High-light-transmittance photovoltaic packaging material adopting nucleating antireflection agent

Abstract

The invention discloses a high-light-transmittance photovoltaic packaging material adopting a nucleating antireflection agent. The photovoltaic packaging material is prepared by performing the steps of premixing, melt extrusion, casting film formation, cooling, slitting, winding and the like on photovoltaic packaging material matrix resin, graft modified matrix resin, the nucleating antireflectionagent and other auxiliary agents; by adding the nucleating antireflection agent with quantum dot nanoparticles into a packaging material system, on the one hand, the crystallization behavior of crystallizable polymer chain segments in resin structures is changed, the crystallization rate is accelerated, the crystal density is increased, the micronization of grain size is promoted, and the grain size is smaller than the visible wavelength, thereby improving the transmittance of the photovoltaic packaging material; on the other hand, the quantum dot nanoparticles have the function of convertingshort waves into long waves, can realize the conversion of high-energy photons into a large number of low-energy photons, and have the effect of photon multiplication, so that the intensity of lightincident on a battery piece is increased, the utilization of sunlight by components is enhanced, and the photoelectric conversion efficiency of components is optimized and improved.

Description

technical field [0001] The invention belongs to the field of packaging materials for photovoltaic modules, in particular to a photovoltaic packaging material with high light transmittance. Background technique [0002] Sunlight is a continuous spectrum, and its distribution range is mainly from ultraviolet light of a few tenths of a micron to infrared light of a few microns. The energy gap of silicon is 1.12eV. Crystalline silicon solar cells mainly absorb light around 400-1100nm, and have very low quantum efficiency for light below 400nm (purple light and ultraviolet light), thus causing loss of solar light energy below 400nm. Quantum dot nanoparticles have good photostability, absorption bandwidth, can absorb light lower than the wavelength of the semiconductor material absorption spectrum, and then generate light with the same wavelength as the semiconductor material absorption spectrum, and the emitted light is absorbed by the semiconductor material, increasing the The ...

AI Technical Summary

Problems solved by technology

Patent application 101353558A does not use ultraviolet light absorbers, and improves light transmittance by increasing light absorption, but because the material does not contain ultraviolet light absorbers, the long-term ultraviolet resistance and mechanical properties of EVA film may be affected

Patent application CN102656705A uses organic fluorescent dyes to dope packaging materials through wavelength conversion to improve its light transmittance, but its absorption band is narrow, and there is obvious self-absorption loss, and yellowing and light transmittance decline will occur after long-term use

Patent application CN107502232A adds a composite plasticizer composed of spiropyran and phthalates to EVA resin to improve its light transmittance, but this plasticizer is easy to migrate in a high-temperature and high-humidity environment, which affects the long-term durability of the component Reliability, the graphene oxide nanometers added to the system are expensive

At present, there is no patent report on improving the light transmittance of packaging materials by adding nucleating antireflection agents with nanoparticles with quantum effects.

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