Effect of Al/Sr Ratio on Properties of Strontium Aluminate Long Lasting Phosphor

doi:10.3724/SP.J.1077.2009.00053

Abstract

Abstract: The relation between properties of strontium aluminate phosphor and Al/Sr ratio was investigated. A series of strontium aluminate phosphors with different Al/Sr ratios from 1.0 to 12.0 were synthesized by solid-state method. The samples were characterized by X-ray diffraction and photoluminescence spectra. The results reveal that single phases of SrAl₂O₄:Eu²⁺,Dy³⁺, Sr₄Al₁₄O₂₅:Eu²⁺,Dy³⁺ and SrAl₁₂O₁₉:Eu²⁺,Dy³⁺ are obtained with Al/Sr ratios of 2.0, 3.5 and 10.0 respectively. When Al/Sr selects other values, the final products are mixture. Moreover, the emission spectra of the samples shift to blue-ultraviolet short wavelength from yellow-green long wave with the increase of Al/Sr ratios, which result from change of products’ composition.

Key words: aluminate, long afterglow, Al/Sr

CLC Number:

O482

LUAN Lin,GUO Chong-Feng,HUANG De-Xiu. Effect of Al/Sr Ratio on Properties of Strontium Aluminate Long Lasting Phosphor[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2009.00053.

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Effect of Al/Sr Ratio on Properties of Strontium Aluminate Long Lasting Phosphor

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