Light conversion packaging adhesive film and preparation method and application thereof

Abstract

The invention provides a light conversion packaging adhesive film and a preparation method and application thereof, preparation raw materials of the light conversion packaging adhesive film comprise specific parts of resin, a main cross-linking agent, an auxiliary cross-linking agent and a light conversion agent, and the light conversion agent comprises a combination of at least two of a blue light conversion agent, a red light conversion agent or a green light conversion agent; at least two of the blue light conversion agent, the red light conversion agent and the green light conversion agent are added into the preparation raw materials, so that the obtained light conversion adhesive film is softer in color, different colors can be customized according to requirements, the aesthetic feeling of a photovoltaic module prepared from the light conversion adhesive film is greatly improved, and the application prospect is wide. And the conversion rate of the light conversion packaging adhesive film to each ultraviolet band is effectively improved, so that the power, the reliability and the aging resistance of the photovoltaic module are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesive films, and in particular relates to a light conversion packaging adhesive film and a preparation method and application thereof. Background Art

[0002] The spectrum of sunlight ranges from 300-2400nm, which can generally be divided into ultraviolet light, visible light and infrared light. However, traditional optoelectronic devices can only effectively absorb and convert light in specific bands. For example, the spectral response range of crystalline silicon solar cells is mainly concentrated in the visible light and near-infrared light regions. For ultraviolet light, which accounts for a certain proportion of sunlight energy, its direct utilization efficiency is low. A large amount of ultraviolet light is reflected or transmitted through the device without being fully utilized, resulting in a serious waste of light energy, limiting the further improvement of the overall photoelectric conversion efficiency of solar cells.

[0003] In order to improve the photoelectric conversion efficiency of solar cell modules, existing solar cell modules add a light conversion layer on the surface of the cell material or directly add a light conversion agent to the packaging material, so that the light in the band of incident light with poor response of the solar cell is converted into light in the band of better response, thereby achieving maximum utilization of sunlight without changing the structure of the solar cell itself.

[0004] However, the common photoconversion packaging film with added photoconversion agents can only convert ultraviolet light into blue light. On the one hand, it cannot achieve high-efficiency conversion of various ultraviolet bands in sunlight. On the other hand, because the application site of photovoltaic modules is outdoors, such as roofs, etc., there are certain requirements for the appearance color of photovoltaic modules. The film or photovoltaic module prepared with a single photoconversion agent has a single color and is too bright and colorful, and the market acceptance is not high.

[0005] Therefore, in order to solve the above problems, it is necessary to develop a light conversion packaging film that can more efficiently convert ultraviolet light into visible light and can present different colors. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a light conversion packaging film and a preparation method and application thereof.

[0007] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a light conversion packaging adhesive film, wherein the raw materials for preparing the light conversion packaging adhesive include the following components in parts by weight:

[0009] Resin 96-98 parts;

[0010] Main cross-linking agent 0.4-1 part;

[0011] 0.4-1 part of auxiliary cross-linking agent;

[0012] Photoconverter 0.01-0.2 parts;

[0013] The light conversion agent includes a combination of at least two of a blue light conversion agent, a red light conversion agent, or a green light conversion agent.

[0014] Among them, the weight parts of the resin can be 96 parts, 96.2 parts, 96.4 parts, 96.6 parts, 96.8 parts, 97 parts, 97.2 parts, 97.4 parts, 97.6 parts, 97.8 parts, 98 parts, etc.

[0015] The weight proportion of the main cross-linking agent can be 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc.

[0016] The weight proportion of the auxiliary cross-linking agent can be 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 part, etc.

[0017] The weight proportion of the photoconverter may be 0.01 part, 0.02 part, 0.04 part, 0.06 part, 0.08 part, 0.1 part, 0.12 part, 0.14 part, 0.16 part, 0.18 part, 0.2 part, etc.

[0018] Any other specific point value within the above numerical range can be selected, and will not be described in detail here.

