Journal
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
Volume 8, Issue 4, Pages 752-758Publisher
WILEY
DOI: 10.1111/j.1744-7402.2010.02542.x
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Funding
- National Natural Science Foundation of China [50902050]
- Innovative Foundation of East China Normal University [78210002]
- Special Project for Nanotechnology of Shanghai [0952nm02200]
- Program of Shanghai Subject Chief Scientist [08XD1421000]
- Special Project for Solid-State Lighting Engineering and Optoelectronics of Shanghai [08DZ1140102, 09DZ1141900]
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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.
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