Laminated antireflective film for single-crystalline-silicon-like solar cell

Abstract

The invention discloses a laminated antireflective film for a single-crystalline-silicon-like solar cell. A ZnO hollow sphere film (2) and a silicon nitride film (1) are sequentially arranged on the front surface of a monocrystalline-silicon-like piece (3) of a solar cell from the inside to the outside; the thickness of the ZnO film (2) is 15-20nm; and the thickness of the silicon nitride film (1) is 30-40nm. According to the laminated antireflective film provided in the invention, the refractive index of the used ZnO hollow sphere film is 2.03, and the refractive index of the silicon nitride film is 1.4-1.7, and compared with a single-layer film, the laminated film has a better optical matching property, not only has an excellent antireflective effect on the 550nm-light responding to the main spectrum of silicon, but also has good reflection and absorption effects on the light with the wavelength being 300-1200nm, so that the conversion efficiency of the single-crystalline-silicon-like solar cell is improved.

Description

technical field [0001] The invention relates to an anti-reflection film structure of a solar cell, in particular to a laminated anti-reflection film structure, in particular to a laminated anti-reflection film for a similar monocrystalline silicon solar cell. [0002] Background technique [0003] A solar cell is a device that converts solar light energy into electrical energy. The conversion efficiency of a solar cell is generally defined as the ratio of the output power of the cell to the total power of sunlight incident on the surface of the cell. Sunlight will be reflected and refracted when it hits the surface of the cell. In order to improve the conversion efficiency of the cell, it is necessary to minimize the reflection loss and increase the absorption. There are currently two ways to reduce reflection. One is to make the surface of the battery sheet suede, and the other is to coat the surface of the battery sheet with an anti-reflection film. With the development...

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Problems solved by technology

[0005] The purpose of the present invention is that it is difficult to obtain an ideal anti-reflection effect for the current single-layer anti-reflection film. The multi-layer film only has a better anti-reflection effect on light with a wavelength of about 550nm, but the anti-reflection effect on sunlight with other wavelengths Limited problems, a kind of laminated anti-reflection film for monocrystalline silicon solar cells is proposed, which is a high-quality, high-performance reflective film structure

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