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CN-121406235-B - High-light-transmittance weather-proof coated glass for photovoltaic module and preparation method thereof

CN121406235BCN 121406235 BCN121406235 BCN 121406235BCN-121406235-B

Abstract

The application discloses high-light-transmission weather-proof coated glass for a photovoltaic module and a preparation method thereof, and relates to the technical field of semiconductor photovoltaic modules. The preparation method comprises the steps of adding carboxyl modified cadmium telluride quantum dots, hyperbranched polysiloxane and organic silicon resin into an ethanol aqueous solution, stirring to obtain a quantum light conversion layer coating liquid, adding vinyl modified hyperbranched polysiloxane, ammonium persulfate and vinyl monomer into a composite solvent, uniformly mixing to obtain a light transmission protective layer coating liquid, rolling the quantum light conversion layer coating liquid on the surface of a glass substrate, curing to form a quantum light conversion layer, rolling the light transmission protective layer coating liquid on the surface of the quantum light conversion layer, and curing to form a light transmission protective layer, thus obtaining coated glass. The coated glass prepared by the application has good heat and humidity resistance and high light transmittance, and is beneficial to improving the performance of a semiconductor photovoltaic module.

Inventors

  • LIAO WEI
  • Weng Shimeng
  • LUO LAIHENG

Assignees

  • 江苏威光玻璃技术股份有限公司

Dates

Publication Date
20260512
Application Date
20251230

Claims (9)

  1. 1. The high-light-transmission weather-resistant coated glass for the photovoltaic module is characterized by comprising a glass substrate, a quantum light conversion layer and a light-transmission protective layer, wherein the quantum light conversion layer and the light-transmission protective layer are sequentially arranged on the surface of the glass substrate; The light-transmitting protective layer comprises the following raw materials, by weight, 2-5% of vinyl modified hyperbranched polysiloxane, 0.5-0.8% of ammonium persulfate, 8-12% of vinyl monomer and the balance of a composite solvent; The vinyl modified hyperbranched polysiloxane is prepared from hyperbranched polysiloxane, triethylamine and 1-amino-10-undecene; The vinyl monomer comprises 9, 9-bis [4- (2-acryloyloxyethoxy) phenyl ] fluorene, methacrylate-terminated polydimethylsiloxane, methyl methacrylate, 3- (methacryloyloxy) propyl trimethoxysilane and 2, 3-pentafluoro-2-fluoropropylacrylate with the mass ratio of 1 (1.2-1.5) (2-3) (0.3-0.5) (0.8-1).
  2. 2. The high-transmittance weather-proof coated glass for the photovoltaic module, which is disclosed in claim 1, is characterized in that the thickness of the quantum light conversion layer is 80-120 nm, and the thickness of the light-transmittance protective layer is 100-180 nm.
  3. 3. The high-transmittance weather-proof coated glass for the photovoltaic module, which is disclosed in claim 1, is characterized in that the raw materials of the quantum light conversion layer comprise, by weight, 4-6% of carboxyl modified cadmium telluride quantum dots, 4-8% of hyperbranched polysiloxane, 6-15% of organic silicon resin and the balance of ethanol aqueous solution.
  4. 4. The high-transmittance weather-proof coated glass for a photovoltaic module according to claim 3, wherein the preparation method of the hyperbranched polysiloxane is characterized in that n-dodecyl trimethoxy silane, 3- (2, 3-glycidoxy) propyl trimethoxy silane and aqueous hydrochloric acid are added into an ethanol aqueous solution, reacted for 5-7 hours at room temperature, then reacted for 3-5 hours at 60-80 ℃, then reacted for 1-3 hours at 50-70 ℃ by adding 1, 3-tetramethyl disiloxane, then reacted for 4-6 hours at 60-80 ℃, purified and dried, and the hyperbranched polysiloxane is obtained.
  5. 5. The high-transmittance weather-proof coated glass for photovoltaic modules according to claim 4, wherein the mass ratio of n-dodecyl trimethoxy silane, 3- (2, 3-glycidoxy) propyl trimethoxy silane, aqueous hydrochloric acid solution and 1, 3-tetramethyl disiloxane in the hyperbranched polysiloxane is 100 (20-30): 4-6): 10-15.
  6. 6. The high-transmittance weather-proof coated glass for the photovoltaic module, which is disclosed in claim 1, is characterized in that the preparation method of the vinyl modified hyperbranched polysiloxane comprises the steps of adding the hyperbranched polysiloxane, triethylamine and 1-amino-10-undecene into DMF, reacting for 4-6 hours at 50-70 ℃, purifying and drying to obtain the vinyl modified hyperbranched polysiloxane.
  7. 7. The high-transmittance weather-proof coated glass for the photovoltaic module, which is disclosed in claim 6, is characterized in that the mass ratio of hyperbranched polysiloxane, triethylamine and 1-amino-10-undecene in the vinyl modified hyperbranched polysiloxane is (10-12): 0.02-0.05): 1.
  8. 8. The preparation method of the high-transmittance weather-resistant coated glass for the photovoltaic module according to any one of claims 1 to 7 is characterized by comprising the following steps: Adding carboxyl-modified cadmium telluride quantum dots, hyperbranched polysiloxane and organic silicon resin into an ethanol aqueous solution, and stirring for 3-5 hours at 40-60 ℃ to obtain a quantum light conversion layer coating solution; Step 2, adding vinyl modified hyperbranched polysiloxane, ammonium persulfate and vinyl monomer into a composite solvent, and uniformly mixing to obtain a light-transmitting protective layer coating liquid; And step 3, rolling the coating liquid of the quantum light conversion layer on the surface of the glass substrate, curing for 10-30 min at 80-100 ℃ to form the quantum light conversion layer, and then rolling the coating liquid of the light transmission protective layer on the surface of the quantum light conversion layer, and curing for 5-8 min at 120-140 ℃ to form the light transmission protective layer to obtain the coated glass.
  9. 9. The application of the high-light-transmission weather-resistant coated glass for the photovoltaic module is characterized in that the coated glass is used in the photovoltaic module.