[0019] The light conversion packaging film of the present invention makes the color of the obtained light conversion packaging film softer by compounding light conversion agents of different colors, and can customize different colors according to needs, greatly improving the aesthetics of the photovoltaic module made by using the light conversion agent, and having higher market acceptance. At the same time, the present invention can more effectively convert light to a higher band corresponding to the battery by compounding light conversion agents of different colors, compared with a single light conversion agent, thereby increasing the power gain of the photovoltaic module; the compound use of the light conversion agent can also significantly improve the conversion efficiency of the packaging film to each ultraviolet band, convert all ultraviolet light into visible light, and there is no residual unconverted ultraviolet light, so that the reliability of the photovoltaic module is better.

[0020] Preferably, the resin includes any one of POE resin, EVA resin or POE / EVA co-extruded resin, or a combination of at least two of them.

[0021] Preferably, the primary cross-linking agent is a peroxide cross-linking agent.

[0022] Preferably, the peroxide crosslinking agent includes any one or a combination of at least two of tert-butyl peroxide 2-ethylhexyl carbonate, tert-amyl peroxide 2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane, tert-butyl peroxide-3,5,5-trimethylhexanoate, di(4-methylbenzoyl) peroxide, dibenzoyl peroxide, 1,1-di-tert-butyl peroxycyclohexane, tert-butyl peroxy-2-ethylhexyl carbonate, n-butyl-4,4-di(tert-butyl peroxy) valerate, diisopropylbenzene peroxide, α,α′-bis(tert-butyl peroxy)-1,3-diisopropylbenzene or 1,1-bis(tert-butyl peroxy)-3,3,5-trimethylcyclohexane.

[0023] Preferably, the auxiliary crosslinking agent includes any one of triallyl isocyanurate, trimethallyl isocyanate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, ethoxylated trimethylolpropane triacrylate or propoxylated trimethylolpropane triacrylate, or a combination of at least two thereof.

[0024] Preferably, the light conversion agent includes any one or a combination of at least two of benzotriazole light conversion agents, organic fluorescent pigments, rare earth organic complexes, rare earth inorganic compounds, CdSe quantum dots or perovskite quantum dots;

[0025] Preferably, the blue light conversion agent comprises phthalocyanine blue, 4,7-bis(4-tert-butylphenyl)-2-isobutyl-2H-benzotriazole, Pr 3+ Any one of or a combination of at least two of the following: a type of complex, 1,4-bis-2-(5-benzoxazole)-benzene or 4,8-dimethyl-7-carboxycoumarin.

[0026] Preferably, the blue light conversion agent comprises any one or a combination of at least two of the compounds represented by Formula Ia and Ib, and the structural formula of Formula Ia and Ib is as follows:

[0027]

[0028] in:

[0029] The A 0 Selected from substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C1-C30 heteroalkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, and substituted or unsubstituted amino.

[0030] The A 1is selected from substituted or unsubstituted C1-C30 alkylene, substituted or unsubstituted C2-C30 alkenylene, substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C3-C30 heteroarylene, ketone, ester,

[0031] Ar is selected from substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl; R 1 is selected from H, C1-C30 alkyl, C2-C30 alkenyl, C6-C30 aryl, C3-C30 heteroaryl, C7-C30 aralkyl, C7-C30 alkaryl; R 2 It is selected from substituted or unsubstituted C1-C30 alkylene, substituted or unsubstituted C2-C30 alkenylene, substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C3-C30 heteroarylene, ketone and ester.

[0032] The D 1 and D 2 Each is independently selected from substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl.

[0033] Preferably, the heteroaryl group is selected from benzothiazolyl, benzoxazinyl, quinazolinyl, quinolyl, isoquinolyl, quinoxalinyl, pyridyl, pyrrolyl, oxazolyl, indolyl, pyridazinyl, pyrimidinyl, pyrazinyl, 2-cyanopyridin-5-yl, furanyl, dibenzofuran-4-yl, benzofuranyl, dihydrothienodioxin, benzothienyl, dibenzothienyl.

