of light conversion agents, and in particular to a light conversion agent for photovoltaic glass and a preparation method thereof. [Background Technology]

[0002] Under the global trend of low carbonization and green energy, the photovoltaic industry has developed rapidly, and the large-scale construction of photovoltaic power stations has also put forward higher requirements on the technical performance of photovoltaic cell components.

[0003] The visible light in sunlight can make photovoltaic cell modules produce photovoltaic effect. Some of the invisible ultraviolet light and infrared light participate in the photovoltaic effect, and some will have side effects on the battery cells and EVA film. Under the induction of sunlight ultraviolet light, the photoelectric conversion rate of photovoltaic cell modules decays, which in turn leads to a reduction in the power generation of photovoltaic power stations, aging of EVA packaging materials, and shortening the service life of photovoltaic cell modules.

[0004] In view of this, the present invention provides a light conversion agent for photovoltaic glass and a preparation method thereof; the light conversion agent for photovoltaic glass is added to photovoltaic glass to form a new photovoltaic glass component, which can absorb ultraviolet radiation on photovoltaic cell components, thereby reducing the attenuation of the photoelectric conversion rate of the photovoltaic cell components and extending the service life of the photovoltaic cell components. [Summary of the invention]

[0005] In order to solve the technical problem that ultraviolet rays in sunlight pass through photovoltaic glass while reducing the power attenuation of photovoltaic cells caused by ultraviolet radiation, resulting in reduced power generation of photovoltaic power stations and aging of EVA packaging materials, which in turn affects the service life of photovoltaic cell components, the present invention provides a light conversion agent for photovoltaic glass and a preparation method thereof.

[0006] The solution to the technical problem of the present invention is to provide a light conversion agent for photovoltaic glass. The light conversion agent for photovoltaic glass has the following components in photovoltaic glass according to weight percentage:

[0007] Nd2O30wt.%~0.25wt.%, CeO20.01wt.%~0.22wt.%, Er2O30wt.%~0.015wt.%, Na2SO40.1 wt.%~0.35wt.%, NaNO30.6wt.%~3.5wt.%, NaCl<0.01wt.% and Fe2O3<0.006wt.%.

[0008] Preferably, the light conversion agent for photovoltaic glass is composed of the following components in the photovoltaic glass in terms of weight percentage:

[0009] Nd2O3 accounts for 0.01wt.%, CeO2 accounts for 0.035wt.%, Er2O3 accounts for 0.01wt.%, Na2SO4 accounts for 0.32wt.%, NaNO3 accounts for 3.5wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0010] Preferably, the light conversion agent for photovoltaic glass is composed of the following components in the photovoltaic glass in terms of weight percentage:

[0011] Nd2O3 accounts for 0.008wt.%, CeO2 accounts for 0.08wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 3.0wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0012] Preferably, the light conversion agent for photovoltaic glass is composed of the following components in the photovoltaic glass in terms of weight percentage:

[0013] CeO2 accounts for 0.02wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 0.6wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0014] The present invention also provides a method for preparing a light conversion agent for photovoltaic glass, which is used to prepare the light conversion agent for photovoltaic glass. The preparation method comprises the following steps:

[0015] Providing raw materials to be processed, wherein the composition and proportion of the raw materials to be processed are as follows in terms of mass percentage: 0.8wt.% to 3.6wt.% of cerium oxide powder, 0wt.% to 0.5wt.% of neodymium oxide powder, 0wt.% to 0.015wt.% of erbium oxide powder, 3.0wt.% to 31.6wt.% of sodium salt, 60.0wt.% to 90.0wt.% of sodium nitrate, less than 1.1wt.% of sodium chloride, and less than 0.006wt.% of iron oxide;

[0016] The raw materials to be processed are stirred and mixed to obtain the light conversion agent for photovoltaic glass.

[0017] Preferably, the time for stirring and mixing the raw materials to be processed is 10 minutes to 12 minutes.

[0018] Preferably, the proportion of the raw materials to be processed in terms of mass percentage is as follows:

[0019] Cerium oxide powder accounts for 0.87wt.%, neodymium oxide powder accounts for 0.12wt.%, erbium oxide powder accounts for 0.12wt.%, thenardite accounts for 7.97wt.%, sodium nitrate accounts for 89.80wt.%; and sodium chloride is less than 0.25wt.%, and iron oxide is less than 0.006wt.%.

