Luminescence of SrAl₂O₄:Eu²⁺, Dy³⁺ Ceramics Synthesized at Different Firing Condition

Abstract:

The green SrAl₂O₄:Eu²⁺, Dy³⁺ phosphor is a well-known persistent material for a wide region of applications such as lighting, traffic signs, interior decoration and medical application. Double activated SrAl₂O₄:Eu²⁺, Dy³⁺ with improved properties has been synthesized through solid state route at different firing atmospheres (reduction, vacuum, oxygen and CO₂ wet gas) and heating times (1 h to 8 h). At the beginning the powders were heat treated for 2 h with a heating rate of 10°C/min. The phosphor prepared at different firing atmospheres and heating times exhibited a different wavelength and intensity of PL spectra. The emission intensity becomes stronger as the heating times increases from 1 h to 4 h. The difference found from these spectra maxima is rationalized based on the presence of intermediate phases and also on the diffusion activities of activator and co-activator in the host matrices.

• Periodical: Advanced Materials Research (Volume 620)
• Pages: 284-288
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.620.284
• Online since: December 2012
• Authors: A. Nor Nazida, M.N Ahmad Fauzi, M. Nazarov, A. Azizan, K. Shah Rizal
• Keywords: Atmosphere, Emission, Excitation Spectra, Temperature

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