[0034] Preferably, the substitution refers to substitution by one or more groups individually and independently selected from C1-C6 alkyl, C1-C6 alkenyl, C1-C6 alkynyl, C3-C7 cycloalkyl, geminal cycloalkyl, C1-C6 heteroalkyl, C3-C10 heterocycloalkyl, aryl, aralkyl, heteroaryl, halo, cyano, hydroxy, cyclic imido, amino, C1-C6 alkoxy, aryloxy, mercapto, halo (C1-C6) alkyl, C1-C6 alkylthio, arylthio, mono- and di- (C1-C6) alkylamino, quaternary ammonium salts, amino (C1-C6) alkoxy, hydroxy (C1-C6) alkylamino, amino (C1-C6) alkylthio, nitro, carbamoyl, carboxyl, glycolyl, glycyl, hydrazine, amidino, sulfonamide, thiocarboxyl, N-carbamate, O-carbamate, urea and combinations thereof.

[0035] In the present invention, C1-C30 can be C1, C2, C3, C4, C5, C6, C8, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, etc.

[0036] The C2-C30 can all be C2, C3, C4, C5, C6, C8, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, etc.

[0037] The C6-C30 can all be C6, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, etc.

[0038] The C3-C30 can all be C4, C5, C6, C9, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, etc.

[0039] The C7-C30 can all be C7, C8, C10, C12, C13, C14, C15, C16, C18, C20, C22, C24, C26, C28, C30, etc.

[0040] The C3-C7 can all be C3, C4, C5, C6, or C7.

[0041] The C3-C10 can all be C3, C4, C5, C6, C7, C8, C9, C10.

[0042] The C1-C6 can all be C1, C2, C3, C4, C5, C6.

[0043] The present invention creatively finds that when the compounds represented by Formula Ia and Ib are used as blue light conversion agents, the conversion rate of ultraviolet light can be effectively improved compared with other blue light conversion agents, thereby increasing the power of photovoltaic modules.

[0044] Preferably, the red light conversion agent includes dimethyldiaminoxanthenyl chloride, lissamine rhodamine B, fluorescent red Gg, 4-dicyano-methylene-2-methyl-6-p-dimethylaminophenylvinyl-4H-pyran or Eu 3+ Any one or a combination of at least two of the above-mentioned complexes.

[0045] Preferably, the green light conversion agent includes acridine yellow, fluorescent yellow YG-51, sodium fluorescein or Tb 3+ Any one or a combination of at least two of the above-mentioned complexes.

[0046] Preferably, the raw materials for preparing the light conversion encapsulation film also include 0.05-0.5 parts (for example, 0.05 parts, 0.1 parts, 0.15 parts, 0.2 parts, 0.25 parts, 0.3 parts, 0.35 parts, 0.4 parts, 0.45 parts, 0.5 parts, etc.) of a coupling agent by weight fraction, and any other specific point value within this numerical range can be selected, which will not be repeated here.

[0047] Preferably, the coupling agent includes 3-methacryloxypropylmethyltrimethoxysilane, 3-glycidylpropyltrimethoxysilane, vinyltrimethoxysilane, 3-aminopropyltriethoxysilane, vinyltrimethoxysilane, triisostearoyl isopropyl titanate and isopropyl tris(dioctyl pyrophosphate acyloxy) titanate, isocyanatepropyltrimethoxysilane, isocyanatepropyltriethoxysilane, 1,3.5-tris(trimethoxysilylpropyl)isocyanurate, silane oligomer, 3-(methacryloxy)propyltrimethoxysilane, alkoxysilane or vinyltrimethoxysilane, or any one or a combination of at least two thereof.

[0048] Preferably, the raw materials for preparing the light conversion encapsulation film also include 0.1-1 parts (for example, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, etc.) of light stabilizer in parts by weight, and any other specific point values ​​within this numerical range can be selected, which will not be repeated here.

[0049] Preferably, the light stabilizer includes any one of a light shielding agent light stabilizer, a quencher light stabilizer, a free radical scavenger light stabilizer or a hydroperoxide decomposer light stabilizer, or a combination of at least two of them.