[0020] Preferably, the proportion of the raw materials to be processed in terms of mass percentage is as follows:

[0021] Cerium oxide powder accounts for 2.36wt.%, neodymium oxide powder accounts for 0.15wt.%, sodium sulfate accounts for 8.85wt.%, sodium nitrate accounts for 88.50wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

[0022] Preferably, the proportion of the raw materials to be processed in terms of mass percentage is as follows:

[0023] Cerium oxide powder accounts for 2.15wt.%, Glauber's salt accounts for 32.26wt.%, and sodium nitrate accounts for 65.46wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

[0024] Compared with the prior art, the light conversion agent for photovoltaic glass and the preparation method thereof provided by the present invention have the following advantages:

[0025] 1. An embodiment of the present invention provides a light-converting agent for photovoltaic glass. The light-converting agent for photovoltaic glass comprises the following components in the photovoltaic glass in accordance with weight percentage: Nd2O3 0 wt.% to 0.25 wt.%, CeO2 0.01 wt.% to 0.22 wt.%, Er2O3 0 wt.% to 0.015 wt.%, Na2SO4 0.1 wt.% to 0.35 wt.%, NaNO3 0.6 wt.% to 3.5 wt.%, NaCl < 0.01 wt.% and Fe2O3 < 0.006 wt.%.

[0026] It can be understood that by adding the light-converting agent for photovoltaic glass of the embodiment of the present invention to the photovoltaic glass to form a new photovoltaic glass component, part of the ultraviolet rays passing through the photovoltaic glass can be converted into visible light to absorb the radiation of ultraviolet rays to the photovoltaic cell assembly. At the same time, it can also reduce the power attenuation of the photovoltaic cell caused by ultraviolet radiation and extend the service life of the photovoltaic cell assembly.

[0027] It should be noted that after adding the light conversion agent for photovoltaic glass to the photovoltaic glass, the whiteness of the photovoltaic glass can be improved, the transmittance of visible light can be higher, the absorption and scattering of light on the surface of the photovoltaic glass can be reduced, and the chemical stability of the photovoltaic glass can be improved, ensuring that the photovoltaic glass will not react with the battery cells and EVA packaging materials during the production process, and solving the problem that the EVA packaging material used in crystalline silicon battery modules is prone to accelerated aging and shortened service life due to long-term exposure to sunlight, so as to avoid affecting the performance of the photovoltaic battery modules.

[0028] 2. An embodiment of the present invention also provides a method for preparing a light conversion agent for photovoltaic glass, which is used to prepare the above-mentioned light conversion agent for photovoltaic glass. The preparation method has the same beneficial effects as the above-mentioned light conversion agent for photovoltaic glass, and will not be described in detail here.

Brief Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a flow chart of steps S1 to S2 in a method for preparing a light conversion agent for photovoltaic glass provided in an embodiment of the present invention. [Specific implementation method]

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] In the embodiments provided herein, it should be understood that "B corresponding to A" means that B is associated with A and B can be determined based on A. However, it should also be understood that determining B based on A does not mean determining B based solely on A; B can also be determined based on A and / or other information.

[0033] It should be understood that references to "one embodiment" or "an embodiment" throughout this specification mean that specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the appearance of "in one embodiment" or "in an embodiment" throughout this specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Those skilled in the art should also be aware that the embodiments described in this specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present invention.

[0034] In various embodiments of the present invention, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0035] The flow charts and block diagrams in the accompanying drawings of the present invention illustrate the possible implementation architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, program segment or a part of code, and the module, program segment or a part of code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementation schemes, the functions marked in the box can also occur in a different order than those marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, which is determined based on the functions involved. It should be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented by a dedicated hardware-based system that performs the specified function or operation, or can be implemented by a combination of dedicated hardware and computer instructions.

[0036] The technical solution of the present invention will be described below.

[0037] An embodiment of the present invention provides a light conversion agent for photovoltaic glass. The light conversion agent for photovoltaic glass comprises the following components in photovoltaic glass according to weight percentage:

[0038] Nd2O30wt.%~0.25wt.%, CeO20.01wt.%~0.22wt.%, Er2O30wt.%~0.015wt.%, Na2SO 40.1wt.%~0.35wt.%, NaNO30.6wt.%~3.5wt.%, NaCl<0.01wt.% and Fe2O3<0.006wt.%.

