Synthesis and Cathodoluminescent Properties of Y2O3: Eu3+ Phosphor with Micron-sized Controllable Particles

摘要:

荧光粉的发光性能对其形貌非常敏感，特别是荧光粉的尺寸。场发射显示器所需的荧光粉应是微米级的球状，然而可控的微米级荧光粉受到很少的关注。因此，本实验通过改进的共沉淀法制备合成了几微米的近球型红色Y2O3：Eu3+荧光粉。该产品在1050 ℃，pH值为5.5时，形貌均匀，粒径分布为0.9~3.1 μm，且发光亮度较商用的增加50%以上。结果表明，通过改良的共沉淀法可以制备出一种高质量的FED荧光粉。

Abstract:

The luminescent properties of phosphors are sensitive to their morphologies, particularly to the sizes of phosphor particles. The optimal morphology of the phosphor for the field emission display (FED) is the microsized sphere-like particles. However, less attention has been paid to the phosphors with micron-size controlled particles. In this paper, we reported an improved co-precipitation method to synthesize the red-emitting Y2O3:Eu3+ phosphor with the particle sizes controlled in several microns. The optimum phosphors were obtained at the calcination temperature of 1050 °C and pH=5.5, showing the sphere-like particles with the size distribution from 0.9 μm to 3.1 μm. Compared with the commercial phosphors, such optimum phosphors greatly enhance the cathodoluminescent properties and the corresponding luminescence intensity under the low excitation voltage of 1 kV is increased by 50%. Results indicate an effective way to develop the high-quality FED phosphors.