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Effects of Li+ Codoping on the Optical Properties of SrAl2O4 Long Afterglow Ceramic Phosphors


Affiliations
1 Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Korea, Republic of
2 Department of Nano Fusion Technology, Pusan National University, Busan 609-735, Korea, Republic of
 

Rare-earths codoped long afterglow strontium aluminate phosphors with high brightness were synthesized via a facile combustion synthesis method using urea as a fuel. The resulted phosphor particles were analyzed by using X-ray diffraction and field emission scanning electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The prepared SrAl2O4:Eu2+, Dy3+, Li+ samples showed a broad green-yellowish emission, peaking at 512 nm when excited by 348 nm. Compared to traditional SrAl2O4:Eu2+, Dy3+ phosphor, the initial luminescence brightness of SrAl2O4:Eu2+, Dy3+, codoped with Li+ improved from 1.89 cd/m2 to 2.71 cd/m2 and the afterglow decay time was prolonged from 103 to 121 min. The possible mechanism of SrAl2O4:Eu2+, Dy3+, Li+ phosphorescence enhancement has been discussed.
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  • Effects of Li+ Codoping on the Optical Properties of SrAl2O4 Long Afterglow Ceramic Phosphors

Abstract Views: 66  |  PDF Views: 2

Authors

Timur Sh. Atabaev
Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Korea, Republic of
Hong Ha Thi Vu
Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Korea, Republic of
Mac Kim
Department of Nano Fusion Technology, Pusan National University, Busan 609-735, Korea, Republic of
Yong Suk Yang
Department of Nano Fusion Technology, Pusan National University, Busan 609-735, Korea, Republic of
Hyung-Kook Kim
Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Korea, Republic of
Yoon-Hwae Hwang
Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Korea, Republic of

Abstract


Rare-earths codoped long afterglow strontium aluminate phosphors with high brightness were synthesized via a facile combustion synthesis method using urea as a fuel. The resulted phosphor particles were analyzed by using X-ray diffraction and field emission scanning electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The prepared SrAl2O4:Eu2+, Dy3+, Li+ samples showed a broad green-yellowish emission, peaking at 512 nm when excited by 348 nm. Compared to traditional SrAl2O4:Eu2+, Dy3+ phosphor, the initial luminescence brightness of SrAl2O4:Eu2+, Dy3+, codoped with Li+ improved from 1.89 cd/m2 to 2.71 cd/m2 and the afterglow decay time was prolonged from 103 to 121 min. The possible mechanism of SrAl2O4:Eu2+, Dy3+, Li+ phosphorescence enhancement has been discussed.