Light conversion film capable of promoting plant growth and preparation method thereof

Abstract

The invention discloses a light conversion film capable of promoting plant growth and a preparation method thereof, wherein the light conversion film comprises garnet fluorescent powder with the formula of Y(3-x)BaxAl(5-x)SixO12: mCe, nCr, 0 <= x <= 1, m > 0 and n > 0, and a polymer resin or glass with refractive index of 1.4-1.65, wherein the garnet fluorescent powder is uniformly dispersed in the polymer resin or glass. The preparation method comprises the following steps: (1) respectively weighing compound raw materials of yttrium, aluminum, barium, silicon, chromium and cerium according tothe stoichiometric ratio of each chemical composition of an expression, mixing, and grinding to a micron scale; 2) calcining the raw material powder in a reducing atmosphere for 4-5 hours to obtain acalcined product; and 3, grinding the calcined product to a micron order to prepare Ce and Cr-containing fluorescent powder with a garnet structure, mixing the fluorescent powder with polymer resin according to a mass ratio of 1:4-1:1, and preparing the light conversion film according to the existing film preparation process. The fluorescent powder has the advantages that the emission intensity of the fluorescent powder in a red light region is greatly enhanced, the plant light supplementing capability is high, the efficiency is high, and plant growth is promoted.

Description

technical field [0001] The invention belongs to the technical field of agricultural light conversion materials, and relates to a light conversion film used for plant growth. Background technique [0002] Plants need light to provide energy in the process of growth and development, so the regulation of light is one of the important means to regulate plant growth. Phosphor powder for plant growth is a phosphor powder that promotes rapid growth of plants and shortens the maturity cycle. Plants absorb light mainly through chlorophyll and carotenoids, which absorb light in the blue light region (400nm-500nm) and red light region (600nm-700nm), and phytochrome absorbs red light and deep red (650nm -750nm) region, corresponding to phototropism, photosynthesis and photomorphogenesis, respectively. Among them, the most important thing for plant growth is the light in the red light region (600nm-700nm), because red light has a great influence on the flowering and mature stages of pla...

AI Technical Summary

Problems solved by technology

However, LED plant lights have many disadvantages: the spectral curves of LED plant lights currently on the market are quite different from those absorbed by plant photosynthesis, the energy utilization rate of light sources is not high, the price of LED chips is high, and a large amount of power resources are consumed

In addition, this method of covering plants with a film cannot provide strong red light to the plants, because half of the red light emitted by the film is emitted outside the plants.

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