[0039] It can be understood that the photovoltaic glass light conversion agent of the embodiment of the present invention is added to the photovoltaic glass to form a new photovoltaic glass component. Through this design, part of the ultraviolet light passing through the photovoltaic glass can be converted into visible light to absorb the ultraviolet radiation to the photovoltaic cell assembly. At the same time, it can also reduce the power attenuation of the photovoltaic cell caused by ultraviolet radiation and extend the service life of the photovoltaic cell assembly.

[0040] It should be noted that after adding the light conversion agent for photovoltaic glass to the photovoltaic glass, the whiteness of the photovoltaic glass can be improved, the transmittance of visible light can be higher, the absorption and scattering of light on the surface of the photovoltaic glass can be reduced, and the chemical stability of the photovoltaic glass can be improved, ensuring that the photovoltaic glass will not react with the battery cells and EVA packaging materials during the production process, and solving the problem that the EVA packaging material used in crystalline silicon battery modules is prone to accelerated aging and shortened service life due to long-term exposure to sunlight, so as to avoid affecting the performance of the photovoltaic battery modules.

[0041] Photovoltaic glass primarily includes ultra-clear float glass and ultra-clear rolled glass. These two types of glass differ in their production methods: ultra-clear float glass is produced using a tin bath molding process, while ultra-clear rolled glass is produced using a calendering process. Photovoltaic glass is widely used in thin-film solar cell modules, crystalline silicon solar cell modules, solar smart windows, photovoltaic glass building roofs, and photovoltaic glass curtain walls.

[0042] The whiteness of photovoltaic glass can be measured by its transmittance and reflectance. Transmittance refers to the proportion of light transmitted through the photovoltaic glass, while reflectance refers to the proportion of light reflected by the photovoltaic glass surface. The higher the transmittance, the greater the transparency of the photovoltaic glass, while the lower the reflectance, the higher the purity of the photovoltaic glass.

[0043] Generally speaking, ordinary glass can be protected from ultraviolet and infrared rays by utilizing physical and chemical principles. These two principles can be used alone or in combination to achieve a synergistic effect. The physical principle is to use materials on the glass surface that are difficult for ultraviolet rays to penetrate. These materials have the functions of reflection, scattering or refraction. The chemical principle is to add colorants or materials such as TiO2 (titanium dioxide), ZnO (zinc oxide), CeO2 (cerium oxide), Nd2O3 (neodymium oxide) and Er2O3 (erbium oxide) that can absorb ultraviolet and infrared rays to the composition of ordinary glass. These materials can convert ultraviolet and infrared rays into heat energy and dissipate it into the air. Even if light penetrates the glass, it will not cause any harm.

[0044] From a chemical point of view, the elements that can combine with glass components to absorb ultraviolet rays include TiO2, ZnO, CeO2, Nd2O3, Al2O3 (aluminum oxide), MgO (magnesium oxide), FeO (ferrous oxide), etc. Among them, except Al2O3, MgO, and FeO which are already glass components, TiO2, ZnO, CeO2, Nd2O3, and Er2O3 are more commonly used as special ultraviolet absorbers.

[0045] Due to the disadvantages of TiO2 and ZnO, such as strong photocatalytic performance, high refractive index and poor transmittance to visible light, they are mostly used in fields with low requirements for light transmittance. In contrast, rare earth oxides CeO2, Nd2O3 and Er2O3 have low photocatalytic performance and a visible light refractive index smaller than TiO2 and ZnO, and have strong transmittance to visible light, so they are mostly used in fields with high requirements for light transmittance.

[0046] The anti-ultraviolet ability of CeO2 is related to its particle size. When the particle size of CeO2 is large, it reflects and scatters ultraviolet rays in the long-wave region (400nm to 315nm) and the medium-wave region (315nm to 280nm). As the particle size decreases, light can pass through the surface of CeO2 particles, and the absorption of ultraviolet rays in the medium-wave region is significantly enhanced. Moreover, due to the small particle size and high activity of nano-CeO2 particles, they can both reflect and scatter ultraviolet rays and absorb ultraviolet rays. They have a strong absorption capacity for ultraviolet rays with a wavelength less than 340nm, and the absorption between 340nm and 380nm tends to be stable.

