增强植物光合作用复合型稀土转光材料的制备及发光性能

Preparation and Luminescence Properties of Composite Rare Earth Light Conversion Materials for Enhancing Plant Photosynthesis

关键词:  光合作用  稀土  转光材料  发光性能

Key words:  photosynthesis  rare earth  Translucent material  luminescent properties

摘要:

为提升可见光中红蓝光比例、灵活匹配植物对不同光质需求、增强植物光合作用，本文采用适合工业生产的高温固相等方法制备出Y2O3:Eu3+、BaMgAl10O17:Eu2+、CaSrAl2SiO7:Eu3+转光材料，将其混合制备成XT-SZ稀土转光材料。按1:1:1、2:1:1、2:2:1、4:2:1、6:4:1五种比例制备的XT-SZ转光材料保持了主要组分的物相结构，未出现新的衍射峰，表明混合过程对物相结构无显著影响。激发与发射光谱分析表明，上述5种处理的XT-SZ转光材料具有相似的发光特性，但可以通过优化组分比例来进一步提升发光性能。该材料的主发射峰主要位于约450nm（蓝光区）和620nm（红光区）两处，XT-SZ主发射峰的红、蓝光相对强度比值与Y2O3:Eu3+配比，整体呈现正相关性，Y2O3:Eu3+、CaSrAl2SiO7:Eu3+、BaMgAl10O17:Eu2+的配比为2:2:1和6:4:1时，红、蓝光相对强度比值增幅显著。在自然光原有红蓝光不变的基础上，XT-SZ可同步减少对植物生长有害的紫外光和无效的绿光，并将两者同时转化为植物生长所需的红、蓝光，提升可促进植物光合作用的光合光量子通量密度，并可通过调整配比，灵活实现XT-SZ的红、蓝光相对光强，以满足植物生长对光质的不同需求。

Abstract:

In order to improve the proportion of red and blue light in visible light, flexibly match the different light quality requirements of plants, and enhance plant photosynthesis, this paper uses a high-temperature solid phase method suitable for industrial production to prepare Y2O3:Eu3+, BaMgAl10O17:Eu2+, CaSrAl2SiO7:Eu3+ conversion materials, and mixes them to prepare XT-SZ rare earth conversion materials. The XT-SZ conversion materials prepared in five ratios of 1:1:1, 2:1:1, 2:2:1, 4:2:1, and 6:4:1 maintained the phase structure of the main components and did not show any new diffraction peaks, indicating that the mixing process had no significant effect on the phase structure. Excitation and emission spectroscopy analysis showed that the XT-SZ conversion materials treated with the above five methods have similar luminescent properties, but their luminescent performance can be further improved by optimizing the composition ratio. The main emission peaks of the material are mainly located at about 450nm (blue region) and 620nm (red region). The relative intensity ratio of the red and blue light of the XT-SZ main emission peak is positively correlated with the Y2O3:Eu3+ ratio. When the ratios of Y2O3:Eu3+, CaSrAl2SiO7:Eu3+, and BaMgAl10O17:Eu2+ are 2:2:1 and 6:4:1, the relative intensity ratio of red and blue light increases significantly. On the basis of maintaining the original red and blue light of natural light unchanged, XT-SZ can simultaneously reduce harmful ultraviolet light and ineffective green light to plant growth, and convert both into red and blue light required for plant growth, improving the photosynthetic quantum flux density that can promote plant photosynthesis. By adjusting the ratio, XT-SZ can flexibly achieve the relative light intensity of red and blue light to meet the different needs of plant growth for light quality.