[0050] Preferably, the raw materials for preparing the light conversion packaging film also include 0.1-1 parts (for example, 0.1 parts, 0.2 parts, 0.3 parts, 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, 0.9 parts, 1 parts, etc.) of antioxidants in parts by weight, and any other specific point values ​​within this numerical range can be selected, which will not be repeated here.

[0051] Preferably, the antioxidant includes any one of hindered phenol antioxidants, aromatic amine antioxidants, phosphite antioxidants, thioether antioxidants or metal passivator antioxidants, or a combination of at least two thereof.

[0052] In a second aspect, the present invention provides a method for preparing the light conversion packaging adhesive film as described in the first aspect, the preparation method comprising: mixing raw materials in proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

[0053] In a third aspect, the present invention provides a photovoltaic module, wherein the photovoltaic module comprises the light conversion encapsulation film as described in the first aspect.

[0054] Preferably, the photovoltaic module comprises a front glass plate, a light conversion packaging film, a battery cell, a packaging film and a rear glass plate which are stacked.

[0055] Preferably, the photovoltaic module is a colorless and transparent photovoltaic module.

[0056] It should be noted that the “colorless and transparent photovoltaic module” mentioned in the present invention refers to a photovoltaic module in which all components except the solar cells are colorless and transparent.

[0057] Compared with the prior art, the present invention has the following beneficial effects:

[0058] The raw materials for preparing the light conversion packaging film provided by the present invention include a specific number of resins, a main cross-linking agent, an auxiliary cross-linking agent, a photoinitiator and a photoconverter, and the photoconverter includes a combination of at least two of a blue light conversion agent, a red light conversion agent or a green light conversion agent. The light conversion packaging film involved in the present invention makes the color of the obtained light conversion packaging film softer by compounding light conversion agents of different colors, and can customize different colors according to needs, greatly improving the aesthetics of the photovoltaic modules made therefrom, and the market acceptance is higher. At the same time, the present invention can more effectively convert light to a higher band corresponding to the battery than a single light conversion agent by compounding light conversion agents of different colors, thereby increasing the power gain of the photovoltaic module; the compound use of the light conversion agent can also significantly improve the conversion efficiency of the packaging film to each ultraviolet band, converting all ultraviolet light into visible light, without residual unconverted ultraviolet light, so that the reliability of the photovoltaic module is better. DETAILED DESCRIPTION

[0059] In order to further explain the technical means and effects adopted by the present invention, the technical solution of the present invention is further described below in conjunction with the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments.

[0060] In the following examples, unless otherwise specified, the reagents and consumables used were purchased from conventional reagent manufacturers in the field; unless otherwise specified, the experimental methods and technical means used were conventional methods and means in the field.

[0061] Preparation Example

[0062] In this preparation example, compound 1-11 was synthesized according to the method of patent CN103562323A.

[0063]

[0064]

[0065]

[0066] Test Example 1

[0067] Compounds 1-11 were dissolved in tetrahydrofuran to form solutions, and their fluorescence spectra were tested using a fluorescence spectrometer. It was found that the fluorescence spectra of the above structural compounds were all between 380-500 nm, showing blue fluorescence characteristics.

[0068] Compounds with structures Ia and Ib have a multi-benzene ring structure. When absorbing UV light, the excited state molecules quickly reach the lowest vibration energy level of the first excited singlet state through internal conversion and vibration relaxation processes, and emit fluorescence after consuming part of the energy, that is, Stokes shift occurs, and the fluorescence emission wavelength is greater than the excitation light wavelength.

[0069] Example 1

[0070] This embodiment provides a light conversion packaging film, and the raw materials for preparing the film include the following components in parts by weight:

[0071]

[0072] Among them, EVA resin was purchased from Hanwha Total Petrochemical, model E282PV; the blue light conversion agent was compound 1, the red light conversion agent was dimethyldiaminoxanthenyl chloride, and the green light conversion agent was acridinium yellow.

[0073] The method for preparing the light conversion packaging adhesive film provided in this embodiment comprises: mixing the above raw materials according to a certain proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

[0074] Example 2

[0075] This embodiment provides a light conversion packaging film, and the raw materials for preparing the film include the following components in parts by weight:

[0076]

[0077] Among them, the EVA resin was purchased from Hanwha Total Petrochemical, model E282PV; the blue light conversion agent was compound 1, and the red light conversion agent was dimethyldiaminoxanthenyl chloride.

