Eu₂O₃ microsphere luminescent material based on aerosol jet printing

Department of Energy and Environment, Southeast University, Nanjing, Jiangsu 210096, China

^a* 1574466764@qq.com

Abstract

In this paper, microsphere structural materials of europium oxide (Eu2O3) were prepared using the aerosol jet printing technique. Europium oxide powders were produced at different calcination temperatures for the comparisons of nanostructures and luminescence properties. The peak of the emission spectrum of Eu³⁺ is near 612 nm (red), which contributes to the three primary colors. As an important and typical rare earth oxide, Eu₂O₃ plays an important role in red phosphor materials and is an activator for the red phosphor. Rare earth oxides microsphere materials are widely used in modern industrial production, such as light, electricity, magnetism, mechanics, and machinery, because of their advantages of the small size effect and the surface effect. Eu₂O₃ microsphere nanomaterials possess the advantages of both rare earth oxides and microsphere materials, exhibiting excellent optical properties and laying a good foundation for the development of biomedical, electronic information photocatalysis and other industries. However, the existing preparation methods of Eu₂O₃ microsphere nanomaterials have shortcomings, including uncontrollable microparticle morphology and complicated experimental operations. The most important point is that the initial pattern of the phosphor cannot be customized, and a secondary process is needed to obtain the target pattern. This two-step process inevitably leads to the loss of material and production time. Under this background, this experiment attempts to prepare a microspherical Eu₂O₃ phosphor using aerosol jet printing (AJP) technology, which is an important attempt to improve the level of the luminescent performance and the customization level of the fluorescent initial pattern.