[0047] Nd2O3 has a good absorption capacity for ultraviolet rays and infrared rays. In addition to absorbing ultraviolet rays in the range of 300nm to 400nm and being used as a purple colorant for glass, it can also play a role in fluxing and clarifying the glass during the melting process, thereby improving the thermal properties of the glass and enhancing the stability, heat resistance, corrosion resistance, optical properties, hardness and wear resistance of the glass.

[0048] Er2O3 has the ability to absorb infrared rays, and erbium ions (Er 3+ ) after being excited by light with wavelengths of 980nm and 1480nm, it changes from the ground state to 4 I 15 / 2 Transition to a high energy state 4 I 13 / 2 , when Er in high energy state 3+ When it transitions back to the ground state, it emits light with a wavelength of 1550nm. 3+ When added to glass, it can be made into rare earth glass laser material, can be used to make special luminescent glass and infrared absorbing glass, and is also used for decolorization and coloring of glass.

[0049] CeO2 is often found in glass as Ce 3+ and Ce 4+ There are two valence states, Ce 3+ There is strong absorption at 320nm, Ce 4+ It has strong absorption in the entire ultraviolet region and is mostly Ce in neutral or oxidizing atmosphere. 4+ If the amount of CeO2 added is increased, its oxidizability will be enhanced, and the amount of Ce2O3 (cerium trioxide) generated by CeO2 at high temperature will increase. 3+ It is light yellow, thus making the glass yellow. Nd (neodymium) can be used as a 2+ CeO2 reaction of oxidant to Fe 3+ (yellow) to compensate and reduce the reflection and scattering of visible light, making the glass colorless to ensure the transmittance of visible light.

[0050] It can be seen that adding CeO2, Nd2O3 and Er2O3 to photovoltaic glass can not only absorb ultraviolet rays and infrared rays, but also convert part of ultraviolet rays into visible light, making the photovoltaic glass more transparent, ensuring the visible light transmittance of the photovoltaic glass, and improving the strength and heat resistance of the photovoltaic glass. Therefore, it can be used as an ideal material for absorbing ultraviolet rays and infrared rays; the component composition of the light conversion agent for photovoltaic glass in the embodiment of the present invention contains three rare earth oxides, CeO2, Nd2O3 and Er2O3, which can be used for ultra-white rolled glass in photovoltaic glass, and can also be used for ultra-white float glass.

[0051] In addition, CeO2 and Nd2O3 are also strong oxidants that can decompose at temperatures of 1400°C to form Ce2O3 and release a certain amount of O2. Some of the O2 enters the bubbles in the glass liquid, reducing the gas partial pressure in the bubbles, allowing them to continue absorbing gas, increasing the bubble volume and accelerating their rise, thereby achieving the purpose of clarifying the glass liquid. On the other hand, O2 can also react with the more strongly colored FeO to form the less colored Fe2O3 (iron oxide), which in turn has a decolorizing effect and improves the whiteness of the photovoltaic glass. In this case, O2 acts as a high-temperature clarifier and decolorizer.

[0052] It can be understood that the advantage of adding the light conversion agent for photovoltaic glass of the embodiment of the present invention to the components of photovoltaic glass is that it can replace traditional clarifiers such as antimony oxide without causing pollution to the glass, human body and the environment, effectively improve the melting and clarification effect of the glass liquid, and reduce the manufacturing cost of photovoltaic glass.

[0053] See also Figure 1 The present invention also provides a method for preparing a light conversion agent for photovoltaic glass, which is used to prepare the light conversion agent for photovoltaic glass. The preparation method comprises the following steps:

[0054] S1: Providing raw materials to be processed, wherein the composition and proportion of the raw materials to be processed in terms of mass percentage are as follows: cerium oxide powder 0.8wt.% to 3.6wt.%, neodymium oxide powder 0wt.% to 0.5wt.%, erbium oxide powder 0wt.% to 0.015wt.%, thenardite 3.0wt.% to 31.6wt.%, sodium nitrate 60.0wt.% to 90.0wt.%, sodium chloride <1.1wt.%, and iron oxide <0.006wt.%;

[0055] S2: stirring and mixing the raw materials to be processed to obtain a light conversion agent for photovoltaic glass.

