Short-wave ultraviolet pre-crosslinking adhesive film and preparation method thereof

Abstract

The invention relates to the technical field of solar cells, in particular to a short-wave ultraviolet pre-crosslinking adhesive film and a preparation method thereof. Comprising the following raw materials in parts by weight: 90-110 parts of polymer resin, 0.2-2 parts of a short-wave ultraviolet light initiator, 0.2-2 parts of a thermal initiator, 0.5-5 parts of a crosslinking aid, 0.1-1 part of a coupling agent, 0.01-0.5 part of a light stabilizer, 0.01-0.5 part of an ultraviolet absorption aid, 0-0.5 part of an antioxidant and 10-20 parts of color master batch. According to the short-wave ultraviolet light pre-crosslinking adhesive film, the short-wave ultraviolet light initiator is added, so that the adhesive film is pre-crosslinked under the short-wave ultraviolet light condition, on one hand, the auxiliary agent fully initiates reaction under the short-wave ultraviolet light to reach a certain pre-crosslinking degree, and on the other hand, the light stabilizing auxiliary agent in the adhesive film cannot be attenuated; when the composite material is used in a solar cell, the photoelectric conversion rate and the packaging formability of a cell module can be improved, and the service life can be prolonged.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a short-wave ultraviolet light pre-crosslinked adhesive film and a preparation method thereof. Background technique [0002] With the continuous development of society, environmental pollution and energy shortage have become the biggest challenges facing human beings. Using solar cells to convert clean and renewable solar energy into electricity is one of the most effective ways to solve these two problems. Increasing the power generation of modules has also increasingly become the research and development direction of the photovoltaic industry. At present, by replacing the transparent film on the back with a white high-reflectivity film, the absorption of the long-wavelength wavelength by the photovoltaic modules is increased to increase the power generation of the cells. 0.5-1.5% component power. [0003] Patent CN108997957A discloses a white EVA encapsulation film and its...

AI Technical Summary

Problems solved by technology

[0003] Patent CN108997957A discloses a white EVA packaging adhesive film and its preparation method. After the white EVA packaging adhesive film is irradiated by an ultraviolet lamp in the 300-400nm band, the photoinitiator is excited by the 300-400nm band to obtain a cross-linking degree 10-60% pre-crosslinked adhesive film, which effectively reduces the whitening and wrinkling of the white adhesive film, but there is a deficiency in this technical solution: when the white EVA packaging adhesive film passes through 300-400nm, part of the ultraviolet band will be Among them, the absorption of the light stabilizer will easily cause two negative effects: 1. The light stabilizer in the film will be attenuated partly when it absorbs the ultraviolet band, which will affect the long-term aging of the component; 2. The photoinitiator in the film has no Completely absorbs the ultraviolet band, resulting in incomplete reaction and residue, and easy to generate bubbles during the component molding stage

Images