Synthesis and characterizations of Dy3+ doped Sr3Al2O6:Eu2+ powder phosphors through citric acid precursor |
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Authors: | Aoyang Yu Dong Zhang Yafei Hu Ruiqin Yang |
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Affiliation: | 1. Department of Forensic Science, People’s Public Security University of China, Beijing, 100038, China 2. Department of Trace Examination Technology, National Police University of China, Shenyang, 110035, China 3. Institute of Penology, The Central Institute for Correctional Police, Baoding, 071000, China 4. Criminal Science and Technology Institute of Jinan Public Security Bureau, Jinan, 250000, China
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Abstract: | Sr3Al2O6:Eu2+, Dy3+ phosphors were synthesized by the polymer precursor method. The X-ray powder diffraction patterns show that the samples have a cubic structure with a space group of Pa3. In the excitation spectrum, the phosphors show a wide absorption in the UV region from 250 to 450 nm, which corresponds to the crystal field splitting of the Eu2+ d-orbital. All the emission spectrum of Sr3Al2O6:Eu2+, Dy3+ phosphors show the broad band emission peaked at about 518 nm, which can be ascribed to the typical 4f65d1 → 4f7 transitions of Eu2+ ions. And the best dopant concentration of Dy3+ ions for Sr3Al2O6:2 mol%Eu2+, xDy3+ phosphors is 2 mol%. The excitation wavelengths have no influences on emission peaks, but have clear influences on emission intensities. |
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