White light emission and energy transfer of LaMgAl 11 O 19 :Eu 3+ , Tb 3+ phosphors

White light emission and energy transfer of LaMgAl 11 O 19 :Eu 3+ , Tb 3+ phosphors

White-light-tunable LaMgAl O :x%Tb , y%Eu series phosphors were prepared using the gel-combustion method. The structure and luminescence properties were studied, and the energy transfer of Eu and Tb in the LaMgAl O system was also discussed. The results showed that the LaMgAl O matrix exhibited stro...

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Veröffentlicht in:Luminescence (Chichester, England) England), 2023-06, Vol.38 (6), p.736-743
Hauptverfasser: Li, Tingting, Pang, Jiali, Xue, Chaolumen, Sha, Ren
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creator Li, Tingting
Pang, Jiali
Xue, Chaolumen
Sha, Ren
description White-light-tunable LaMgAl O :x%Tb , y%Eu series phosphors were prepared using the gel-combustion method. The structure and luminescence properties were studied, and the energy transfer of Eu and Tb in the LaMgAl O system was also discussed. The results showed that the LaMgAl O matrix exhibited strong emission in the blue-light region under the excitation of ultraviolet light, which resulted in conditions suitable for the preparation of white-light-tunable phosphors. The emission spectra of LaMgAl O :2%Tb , y%Eu (y = 2%-9%) series phosphors were obtained through optimization experiments. It could be seen from the CIE diagram that by adjusting the doping quantities of Eu and Tb in the LaMgAl O host, multicolor luminescence and white light emission in a single host could be achieved. By calculating the energy transfer efficiency and critical distance between Eu and Tb series phosphors, the mechanism of energy transfer between Tb and Eu was found to be the interaction between electric quadruples.
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The structure and luminescence properties were studied, and the energy transfer of Eu and Tb in the LaMgAl O system was also discussed. The results showed that the LaMgAl O matrix exhibited strong emission in the blue-light region under the excitation of ultraviolet light, which resulted in conditions suitable for the preparation of white-light-tunable phosphors. The emission spectra of LaMgAl O :2%Tb , y%Eu (y = 2%-9%) series phosphors were obtained through optimization experiments. It could be seen from the CIE diagram that by adjusting the doping quantities of Eu and Tb in the LaMgAl O host, multicolor luminescence and white light emission in a single host could be achieved. 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title White light emission and energy transfer of LaMgAl 11 O 19 :Eu 3+ , Tb 3+ phosphors
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