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CN-121991601-A - High-oxidation-resistance migration-resistance light conversion micro-cluster, packaging adhesive film and photovoltaic module

CN121991601ACN 121991601 ACN121991601 ACN 121991601ACN-121991601-A

Abstract

The invention belongs to the technical field of photovoltaic materials, and in particular relates to a high-oxidation-resistance migration-resistance light conversion micelle, a packaging adhesive film and a photovoltaic module, which comprise a functional inner core and a shell layer coated on the surface of the functional inner core; the functional core comprises a chromophore with down-conversion capability, wherein the chromophore comprises benzotriazole monomers containing silicon atoms or carbon-carbon double bonds, hydroxyl groups, carboxyl groups, carbonyl groups, ester groups and amide groups, the benzotriazole monomers are hydrolyzed and condensed into annular macromolecules through siloxane bonds, the benzotriazole cyclized product is obtained, the shell layer is a high-oxygen-resistant protective layer, the light conversion micro-groups are mutually bonded through the siloxane bonds to form an oligomer core micro-group with an annular or net-shaped structure, and the light conversion micro-group with the large molecular weight can keep fixed positions in the melt flow stage before storage and transportation to lamination.

Inventors

  • HUANG BAOYU
  • JI ZHICHAO
  • ZHANG GANG
  • QIAN JUNYING
  • LI YANG
  • LV SONG

Assignees

  • 常州斯威克光伏新材料有限公司
  • 江苏科技大学

Dates

Publication Date
20260508
Application Date
20260130

Claims (10)

  1. 1. A light-converting micro-cluster, which comprises a micro-cluster body, characterized by comprising the following steps: a functional inner core and a shell layer coated on the surface of the functional inner core; the functional core comprises a chromophore with down-conversion capability; The chromophore comprises benzotriazole monomers containing silicon atoms or carbon-carbon double bonds, hydroxyl groups, carboxyl groups, carbonyl groups, ester groups and amide groups, and is condensed into cyclic macromolecules through siloxane bonds, so as to obtain benzotriazole cyclized products; The shell layer is a high oxygen-blocking protective layer; the light conversion micro-groups are mutually bonded by silicon-oxygen bonds to form an oligomer core micro-group with a ring-shaped or net-shaped structure.
  2. 2. The light-converting micelle of claim 1 in which, The molecular formula of the benzotriazole monomer containing silicon atom or carbon-carbon double bond, hydroxyl, carboxyl, carbonyl, ester group and amide group is as follows: ; wherein R is a siloxane group or other functional group, and n ranges from 2< n <15.
  3. 3. The light-converting micelle of claim 1 in which, The molecular formula of the benzotriazole cyclized product comprises: 、 、 、 、 、 、 、 any one or a combination of a plurality of the above.
  4. 4. The light-converting micelle of claim 1 in which, The high oxygen barrier protective layer comprises at least one of ethylene-vinyl alcohol copolymer or polyvinyl alcohol copolymer.
  5. 5. The light-converting micelle of claim 1 in which, The particle size of the light conversion micro-clusters is 100-160 nm; the grain diameter of the functional kernel is 80-110 nm; The thickness of the shell layer is 20-50 nm.
  6. 6. A method for preparing the light-converting micelle as set forth in any one of claims 1 to 5, comprising the steps of: s1, dispersing benzotriazole monomers containing silicon atoms or other functional groups into nano-scale microemulsion drops, and performing siloxane hydrolysis-condensation to form a functional core; s2, adding a shell material and a cross-linking agent/initiator into the microemulsion containing the functional kernel to initiate molecular cross-linking of the shell material, and forming compact coating on the surface of the functional kernel to obtain the light conversion micelle.
  7. 7. An encapsulating adhesive film, which is characterized by comprising at least one light conversion micelle and an organic polymer material according to any one of claims 1-5, and comprises the following components in parts by mass: 100 parts of organic polymer material, 0.01-2 parts of light conversion micro-groups, 0.01-1.1 parts of light stabilizer, 0.1-2 parts of cross-linking agent, 0.1-2 parts of auxiliary cross-linking agent and 0.1-1.2 parts of silane coupling agent.
  8. 8. The packaging film of claim 7, wherein, The thickness of the packaging adhesive film is 10-1000 mu m, and the mass ratio of the light conversion micro-clusters with high oxidation resistance and migration resistance is 0.01-2wt%.
  9. 9. The packaging film of claim 7, wherein, The organic high molecular material comprises any one or a combination of a plurality of thermoplastic polyolefin, polyvinyl butyral, polyolefin elastomer, polyurethane, thermoplastic polyurethane, polyacrylate, ethylene-vinyl acetate copolymer, organosilicon and EEA ionic polymer.
  10. 10. The photovoltaic module is characterized by sequentially comprising glass, a first packaging adhesive film, a battery piece, a second packaging adhesive film, a back plate or glass from top to bottom; wherein the first packaging adhesive film is the packaging adhesive film according to any one of claims 7-9.