[0078] The method for preparing the light conversion packaging adhesive film provided in this embodiment comprises: mixing the above raw materials according to a certain proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

[0079] Example 3

[0080] This embodiment provides a light conversion packaging film, and the raw materials for preparing the film include the following components in parts by weight:

[0081] A light conversion packaging film, the raw materials for its preparation include the following components in parts by weight:

[0082]

[0083] Among them, the EVA resin was purchased from Hanwha Total Petrochemical, model E282PV; the red light conversion agent was dimethyldiaminoxanthenyl chloride, and the green light conversion agent was acridinium yellow.

[0084] The method for preparing the light conversion packaging adhesive film provided in this embodiment comprises: mixing the above raw materials according to a certain proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

[0085] Example 4

[0086] This embodiment provides a light conversion packaging film, and the raw materials for preparing the film include the following components in parts by weight:

[0087]

[0088] Among them, the EVA resin was purchased from Hanwha Total Petrochemical, model E282PV; the blue light conversion agent was compound 1, and the green light conversion agent was acridinium yellow.

[0089] The method for preparing the light conversion packaging adhesive film provided in this embodiment comprises: mixing the above raw materials according to a certain proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

[0090] Example 5

[0091] This embodiment provides a light conversion packaging film, which differs from Example 1 only in that the EVA resin (E282PV) is replaced with POE resin (Engage 8669), and the other components, amounts and preparation methods are the same as those in Example 1.

[0092] Embodiment 6-15

[0093] This embodiment provides ten light conversion packaging adhesive films, which differ from Embodiment 1 only in that the blue light conversion agents are replaced by compounds 2-11 in equal mass, and the other components, amounts and preparation methods are the same as those in Embodiment 1.

[0094] Example 16

[0095] This embodiment provides a light conversion packaging film, which differs from Example 1 only in that the blue light conversion agent is replaced with 1,4-bis-2-(5-benzoxazole)-benzene, and other components, amounts and preparation methods are the same as those in Example 1.

[0096] Embodiment 17

[0097] This embodiment provides a light conversion packaging adhesive film, which is different from the first embodiment only in that the blue light conversion agent is replaced by phthalocyanine blue, and the other components, dosage and preparation method are the same as those in the first embodiment.

[0098] Embodiment 18

[0099] This embodiment provides a light conversion packaging film, which is different from Example 1 only in that the blue light conversion agent is replaced by 4,8-dimethyl-7-carboxycoumarin, and other components, dosages and preparation methods are the same as those in Example 1.

[0100] Embodiment 19

[0101] This embodiment provides a light conversion packaging adhesive film, which differs from Embodiment 1 only in that the red light conversion agent is replaced by lissamine rhodamine B, and the other components, dosages and preparation methods are the same as those in Embodiment 1.

[0102] Embodiment 20

[0103] This embodiment provides a light conversion packaging film, which is different from Example 1 only in that the green light conversion agent is replaced by fluorescent yellow YG-51, and other components, dosages and preparation methods are the same as those in Example 1.

[0104] Embodiment 21

[0105] This embodiment provides a light conversion packaging adhesive film, which is different from the embodiment 1 only in that 3-methacryloxypropylmethyltrimethoxysilane is not added, and other components, amounts and preparation methods are the same as those in the embodiment 1.

[0106] Embodiment 22

[0107] This embodiment provides a light conversion packaging adhesive film, which is different from the embodiment 1 only in that 2,6-di-tert-butyl-4-methylphenol is not added, and other components, dosages and preparation methods are the same as those in the embodiment 1.

[0108] Comparative Example 1

[0109] This comparative example provides a light conversion packaging film, which is different from Example 1 only in that, under the premise of keeping the weight ratio of the red light conversion agent, the green light conversion agent and the blue light conversion agent unchanged, the total addition amount of the three is increased to 2 parts by weight, and the other components, dosages and preparation methods are the same as those in Example 1.

