Photovoltaic white adhesive film

Abstract

The invention discloses a photovoltaic white adhesive film which is composed of a white adhesive film reflecting layer I and a white adhesive film reflecting layer II which are arranged in a stacked mode, the reflectivity of the reflecting layer I ranges from 75% to 95%, and the reflectivity of the reflecting layer II ranges from 10% to 85%. The reflectivity of the reflecting layer I is higher than that of the reflecting layer II. The two adhesive film reflecting layers are compounded through a compounding process, or the reflecting layers are laid on the back surface of the battery piece andlaminated. A reflective filler is added into the white adhesive film; and the reflective filler is selected from titanium dioxide, silicon dioxide, glass beads and the like. According to the compositephotovoltaic white adhesive film, the cost of the reflective filler can be reduced (the addition amount of the reflective filler in the adhesive film with low reflectivity is lower, or the reflectiveadhesive film is prepared by adopting the reflective filler with low cost) on the premise of the same power gain; or higher or the same power gain is obtained on the premise that the addition amountof the reflective filler is the same or lower, and very high economic value and promotional value are achieved.

Description

technical field [0001] The invention relates to a photovoltaic white adhesive film, which belongs to the technical field of photovoltaic adhesive films. Background technique [0002] Along with environmental pollution and energy crisis, people have begun to devote themselves to the development of new renewable energy. Due to the inexhaustible renewable nature of solar energy, more and more attention has been paid to the rational use of solar energy. Solar cells based on photoelectric conversion technology are an important direction. Therefore, how to improve the photoelectric conversion efficiency of solar cells and reduce the cost, so that it has a cost comparable to traditional energy sources such as coal power, has always been the direction of efforts of researchers in this field. [0003] Highly reflective white film is a research hotspot, which can reabsorb the light through the gap between the reflected cells and be reabsorbed by the cells, thereby increasing the pow...

AI Technical Summary

Problems solved by technology

However, after the white reflective filler is added, it will overflow to the surface of the battery sheet during lamination. After continuous improvement by industry researchers, there are many ways to avoid the overflow of the white reflective filler, but the price of the white reflective filler with better reflection effect is high. , will increase the cost

In the prior art, most of the research on white high-reflection film focuses on improving its reflectivity and addition ratio. How to achieve higher power gain with a lower addition ratio. The reflectivity and power gain effects of high-reflection film are Does not have an absolute linear relationship, involving less research results