Description

High-oxidation-resistance migration-resistance light conversion micro-cluster, packaging adhesive film and photovoltaic module Technical Field The invention belongs to the technical field of photovoltaic materials, and particularly relates to a high-oxidation-resistance migration-resistance light conversion micelle, a packaging adhesive film and a photovoltaic module. Background The light conversion adhesive film can prevent ultraviolet rays from damaging the packaging adhesive film and the silicon battery by converting ultraviolet rays or part of visible light into visible-near infrared light, and meanwhile, the spectral response of the silicon battery is better matched with solar spectrum, so that the power of the assembly is improved, and the light conversion adhesive film becomes one of important technical paths for improving the power generation capacity of the battery and reducing the electricity cost. The small molecular organic fluorescent agent or rare earth complex is used as a light conversion agent, and the low molecular active substances have limited solubility in an organic matrix, are easy to migrate, separate out and agglomerate and quench, have insufficient oxygen blocking capability and are difficult to resist oxidative aging. Once the light conversion reagent is invalid, the packaging adhesive film can generate photooxidation, hydrolysis and free radical cracking under the synergistic effect of ultraviolet rays, so that yellowing is caused, meanwhile, unconverted ultraviolet rays penetrate through the adhesive film to directly damage a battery piece, and the output power and the service life of the assembly are further reduced. There are techniques for anti-migration light transfer agents that "anchor" the light transfer component by introducing unsaturated bonds or heteroatoms into the molecule, which covalently crosslink with the matrix resin during lamination. However, the chemical bonding is only effective during the lamination stage, and the transfer agent may still migrate due to poor compatibility during the previous film storage and transportation, and the potential performance degradation and contamination risk are not eradicated. Therefore, how to overcome the migration risk of the transfer agent before lamination in the light conversion adhesive film is a technical problem to be solved in the art. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of Invention The embodiment of the disclosure at least provides a high-oxidation-resistance migration-resistance light conversion micelle, a packaging adhesive film and a photovoltaic module. According to the first aspect, the embodiment of the disclosure provides a light conversion micelle, which comprises a functional inner core and a shell layer coated on the surface of the functional inner core, wherein the functional inner core comprises a chromophore with down-conversion capability, the chromophore comprises benzotriazole monomers containing silicon atoms or carbon-carbon double bonds, hydroxyl groups, carboxyl groups, carbonyl groups, ester groups and amide groups, the benzotriazole monomers are hydrolyzed and condensed into a cyclic macromolecule through a silicon-oxygen bond to obtain a benzotriazole cyclized product, the shell layer is a high oxygen-resistant protective layer, and the light conversion micelle is mutually bonded through the silicon-oxygen bond to form an oligomer core micelle with a cyclic or net-shaped structure. In an alternative embodiment, the benzotriazole monomer containing a silicon atom or a carbon-carbon double bond, a hydroxyl group, a carboxyl group, a carbonyl group, an ester group, an amide group has the formula: ; wherein R is a siloxane group or other functional group, and n ranges from 2< n <15. In an alternative embodiment, the benzotriazole cyclized compound has a formula comprising: 、、、、、、 、 any one or a combination of a plurality of the above. In an alternative embodiment, the high oxygen barrier protective layer includes at least one of an ethylene-vinyl alcohol copolymer or a polyvinyl alcohol copolymer. In an alternative implementation mode, the particle size of the light conversion micelle is 100-160 nm, the particle size of the functional core is 80-110 nm, and the thickness of the shell layer is 20-50 nm. In a second aspect, the embodiment of the disclosure also provides a preparation method of the light conversion micelle, which comprises the following steps of S1, dispersing benzotriazole monomers containing silicon atoms or other functional groups into nano-scale microemulsion drops, performing siloxane hydrolysis-condensation to form a functional core, S2, adding a shell material and a cross-linking agent/initiator into the microemulsion containing the functional core, initiat