[0110] Comparative Example 2

[0111] A light conversion packaging film is disclosed, which differs from Example 1 in that, under the premise of keeping the weight ratio of a red light conversion agent, a green light conversion agent and a blue light conversion agent unchanged, the total addition amount of the three is reduced to 0.005 parts by weight, and other components, amounts and preparation methods are the same as those in Example 1.

[0112] Comparative Example 3

[0113] A light conversion packaging film is disclosed, which differs from Example 1 in that no red light conversion agent and green light conversion agent are added, the weight portion of the blue light conversion agent is 0.15 parts, and other components, dosages and preparation methods are the same as those in Example 1.

[0114] Comparative Example 4

[0115] A light conversion packaging film is disclosed, which differs from Example 1 in that no blue light conversion agent and green light conversion agent are added, the weight portion of the red light conversion agent is 0.15 parts, and other components, dosages and preparation methods are the same as those in Example 1.

[0116] Comparative Example 5

[0117] A light conversion packaging film is disclosed, which differs from Example 1 in that no red light conversion agent and blue light conversion agent are added, the weight portion of the green light conversion agent is 0.15 parts, and other components, dosages and preparation methods are the same as those in Example 1.

[0118] Application Example 1

[0119] This application example provides a photovoltaic module, and its preparation method includes: stacking glass, light conversion packaging film (Example 1), battery cells, packaging film and glass structure, and then entering a laminator, the set temperature of the laminator is 100°C, and an illumination device is arranged inside the laminator. The illumination device can emit a light source of 350-450nm, the lamination time is 20min, the lamination pressure is 60kPa, and the lamination of the module is completed when it leaves the laminator to obtain the photovoltaic module.

[0120] Application Example 2-22

[0121] This application example provides twenty-one photovoltaic modules, which differ from application example 1 in that the light conversion packaging films provided in examples 2-22 are used to replace the light conversion packaging films provided in example 1, and other structures and preparation methods are the same as those in example 1.

[0122] Comparative Application Examples 1-5

[0123] This comparative application example provides five photovoltaic modules, which differ from application example 1 in that the light conversion packaging films provided in comparative examples 1-5 are used to replace the light conversion packaging films provided in example 1, and other structures and preparation methods are the same as those in example 1.

[0124] Test Example 1

[0125] This test example performs performance tests on the photovoltaic modules provided in Use Case 1-22 and Comparative Application Example 1-5.

[0126] Test method:

[0127] (1) Component appearance: visual observation;

[0128] (2) Film transmittance: Refer to GB / T 29848-2018 and use a specific UV-visible spectrophotometer (PerkinElmer LAMBDA950) for testing. Due to the limitations of the test equipment configuration, when testing the transmittance of the UV band (280-380nm), the sample is covered with a layer of UV-transmitting visible light cut-off filter, which can cut off the converted visible light and retain the remaining unconverted UV light. When testing the visible light band (380-1100nm), no filter is required;

[0129] (3) Module power: The test standard is based on IEC61215.

[0130] Table 1

[0131]

[0132]

[0133] As can be seen from the data in Table 1, the light conversion encapsulation film provided by the present invention can significantly reduce the color of the component by compounding light conversion agents of different colors, making the color softer, and can present different colors through different combinations to meet market demand. In addition, the light conversion encapsulation film provided by the present invention can effectively convert light below 380nm into visible light above 380nm, thereby improving the power and reliability of photovoltaic components.

[0134] By comparing Application Example 1 with Application Examples 6-18, it can be seen that using the compounds represented by Formulas Ia and Ib as blue light conversion agents can further improve the aging resistance of photovoltaic modules compared with other blue light conversion agents.

[0135] Comparing Application Example 1 with Application Examples 21-22, it can be seen that if no coupling agent is added, the adhesive performance of the film will decrease, and the power of the component will decrease significantly after aging. Antioxidants have a protective effect on the photoconverter, and if no antioxidant is added, the power of the component will decrease significantly after aging.