Description

High-light-transmittance weather-proof coated glass for photovoltaic module and preparation method thereof Technical Field The invention relates to the technical field of semiconductor photovoltaic modules, in particular to high-light-transmission weather-resistant coated glass for a photovoltaic module and a preparation method thereof. Background Semiconductor photovoltaic modules, often referred to as solar panels, are the core energy conversion units of solar power generation systems. The performance of the system directly determines the solar energy absorption and photoelectric conversion efficiency of the system. The semiconductor photovoltaic module mainly comprises parts such as coated glass, a sealing adhesive film, a semiconductor battery piece, a back plate, a frame and the like, wherein the coated glass is used as an outermost cover plate of the module, and plays a key role in protecting other parts and receiving solar rays. The quantum dots are used as key components of the coated glass, ultraviolet photons with low battery utilization rate are converted into visible light with high battery responsiveness by utilizing the quantum confinement effect, so that the thermalization loss of high-energy photons can be effectively reduced, the photon utilization rate is improved, and the photoelectric conversion efficiency of the component is improved from the optical level. Meanwhile, in the photoelectric conversion process, the effective input of light is taken as a fundamental premise, and the loss caused by photon light transmission needs to be reduced as much as possible, so that the coated glass is required to provide protection for other photovoltaic modules and ensure high light transmittance. However, in practical use, people find that the quantum dots can be subjected to fluorescence quenching for a long time under a damp and hot environment to cause functional failure and even influence interface stability, so that the quantum dots cannot play a remarkable role, the coating layer can be subjected to microcracking caused by large stress to cause water vapor invasion, the matrix and more quantum dots are damaged, the protection function of the coating layer is remarkably reduced, the light transmittance of the coated glass is remarkably reduced, and the performance of the semiconductor photovoltaic module is remarkably reduced. In summary, in order to solve the problems, the high-transmittance weather-proof coated glass for the photovoltaic module and the preparation method thereof are prepared. Disclosure of Invention The invention aims to provide high-light-transmission weather-proof coated glass for a photovoltaic module and a preparation method thereof, so as to solve the problems in the background technology. In order to solve the technical problems, the invention provides the following technical scheme: the high-light-transmission weather-proof coated glass for the photovoltaic module comprises a glass substrate, a quantum light conversion layer and a light-transmission protective layer, wherein the quantum light conversion layer and the light-transmission protective layer are sequentially arranged on the surface of the glass substrate, and the quantum light conversion layer contains carboxyl-modified cadmium telluride quantum dots. More preferably, the thickness of the quantum light conversion layer is 80-120 nm, and the thickness of the light transmission protective layer is 100-180 nm. More optimally, the quantum light conversion layer comprises the following raw materials, by weight, 4-6% of carboxyl modified cadmium telluride quantum dots, 4-8% of hyperbranched polysiloxane, 6-15% of organic silicon resin and the balance of ethanol aqueous solution; The light-transmitting protective layer comprises the following raw materials, by weight, 2-5% of vinyl modified hyperbranched polysiloxane, 0.5-0.8% of ammonium persulfate, 8-12% of vinyl monomer and the balance of a composite solvent. In a further scheme, in the composite solvent, the mass ratio of the ethanol to the deionized water to the butyl acetate is (3-5): (2-3): 1. More optimally, the preparation method of the hyperbranched polysiloxane comprises the steps of adding n-dodecyl trimethoxy silane, 3- (2, 3-epoxypropoxy) propyl trimethoxy silane and an aqueous solution of hydrochloric acid into an aqueous solution of ethanol, reacting for 5-7 h at room temperature, then reacting for 3-5 h at 60-80 ℃, adding 1, 3-tetramethyl disiloxane, reacting for 1-3 h at 50-70 ℃, then reacting for 4-6 h at 60-80 ℃, purifying and drying to obtain the hyperbranched polysiloxane. More optimally, in the hyperbranched polysiloxane, the mass ratio of n-dodecyl trimethoxy silane to 3- (2, 3-epoxypropoxy) propyl trimethoxy silane to hydrochloric acid aqueous solution to 1, 3-tetramethyl disiloxane is 100 (20-30): 4-6): 10-15. In a further embodiment, the concentration of the aqueous hydrochloric acid solution is 0.1mol/L aqueous hydrochloric acid solution