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  light conversion material  luminescence 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的需求，增强植物光合作用，本研究采用适合工业生产的高温固相法制备Y₂O₃:Eu³⁺、BaMgAl₁₀O₁₇:Eu²⁺、CaSrAl₂SiO₇:Eu³⁺稀土转光材料,将其混合制备成稀土转光材料XT-SZ，并分析不同配比XT-SZ的发光性能。结果发现，按质量比1∶1∶1、2∶1∶1、2∶2∶1、4∶2∶1、6∶4∶1这5种比例制备的XT-SZ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。激发光谱与发射光谱分析结果表明，上述5种比例制备的XT-SZ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其发光性能。该材料的主发射峰主要位于约450 nm(蓝光区)和620 nm(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⁺的配比分别为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:

To improve the ratio of red to blue light in visible light,flexibly match the needs of plants for different light quality,and enhance plant photosynthesis,this study used a high-temperature solid-phase method suitable for industrial production to prepare Y₂O₃:Eu³⁺,BaMgAl₁₀O₁₇:Eu²⁺,and CaSrAl₂SiO₇:Eu³⁺rare earth light conversion materials,which were then mixed in different ratios to prepare XT-SZ light conversion materials.The luminescence properties of XT-SZ with different ratios were analyzed.The results showed that XT-SZ light 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.The excitation and emission spectra indicated that the XT-SZ materials prepared with the above five ratios had similar luminescence properties,while their luminescence performance could be further improved by optimizing the composition ratio.The main emission peaks of the XT-SZ materials were mainly located at about 450 nm (blue region) and 620 nm (red region).The relative intensity ratio of red to blue light in the main emission peak of XT-SZ materials was positively correlated with the Y₂O₃:Eu³⁺ ratio.When Y₂O₃:Eu³⁺,CaSrAl₂SiO₇:Eu³⁺,and BaMgAl₁₀O₁₇:Eu²⁺ were mixed in the ratios of 2∶2∶1 and 6∶4∶1,respectively,the relative intensity ratio of red to blue light increased significantly.On the basis of maintaining the original red and blue light of natural light,XT-SZ rare earth light conversion materials could simultaneously reduce harmful ultraviolet light and ineffective green light for plant growth and convert them into the red and blue light required for plant growth,thus improving the photosynthetic quantum flux density that can promote plant photosynthesis.By adjustment of the ratio,the relative light intensity of red and blue light in XT-SZ can be flexibly achieved to meet the different needs of plant growth for light quality.