[0136] Comparing Application Example 1 with Comparative Application Examples 1-2, it can be seen that the amount of photoconverter used will also affect the power of the photovoltaic module. When the amount of photoconverter used is too large, although the transmittance of the film in the ultraviolet band decreases, the transmittance of visible light also decreases, which leads to a decrease in the initial power of the module and excessively high costs. When the amount of photoconverter used is too small, the transmittance in the ultraviolet band is large, the protection of the battery cell is small, and the module attenuation after UV aging is large.

[0137] By comparing Application Example 1 with Comparative Application Examples 3-5, it can be seen that compared with a single photoconversion agent, the compound use of photoconversion agents of different colors can effectively improve the conversion efficiency of each ultraviolet band, thereby effectively increasing the power of the photovoltaic module, while also effectively improving the aging resistance of the photovoltaic module.

[0138] The applicant declares that the present invention illustrates the technical solution of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

[0139] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0140] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A light conversion encapsulation film, characterized in that: The raw materials for preparing the light conversion packaging glue include the following components in parts by weight: Resin 96-98 parts; Main cross-linking agent 0.4-1 part; 0.4-1 part of auxiliary cross-linking agent; Photoconverter 0.01-0.2 parts; The light conversion agent includes a combination of at least two of a blue light conversion agent, a red light conversion agent, or a green light conversion agent.

2. The light conversion encapsulation film according to claim 1, characterized in that: The resin includes any one of POE resin, EVA resin or POE / EVA co-extruded resin or a combination of at least two thereof; Preferably, the primary cross-linking agent is a peroxide cross-linking agent; Preferably, the peroxide crosslinking agent includes any one or a combination of at least two of tert-butyl peroxide 2-ethylhexyl carbonate, tert-amyl peroxide 2-ethylhexyl carbonate, 2,5-dimethyl-2,5-bis(tert-butyl peroxide) hexane, tert-butyl peroxide-3,5,5-trimethylhexanoate, di(4-methylbenzoyl) peroxide, dibenzoyl peroxide, 1,1-di-tert-butyl peroxycyclohexane, tert-butyl peroxy-2-ethylhexyl carbonate, n-butyl-4,4-di(tert-butyl peroxy) valerate, diisopropylbenzene peroxide, α,α′-bis(tert-butyl peroxy)-1,3-diisopropylbenzene or 1,1-bis(tert-butyl peroxy)-3,3,5-trimethylcyclohexane.

3. The light conversion encapsulation film according to claim 1 or 2, characterized in that: The auxiliary crosslinking agent includes any one of triallyl isocyanurate, trimethallyl isocyanate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, ethoxylated trimethylolpropane triacrylate or propoxylated trimethylolpropane triacrylate, or a combination of at least two thereof.

