Solar energy battery resisting potential-induced attenuation and manufacture method thereof

Abstract

A solar cell with reduced potential induced degradation and a manufacturing method thereof are disclosed. The method includes: performing plasma cleaning on a silicon wafer (100) by using an oxidizing gas, so as to form a first silicon oxide film (101) on the surface of the silicon wafer; and forming an anti-reflection film (20) on the surface of the first silicon oxide film, where the anti-reflection film (20) includes at least a silicon oxide film (20, 200, 201, 203). Since the silicon oxide film has a good electrical insulation property and an anti-reflection effect, the solar cell manufactured by using the manufacturing method according to the embodiments of the invention has a good electrical insulation property with the packaging material, the glass substrate and so on, so the corresponding photovoltaic module has an anti potential induced degradation effect, which improves the electrical performance of the photovoltaic module operating under the high negative voltage for a long time.

Description

technical field [0001] The invention relates to the technical field of solar cell manufacturing, in particular to a solar cell sheet resistant to solar cell induced attenuation and a manufacturing method thereof. Background technique [0002] Solar energy is a kind of clean energy, and photovoltaic modules use the photovoltaic effect of the P-N junction of silicon materials to convert light energy into electrical energy, including: a glass backplane and a glass substrate set opposite to each other; between the glass backplane and the glass substrate The solar cells between them; the encapsulation frames for fixing the glass backplane, solar cells and glass substrates, etc. [0003] The traditional solar cell production process includes: texturing, diffusion, etching, chemical vapor deposition (PECVD), screen printing and sintering and other processes. Among them, texturing refers to the use of acid or alkali to corrode different surface topography on the surface of the sili...

AI Technical Summary

Problems solved by technology

[0004] However, the photovoltaic modules produced by the solar cell manufacturing process in the prior art are prone to Potential Induced Potential (PID) effect, that is, the photovoltaic modules are under the action of high negative voltage for a long time, so that the glass substrate, package There is a leakage current channel between the materials, and a large amount of charge accumulates on the surface of the solar cell, and the accumulated charge on the surface of the solar cell will attract photogenerated carriers and generate a leakage current, resulting in the fill factor FF and short-circuit current Jsc of the photovoltaic module. , open circuit voltage Voc and other electrical performance parameters are reduced, so that the electrical performance of the photovoltaic module is lower than the design standard

Images