Research Progress of Light Wavelength Conversion Materials and Their Applications in Functional Agricultural Films

Abstract

As new fluorescent materials, light wavelength conversion materials (light conversion agents) have attracted increasing attention from scientific researchers and agricultural materials companies due to their potential advantages in efficiently utilizing solar energy and increasing crop yield. According to the material properties, the light conversion agents can be divided into fluorescent dyes, organic rare-earth complexes, and inorganic rare-earth complexes. The current researches indicates that the fluorescent dyes have relatively high production costs, poor light stability, difficult degradation processes, and easily cause pollution to the ecological environment. The organic rare-earth complexes have short luminescence times, high production costs, and suffer from rapid decreases in luminescence intensity. Compared with fluorescent dyes and organic rare-earth complexes, although rare-earth inorganic complexes have high luminous efficiency, stable chemical properties, and better spectral matching performance, the existing inorganic light conversion agents have relatively poor dispersibility in agricultural films. According to the research on light conversion agents at home and abroad in recent years, this paper first introduces the three common light conversion agents, namely fluorescent dyes, organic rare-earth complexes, and inorganic rare-earth complexes, as well as their uses in agricultural films and their mechanisms of light conversion. At the same time, the preparation methods, advantages, disadvantages, and existing problems of various light conversion agents are classified and explained. Finally, we predict the development trends for light conversion agents in the future by considering six aspects, namely efficiency, cost, compatibility with greenhouse films, light matching, and light transmittance, in order to provide a reference for the preparation of stable and efficient light conversion agent materials.

Effects of rare-earth light conversion film on the growth and fruit quality of sweet pepper in a solar greenhouse

“…Different light conversion agents added into the film may cause different light spectrum ( Kang et al, 2022 ). Additionally, the study found that rare-earth conversion film improved light transmittance, consistent with the previous research ( Liu et al, 2022 ). Rare-earth light conversion films can improve the greenhouse environment significantly.…”

Cyano-capped molecules: versatile organic materials

“…Aggregation-induced emission (AIE) and TADF were utilized as two leading mechanisms in the design of organic light conversion agents. 123 Variety of π-conjugated organic scaffolds were already examined, with triphenylacrylonitrile proving to be a benchmark compound. For instance, Wang et al have optimized the parent triphenylacrylonitrile backbone by attaching additional aryls at positions 3 and 4 leading to derivatives 36a–e (Fig.…”

Tunable Red Clusteroluminescence Polymers Prepared by a Simple Heating Process

“…16,22 Even though much effort has been made to create red emission CLgens, such as copolymerization of itaconic anhydride and N-vinyl caprolactam, hydrolysis of poly PMV with NaOH, halogenated succinimide, and maleimide derivatives, and anionic polymerization of maleimide, 10,23−26 convert UV light and useless green light to blue (400−500 nm) or red light (600−700 nm) and boost the production of the crop as a result of the selective absorption ability of chlorophyll A, chlorophyll B, and other photosynthetic organisms in plants. 27,28 However, traditional light conversions agents, such as fluorescent dyes or rare-earth complexes, is suffered enough from poor photostability, high cost, bad compatibility, and difficult degradation processes. A new type of light conversion agent is urgently needed.…”