4. The light conversion encapsulation film according to any one of claims 1 to 3, characterized in that: The light conversion agent includes any one or a combination of at least two of benzotriazole light conversion agents, organic fluorescent pigments, rare earth organic complexes, rare earth inorganic compounds, CdSe quantum dots or perovskite quantum dots; Preferably, the blue light conversion agent comprises any one or a combination of at least two of the compounds represented by Formula Ia and Ib, and the structural formulas of Formula Ia and Ib are as follows: in: A0 is selected from substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C2-C30 alkenyl, substituted or unsubstituted C1-C30 heteroalkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, substituted or unsubstituted amino; A1 is selected from substituted or unsubstituted C1-C30 alkylene, substituted or unsubstituted C2-C30 alkenylene, substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C3-C30 heteroarylene, ketone, ester, Ar is selected from substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl; R1 is selected from H, C1-C30 alkyl, C2-C30 alkenyl, C6-C30 aryl, C3-C30 heteroaryl, C7-C30 aralkyl, C7-C30 alkylaryl; R2 is selected from substituted or unsubstituted C1-C30 alkylene, substituted or unsubstituted C2-C30 alkenylene, substituted or unsubstituted C6-C30 arylene, substituted or unsubstituted C3-C30 heteroarylene, ketone, ester; The D1 and D2 are each independently selected from substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl; Preferably, the heteroaryl group is selected from benzothiazolyl, benzoxazinyl, quinazolinyl, quinolyl, isoquinolyl, quinoxalinyl, pyridyl, pyrrolyl, oxazolyl, indolyl, pyridazinyl, pyrimidinyl, pyrazinyl, 2-cyanopyridin-5-yl, furanyl, dibenzofuran-4-yl, benzofuranyl, dihydrothienodioxin, benzothienyl, dibenzothienyl; Preferably, the substitution refers to substitution by one or more groups individually and independently selected from C1-C6 alkyl, C1-C6 alkenyl, C1-C6 alkynyl, C3-C7 cycloalkyl, geminal cycloalkyl, C1-C6 heteroalkyl, C3-C10 heterocycloalkyl, aryl, aralkyl, heteroaryl, halo, cyano, hydroxy, cyclic imido, amino, C1-C6 alkoxy, aryloxy, thiol, halo (C1-C6) alkyl, C1-C6 alkylthio, arylthio, mono- and di- (C1-C6) alkylamino, quaternary ammonium salt, amino (C1-C6) alkoxy, hydroxy (C1-C6) alkylamino, amino (C1-C6) alkylthio, nitro, carbamoyl, carboxyl, glycolyl, glycyl, hydrazine, amidino, sulfonamide, thiocarboxyl, N-carbamate, O-carbamate, urea and combinations thereof; Preferably, the red light conversion agent includes dimethyldiaminoxanthenyl chloride, lissamine rhodamine B, fluorescent red GG, 4-dicyano-methylene-2-methyl-6-p-dimethylaminophenylvinyl-4H-pyran or Eu 3+ Any one or a combination of at least two of the following complexes; Preferably, the green light conversion agent includes acridine yellow, fluorescent yellow YG-51, sodium fluorescein or Tb 3+ Any one or a combination of at least two of the above-mentioned complexes.

5. The light conversion encapsulation film according to any one of claims 1 to 4, characterized in that: The raw materials for preparing the light conversion packaging film further include 0.05-0.5 parts of a coupling agent by weight; Preferably, the coupling agent includes 3-methacryloxypropylmethyltrimethoxysilane, 3-glycidylpropyltrimethoxysilane, vinyltrimethoxysilane, 3-aminopropyltriethoxysilane, vinyltrimethoxysilane, triisostearoyl isopropyl titanate and isopropyl tris(dioctyl pyrophosphate acyloxy) titanate, isocyanatepropyltrimethoxysilane, isocyanatepropyltriethoxysilane, 1,3.5-tris(trimethoxysilylpropyl)isocyanurate, silane oligomer, 3-(methacryloxy)propyltrimethoxysilane, alkoxysilane or vinyltrimethoxysilane, or any one or a combination of at least two thereof.

6. The light conversion encapsulation film according to any one of claims 1 to 5, characterized in that: The raw materials for preparing the light conversion encapsulation film further include 0.1-1 parts of light stabilizer by weight; Preferably, the light stabilizer includes any one of a light shielding agent light stabilizer, a quencher light stabilizer, a free radical scavenger light stabilizer or a hydroperoxide decomposer light stabilizer, or a combination of at least two of them.

7. The light conversion encapsulation film according to any one of claims 1 to 6, characterized in that: The raw materials for preparing the light conversion packaging film also include 0.1-1 parts of antioxidant by weight; Preferably, the antioxidant includes any one of hindered phenol antioxidants, aromatic amine antioxidants, phosphite antioxidants, thioether antioxidants or metal passivator antioxidants, or a combination of at least two thereof.

8. A method for preparing the light conversion packaging film according to any one of claims 1 to 7, characterized in that: The preparation method comprises: mixing raw materials in proportion, and forming a film by casting to obtain the light conversion packaging adhesive film.

9. A photovoltaic module, characterized in that: The photovoltaic module comprises the light conversion encapsulation film as described in any one of claims 1 to 7.

10. The photovoltaic module according to claim 9, characterized in that: The photovoltaic module comprises a front glass plate, a light conversion packaging film, a battery sheet, a packaging film and a rear glass plate which are stacked.

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