[0056] It can be understood that in the preparation method provided in the embodiment of the present invention, after the raw materials to be processed are stirred and mixed to obtain the light-converting agent for photovoltaic glass, the light-converting agent for photovoltaic glass is added to the photovoltaic glass to form a new photovoltaic glass component; since the photovoltaic glass contains the light-converting agent for photovoltaic glass obtained by the preparation method, the new photovoltaic glass component can convert part of the ultraviolet light passing through the photovoltaic glass into visible light, so as to absorb the radiation of ultraviolet light to the photovoltaic cell assembly, and at the same time can also reduce the power attenuation of the photovoltaic cell caused by ultraviolet radiation, thereby extending the service life of the photovoltaic cell assembly.

[0057] It should be noted that the present invention provides a preparation method to obtain the above-mentioned light conversion agent for photovoltaic glass, and adds it to the components of photovoltaic glass. Therefore, the preparation method provided in the embodiment of the present invention has the same beneficial effects as the light conversion agent for photovoltaic glass provided in the above embodiment.

[0058] Furthermore, the time for stirring and mixing the raw materials to be processed is 10 minutes to 12 minutes.

[0059] Understandably, the time required for mixing varies slightly depending on the ratio of the raw materials to be processed. If the mixing time is too short, the raw materials will not be mixed evenly, which will affect the melting effect of the raw materials. If the mixing time is too long, the power consumption of the mixing equipment will increase and the working time of the workers will be extended.

[0060] In some embodiments, the raw materials that need to be stirred and mixed can be placed on a weighing device for manual weighing to obtain the corresponding proportions of the raw materials to be processed; or an automatic electronic scale with an accuracy of one thousandth can be used to obtain a certain proportion of the raw materials to be processed, so as to reduce the loading process, save the weighing time of the ingredients, save manpower to a certain extent, and reduce the labor intensity of workers.

[0061] In some embodiments, the stirring and mixing equipment used to stir and mix the raw materials to be processed is a QH1000 forced mixer; it can be understood that the stirring and mixing equipment is used in the embodiments of the present invention for forced stirring and mixing of glass compounding materials to obtain a light conversion agent for photovoltaic glass that can solve the technical problems of the present invention. The use of other types of stirring and mixing equipment can also perform the corresponding steps of the preparation method in the embodiments of the present invention. The present invention only lists one embodiment for illustration. Any modifications, equivalent replacements and improvements made within the principles of the present invention should be included in the scope of protection of the present invention.

[0062] The technical solution of the present invention will be further described below with reference to embodiments, but is not limited thereto. Those skilled in the art may make changes in the specific implementation and application scope of the technical solution provided by the present invention. Therefore, the content to be described below should not be understood as limiting the present invention. Any modifications, equivalent substitutions and improvements made within the principles of the present invention should be included in the scope of protection of the present invention.

[0063] Example 1

[0064] The light conversion agent for photovoltaic glass of this embodiment is composed of the following components in the photovoltaic glass according to weight percentage:

[0065] Nd2O3 accounts for 0.01wt.%, CeO2 accounts for 0.035wt.%, Er2O3 accounts for 0.01wt.%, Na2SO4 accounts for 0.32wt.%, NaNO3 accounts for 3.5wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0066] The proportions of the raw materials to be processed in this embodiment are as follows in terms of mass percentage:

[0067] Cerium oxide powder accounts for 0.87wt.%, neodymium oxide powder accounts for 0.12wt.%, erbium oxide powder accounts for 0.12wt.%, thenardite accounts for 7.97wt.%, sodium nitrate accounts for 89.80wt.%; and sodium chloride is less than 0.25wt.%, and iron oxide is less than 0.006wt.%.

[0068] It should be noted that the weighing device used in this embodiment is an automatic electronic scale with an accuracy of one thousandth, and the stirring and mixing equipment is a QH1000 forced mixer; cerium oxide powder, neodymium oxide powder, erbium oxide powder, Glauber's salt and sodium nitrate are respectively weighed by an automatic electronic scale to obtain the above-mentioned proportions of raw materials to be processed, and then these raw materials to be processed are sent to the QH1000 forced mixer for stirring and mixing. After the stirring and mixing is completed, they are sealed in a packaging bag to prepare a light conversion agent for photovoltaic glass.

