Preparation and Luminescence Properties of Composite Rare Earth Light Conversion Materials for Enhancing Plant Photo-synthesis
To improve the ratio of red to blue light in visible light,flexibly match the needs of plants for differ-ent 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 natu-ral 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.
万方数据
维普
