Solar spectrum selective transmission coating and preparation method thereof

Abstract

The invention discloses a solar spectrum selective transmission coating and a preparation method thereof. The coating comprises a first dielectric layer, a stacked structure of a metal layer and a second dielectric layer and a third dielectric layer which are sequentially prepared on a glass substrate, wherein the first dielectric layer and the second dielectric layer are made of any one of AlN, TiAlN and ZrAlN, the thickness of the first dielectric layer and the second dielectric layer is 1-100 nm, the stacked structure of the metal layer and the second dielectric layer is expressed as (M / D2)n, n is the number of stacking times, the metal layer is made of any one of Au, Ag, Cu and Al, the thickness of the metal layer is 1-30 nm, the third dielectric layer is made of any one of SiO2, TiO2, ZnO and Al2O3, and the thickness of the third dielectric layer is 1-100 nm. According to the design of the coating, high transmittance in a visible light wave band and high reflectivity in an infrared wave band can be achieved, the preparation process is easy to regulate and control, the coating area is large, and the coating adhesive force is high.

Description

technical field [0001] The invention relates to a solar spectrum selective transmission coating and a preparation method thereof, belonging to the technical field of spectral coatings. Background technique [0002] Photovoltaic modules are components that convert light energy into electrical energy in photovoltaic power generation systems, and their photoelectric conversion efficiency is the main factor that determines the efficiency of photovoltaic power generation. Photovoltaic modules are mainly composed of glass cover plates, solar cells, EVA and back plates. Taking crystalline silicon modules as an example, although the theoretical conversion efficiency limit of crystalline silicon solar cells is close to 30%, in practice the conversion efficiency of crystalline silicon modules is only about 20%. That is to say, the module only converts a small part of the absorbed solar energy into electric energy for use, while most of the remaining energy is converted into heat ener...

AI Technical Summary

Problems solved by technology

The conversion efficiency is determined by the short-circuit current density, open-circuit voltage and fill factor. The increase of the short-circuit current density cannot make up for the impact of the decrease of the open-circuit voltage and fill factor on the conversion efficiency. Therefore, as the temperature increases, the solar cell conversion Reduced efficiency

[0004] In traditional photovoltaic modules, the more sunlight absorbed, the higher the production capacity, but the rise of its own temperature will also affect the performance of the entire module

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