[0069] In this embodiment, the raw materials to be processed are fed into the QH1000 forced mixer for stirring and mixing for 10 minutes.

[0070] Example 2

[0071] The light conversion agent for photovoltaic glass of this embodiment is composed of the following components in the photovoltaic glass according to weight percentage:

[0072] Nd2O3 accounts for 0.008wt.%, CeO2 accounts for 0.08wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 3.0wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0073] The proportions of the raw materials to be processed in this embodiment are as follows in terms of mass percentage:

[0074] Cerium oxide powder accounts for 2.36wt.%, neodymium oxide powder accounts for 0.15wt.%, sodium sulfate accounts for 8.85wt.%, sodium nitrate accounts for 88.50wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

[0075] It should be noted that the weighing device used in this embodiment is an automatic electronic scale with an accuracy of one thousandth, and the stirring and mixing equipment is a QH1000 forced mixer; cerium oxide powder, neodymium oxide powder, Glauber's salt and sodium nitrate are respectively weighed by an automatic electronic scale to obtain the above-mentioned proportions of raw materials to be processed, and then these raw materials to be processed are sent to the QH1000 forced mixer for stirring and mixing. After the stirring and mixing is completed, they are sealed in a packaging bag to prepare a light conversion agent for photovoltaic glass.

[0076] In this embodiment, the raw materials to be processed are fed into the QH1000 forced mixer for stirring and mixing for 12 minutes.

[0077] Example 3

[0078] The light conversion agent for photovoltaic glass of this embodiment is composed of the following components in the photovoltaic glass according to weight percentage:

[0079] CeO2 accounts for 0.02wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 0.6wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

[0080] The proportions of the raw materials to be processed in this embodiment are as follows in terms of mass percentage:

[0081] Cerium oxide powder accounts for 2.15wt.%, Glauber's salt accounts for 32.26wt.%, and sodium nitrate accounts for 65.46wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

[0082] It should be noted that the weighing device used in this embodiment is an automatic electronic scale with an accuracy of one thousandth, and the stirring and mixing equipment is a QH1000 forced mixer; cerium oxide powder, Glauber's salt and sodium nitrate are respectively weighed by an automatic electronic scale to obtain the above-mentioned proportions of raw materials to be processed, and then these raw materials to be processed are sent to the QH1000 forced mixer for stirring and mixing. After the stirring and mixing is completed, they are sealed in a packaging bag to prepare a light conversion agent for photovoltaic glass.

[0083] In this embodiment, the raw materials to be processed are fed into the QH1000 forced mixer for stirring and mixing for 10 minutes.

[0084] Compared with the prior art, the light conversion agent for photovoltaic glass and the preparation method thereof provided by the present invention have the following advantages:

[0085] 1. An embodiment of the present invention provides a light-converting agent for photovoltaic glass. The light-converting agent for photovoltaic glass has the following components in photovoltaic glass according to weight percentage: Nd2O3 0wt.% to 0.25wt.%, CeO2 0.01wt.% to 0.22wt.%, Er2O3 0wt.% to 0.015wt.%, Na2SO4 0.1wt.% to 0.35wt.%, NaNO3 0.6wt.% to 3.5wt.%, NaCl < 0.01wt.% and Fe2O3 < 0.006wt.%.

[0086] It can be understood that by adding the light-converting agent for photovoltaic glass of the embodiment of the present invention to the photovoltaic glass to form a new photovoltaic glass component, part of the ultraviolet rays passing through the photovoltaic glass can be converted into visible light to absorb the radiation of ultraviolet rays to the photovoltaic cell assembly. At the same time, it can also reduce the power attenuation of the photovoltaic cell caused by ultraviolet radiation and extend the service life of the photovoltaic cell assembly.

[0087] It should be noted that after adding the light conversion agent for photovoltaic glass to the photovoltaic glass, the whiteness of the photovoltaic glass can be improved, the transmittance of visible light can be higher, the absorption and scattering of light on the surface of the photovoltaic glass can be reduced, and the chemical stability of the photovoltaic glass can be improved, ensuring that the photovoltaic glass will not react with the battery cells and EVA packaging materials during the production process, and solving the problem that the EVA packaging material used in crystalline silicon battery modules is prone to accelerated aging and shortened service life due to long-term exposure to sunlight, so as to avoid affecting the performance of the photovoltaic battery modules.

