Photoluminescence and Afterglow Behavior of Eu2+, Dy3+ and Eu2+, Sm3+ in Sr3Al2O6 Matrix

Chao Xu; Dian Qing Lu

doi:10.4028/www.scientific.net/AMR.634-638.2493

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Photoluminescence and Afterglow Behavior of Eu2+,...

Photoluminescence and Afterglow Behavior of Eu²⁺, Dy³⁺ and Eu²⁺, Sm³⁺ in Sr₃Al₂O₆ Matrix

Abstract:

The long afterglow luminescent materials Sr₃Al₂O₆: Eu, Sm and Sr₃Al₂O₆: Eu, Dy (denoted as S1 and S2, respectively) were synthesized via solid-state reaction. X-ray diffraction, fluorescence spectrophotometer and thermal luminescent spectroscope were employed to characterize the phosphors. The excitation spectra are all well simulated by eight Gaussian curves, indicating that they originate from the 4f⁷(⁸S_7/2)–4f⁶5d(⁸H_J) transitions of Eu²⁺. The excitation spectra intensity of S1 is much stronger than that of S2, which indicates that there is a more efficient energy transfers from Sm³⁺ to Eu²⁺. The thermally stimulated luminescence (TSL) curve can be fitted to four TSL peaks and the low-temperature TSL peak is responsible for the long lasting phosphorescence. The proposed explanation for the afterglow property is discussed.

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Periodical:

Advanced Materials Research (Volumes 634-638)

Pages:

2493-2497

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.2493

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Online since:

January 2013

Authors:

Chao Xu, Dian Qing Lu

Keywords:

Electron Trap, Red Long Afterglow Material, Strontium Aluminate

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