Luminescent Properties of Eu²⁺-Activated SrAl₂Si₂O₈ as an Potential Blue Phosphor for near UV LED Chips

Abstract:

The phosphors SrAl₂Si₂O₈ doped with different Eu²⁺ concentration were prepared by solid-state reaction technique, and their photoluminescent properties at different temperature were investigated. With the increase of Eu²⁺ content, two emission bands can be observed and this can be interpreted as Eu²⁺ ions occupying two types of sites in the crystal lattice. And their lifetime is decreasing, this result can be due to energy transfer among Eu²⁺ ions nonradiately at higher concentration of Eu²⁺ ions in the host lattices. The phosphor SrAl₂Si₂O₈:0.40Eu shares intense blue emitting with broad excitation in the near-UV range. This phosphor may be an excellent blue phosphor for near ultraviolet InGaN-based white diodes.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 956-960
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.956
• Online since: August 2013
• Authors: Li Jun Luo, Yi Wen Zhu, Ping Chen
• Keywords: 78.20.-e, 78.55.Hx, 78.55.-m, Low Temperature Spectra PACS, Photoluminescence (PL), White-Light-Emitting Diodes

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