[0088] 2. An embodiment of the present invention also provides a method for preparing a light conversion agent for photovoltaic glass, which is used to prepare the above-mentioned light conversion agent for photovoltaic glass. The preparation method has the same beneficial effects as the above-mentioned light conversion agent for photovoltaic glass, and will not be described in detail here.

[0089] The above is a detailed introduction to a light conversion agent for photovoltaic glass and a preparation method thereof disclosed in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea.

[0090] At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention. Any modifications, equivalent replacements and improvements made within the principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A light conversion agent for photovoltaic glass, characterized in that: The light conversion agent for photovoltaic glass has the following components in terms of weight percentage in photovoltaic glass: Nd2O30wt.%~0.25wt.%, CeO20.01wt.%~0.22wt.%, Er2O30wt.%~0.015wt.%, Na2SO40.1 wt.%~0.35wt.%, NaNO30.6wt.%~3.5wt.%, NaCl<0.01wt.% and Fe2O3<0.006wt.%.

2. The light conversion agent for photovoltaic glass according to claim 1, characterized in that: The light conversion agent for photovoltaic glass has the following components in terms of weight percentage in photovoltaic glass: Nd2O3 accounts for 0.01wt.%, CeO2 accounts for 0.035wt.%, Er2O3 accounts for 0.01wt.%, Na2SO4 accounts for 0.32wt.%, NaNO3 accounts for 3.5wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

3. The light conversion agent for photovoltaic glass according to claim 1, characterized in that: The light conversion agent for photovoltaic glass has the following components in terms of weight percentage in photovoltaic glass: Nd2O3 accounts for 0.008wt.%, CeO2 accounts for 0.08wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 3.0wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

4. The light conversion agent for photovoltaic glass according to claim 1, characterized in that: The light conversion agent for photovoltaic glass has the following components in terms of weight percentage in photovoltaic glass: CeO2 accounts for 0.02wt.%, Na2SO4 accounts for 0.3wt.%, NaNO3 accounts for 0.6wt.%, and NaCl is less than 0.01wt.%, and Fe2O3 is less than 0.006wt.%.

5. A method for preparing a light conversion agent for photovoltaic glass, for preparing the light conversion agent for photovoltaic glass according to any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: Providing raw materials to be processed, wherein the composition and proportion of the raw materials to be processed in terms of mass percentage are as follows: 0.8wt.% to 3.6wt.% of cerium oxide powder, 0wt.% to 0.5wt.% of neodymium oxide powder, 0wt.% to 0.015wt.% of erbium oxide powder, 3.0wt.% to 31.6wt.% of sodium salt, 60.0wt.% to 90.0wt.% of sodium nitrate, <1.1wt.% of sodium chloride and <0.006wt.% of iron oxide; The raw materials to be processed are stirred and mixed to obtain the light conversion agent for photovoltaic glass.

6. The preparation method according to claim 5, characterized in that: The time for stirring and mixing the raw materials to be processed is 10 minutes to 12 minutes.

7. The preparation method according to claim 6, characterized in that: The proportion of the raw materials to be processed by mass percentage is as follows: Cerium oxide powder accounts for 0.87wt.%, neodymium oxide powder accounts for 0.12wt.%, erbium oxide powder accounts for 0.12wt.%, sodium sulfate accounts for 7.97wt.%, sodium nitrate accounts for 89.80wt.%; and sodium chloride is less than 0.25wt.%, and iron oxide is less than 0.006wt.%.

8. The preparation method according to claim 6, characterized in that: The proportion of the raw materials to be processed by mass percentage is as follows: Cerium oxide powder accounts for 2.36wt.%, neodymium oxide powder accounts for 0.15wt.%, sodium sulfate accounts for 8.85wt.%, sodium nitrate accounts for 88.50wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

9. The preparation method according to claim 6, characterized in that: The proportion of the raw materials to be processed by mass percentage is as follows: Cerium oxide powder accounts for 2.15wt.%, Glauber's salt accounts for 32.26wt.%, and sodium nitrate accounts for 65.46wt.%; and sodium chloride is less than 0.10wt.%, and iron oxide is less than 0.006wt.%.

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