The Characteristics of High-Temperature Synthesized YAG:Ce Nano-Phosphors

Abstract:

In the last decade, nanosized phosphors had attracted a lot of interest, no matter in light emitting layers or thermal remove materials. Many methods had been investigated to synthesize nanosized phosphors, but they usually need expensive cost and complicated procedures, furthermore they resulted in the difficulties in mass production. In our work, chemical co-precipitation was applied to prepare YAG:Ce precursor. Then, the mixed precipitation was heated to 900°C with air in the furnace. After 1 hour, the synthesis was completed. From TEM images, the average particle size is about 40 nm and all XRD diffraction peaks of phosphor powders were consistent to JCPDS data of YAG. Photoluminescence spectra show the nanosized YAG:Ce phosphor synthesized at 1000°C possessed the strongest photoluminescence intensity at wavelength 540 nm. From photoluminescence excitation spectra, the strongest absorption peak was observed at wavelength 460 nm in all samples. At synthesis temperature 1000°C, YAG with 0.5% Ce³⁺ was observed to emit the strongest yellow light. It is believed our synthesis can provide an easy and low-cost choice to synthesize YAG:Ce nanophosphors at high temperature.

• Periodical: Applied Mechanics and Materials (Volume 145)
• Pages: 194-198
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.145.194
• Online since: December 2011
• Authors: Hao Ying Lu, Hua Wei Yang
• Keywords: High-Temperature Synthesis, Nanophosphors, YAG

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