Photovoltaic module

Abstract

The invention provides a photovoltaic module. The photovoltaic module comprises a solar cell and a transparent backplane arranged on the light incident side of the solar cell; the photovoltaic module further comprises a selective light transmission film arranged between the solar cell and the transparent backplane, wherein the selective light transmission film is composed of at least one dielectric high reflecting film layer. As the selective light transmission film is composed of at least one dielectric high reflecting film layer, light can be regulated and reflected back into the solar cell by virtue of the property that the dielectric high reflecting film layer is capable of reflecting the light of a specific wavelength, and therefore, the photoelectric conversion efficiency of the solar cell is improved, the transmittance of the photovoltaic module to the light of the specific wavelength is reduced and the selective transmission of the photovoltaic module to the light of the specific wavelength is realized.

Description

technical field [0001] The present invention relates to the technical field of photovoltaics, in particular to a photovoltaic module. Background technique [0002] As a device that converts light energy into electrical energy through photoelectric conversion, solar cell components not only have the function of solar power generation, but also allow sunlight to shine indoors through solar cell components, so as to ensure the light in photovoltaic buildings or photovoltaic agricultural greenhouses. While lighting, realize solar power generation. [0003] However, existing crystalline silicon solar cells cannot flexibly adjust their responsiveness to specific wavelengths of light (even the ability to transmit or reflect specific wavelengths of light. When the light is strong, a large amount of light is transmitted into the interior of the building, causing the temperature inside the building to rise sharply and Indoor light pollution. And for photovoltaic agricultural greenhou...

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Problems solved by technology

And for photovoltaic agricultural greenhouses, too much light entering the inside of the big pot will affect the growth of crops

On the other hand, the optimal growth environment of plants in photovoltaic agricultural greenhouses requires different specific wavelengths of light, and light of excess wavelengths is not conducive to the growth of high value-added economic crops, which is not conducive to the promotion of photovoltaic integration in agricultural greenhouses

[0004] In order to solve the above problems, those skilled in the art have tried to carry out a series of studies, but these studies have not solved the above problems

For example, the Chinese patent with publication number CN202120945U discloses a solar cell module, which uses a highly reflective metal film on the back glass surface to reflect light back into the solar cell, but the metal film on the back of the photovoltaic module There is a problem of easy aging, and the double-sided light transmission function of photovoltaic modules cannot be realized, so it is not suitable for application in photovoltaic buildings and photovoltaic agricultural greenhouses

For another example, although the solar cell module provided by the Chinese patent with the publication number CN203503670U can realize the double-sided light transmission function of the photovoltaic module, it cannot reflect light of a specific wavelength.

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