The Enhanced Low‐Voltage Cathodoluminescent Properties of Spherical Y2O3:Eu3+ Phosphors Coated with In2O3 and its Application to Field‐Emission Displays
The Enhanced Low‐Voltage Cathodoluminescent Properties of Spherical Y2O3:Eu3+ Phosphors Coated with In2O3 and its Application to Field‐Emission Displays
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DOI：
10.1111/j.1744-7402.2010.02542.x
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发表时间：
2011-07
影响因子：
2.1
通讯作者：
Mingchang Zhang;Xiaojun Wang;H. Ding;Huili Li;L. Pan;Zhuo Sun
中科院分区：
文献类型：
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作者：
Mingchang Zhang;Xiaojun Wang;H. Ding;Huili Li;L. Pan;Zhuo Sun
采用尿素均匀沉淀法制备了分散均匀的球形Y2 O3：Eu 3+红色荧光粉。成功地将In 2 O3纳米粒子包覆在荧光粉表面。研究了包覆In 2 O3前后Y2 O3：Eu 3+荧光粉的物相组成、形貌、光致发光（PL）和阴极发光（CL）特性。结果发现，CL性能，如发光效率，寿命和稳定性的In 2 O3涂层荧光屏显着提高，即使其PL强度相比，未涂覆的样品下降。其原因是导电性的提高和电荷积累效应的降低。结果表明，在Y_2O_3：Eu ~（3+）荧光粉表面包覆适量的In_2O_3更适合低压场发射显示器的要求。
Dispersed and spherical Y2O3:Eu3+ red phosphor particles were prepared by the urea homogeneous precipitation method. In2O3 nanoparticles were successfully coated on the surface of the phosphor. Phase compositions, morphologies, photoluminescence (PL) spectra, and cathodoluminescence (CL) properties of Y2O3:Eu3+ phosphors before and after In2O3 coating were examined. It was found that CL properties such as luminous efficiency, lifetime, and stability of In2O3-coated phosphor screen were improved significantly, even though its PL intensity decreased compared with that of the uncoated sample. The reason is attributed to the increase of the electrical conductivity and the decrease of the charge accumulating effect. The present results prove that Y2O3:Eu3+ phosphor coated with an appropriate amount of In2O3 is more suitable to the requirement for low-voltage field-emission displays.