Sol-gel synthesis of Eu 3+ /Bi 3+ ions co-doped BaLa 2 WO 7 phosphors for red-LEDs under NUV excitation and FEDs applications

Hussain, Sk. Khaja; Yu, Jae Su

doi:10.1016/j.jlumin.2016.11.003

Cited by 54 publications

(4 citation statements)

References 43 publications

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“…The formed xerogels can later be sintered at higher temperatures of 500–1200 °C, depending on the desired material to form the phosphors. 43–46 CaMgSi 2 O 6 :Eu 2+ ,Mn 2+ ,Pr 3+ , 47 and Sr 2 ZnSi 2 O 7 :Eu 2+ ,Dy 3+ 48 are some of the lanthanide-activated long persistent phosphors that are synthesized via sol–gel synthesis. 49…”

Section: Modelsmentioning

confidence: 99%

Recent progress on lanthanide-based long persistent phosphors: an overview

Vaidyanathan

2023

J. Mater. Chem. C

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Section: Modelsmentioning

confidence: 99%

Recent progress on lanthanide-based long persistent phosphors: an overview

Vaidyanathan

2023

J. Mater. Chem. C

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“…Some carriers are stored in the defects, while others return to the excited level of Eu 2+ . This results in an increased number of carriers on the excited level and enhances the photoluminescence intensity [9] . Sensitization also plays an important role in improving photoluminescence intensity.…”

Section: Fluorescence Spectrum Analysismentioning

confidence: 99%

The Effect of Trivalent Ions on Luminescent Properties of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors

Guo,

Jiao,

Cao

et al. 2023

J. Phys.: Conf. Ser.

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Sr0.96Al2O4:Eu0.02, Dy0.02 green phosphors doped with La3+, Bi3+ and extra Dy3+ were successfully prepared by the solid-phase method. The crystal structure and luminescence properties of phosphors were characterized. The results showed that the doping of La3+ and Bi3+ and the continued increase of Dy3+ concentration in the SrAl2O4 lattice did not produce significant lattice distortion in the SrAl2O4 lattice, and the small amount of doping still maintained the presence of SrAl2O4. The photoluminescence intensity of both La3+ and Bi3+ doped samples showed an increasing and then decreasing trend within the doping amount, while the photoluminescence performance of Dy3+ doped samples did not show a decrease when increasing the same concentration of doping amount. The decay curves indicated that both La3+ and Bi3+ could decrease the afterglow time of SrAl2O4:Eu2+, Dy3+ phosphor, but increasing the concentration of Dy3+ effectively extends the afterglow time of SrAl2O4:Eu2+, Dy3+ phosphor.

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“…The sensitizer serves the function of energy donor, absorbing the radiation and cooperatively transferring it to the activator. It is well-known, for example, that Bi 3+ can act as a sensitizer to enhance lanthanide (Eu 3+ , Tb 3+ , Sm 3+ , and Dy 3+ ) emissions, through Bi 3+ → Ln 3+ energy transfer in different Ln-based hosts. − However, very few reports have been devoted to the Bi 3+ → Ln 3+ energy-transfer process in Bi 3+ ,Ln 3+ codoped fluorides. To the best of our knowledge, the only related fluoride system reported is YF 3 :Eu 3+ ,Bi 3+ although the analysis of the Bi 3+ → Eu 3+ energy-transfer process in the material does not seem to be correct because of the clear contamination of the nominally Eu 3+ free sample with Eu 3+ …”

Section: Introductionmentioning

confidence: 99%

Enhancing Luminescence and X-ray Absorption Capacity of Eu³⁺:LaF₃ Nanoparticles by Bi³⁺ Codoping

et al. 2019

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Bi3+ codoping has been proposed in this work with a twofold objective, namely, enhancing the luminescence emission of Eu3+:LaF3 nanoparticles (NPs) and increasing their X-ray attenuation capacity, with the purpose of obtaining a bimodal bioprobe for luminescence bioimaging and X-ray computed tomography. The synthesis method, reported here for the first time for LaF3 particles, allowed obtaining uniform, nonaggregated NPs using a homogeneous precipitation in polyol medium at room temperature in just 2 h. The simplicity of the synthesis method allows the large-scale production of NPs. LaF3 NPs with different Eu3+ contents were first synthesized to find the critical Eu3+ concentration, producing the highest emission intensity. This concentration was subsequently used to fabricate Bi3+–Eu3+-codoped LaF3 NPs using the same method. The emission intensity of the codoped NPs increased in more than one order of magnitude, thanks to the possibility of excitation through the Bi3+ → Eu3+ energy-transfer band. The luminescence properties of the codoped NPs were analyzed in detail to find the mechanism responsible for the emission enhancement. Finally, it was demonstrated that the high atomic number of Bi3+, higher than that of lanthanides, was an added value of the material because it increased its X-ray attenuation capacity. In summary, the LaF3 NPs codoped with Eu3+ and Bi3+ presented in this work are promising candidates as a bimodal bioprobe for luminescence bioimaging and X-ray computed tomography.

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Sol-gel synthesis of Eu 3+ /Bi 3+ ions co-doped BaLa 2 WO 7 phosphors for red-LEDs under NUV excitation and FEDs applications

Cited by 54 publications

References 43 publications

Recent progress on lanthanide-based long persistent phosphors: an overview

Recent progress on lanthanide-based long persistent phosphors: an overview

The Effect of Trivalent Ions on Luminescent Properties of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors

Enhancing Luminescence and X-ray Absorption Capacity of Eu³⁺:LaF₃ Nanoparticles by Bi³⁺ Codoping

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Sol-gel synthesis of Eu 3+ /Bi 3+ ions co-doped BaLa 2 WO 7 phosphors for red-LEDs under NUV excitation and FEDs applications

Cited by 54 publications

References 43 publications

Recent progress on lanthanide-based long persistent phosphors: an overview

Recent progress on lanthanide-based long persistent phosphors: an overview

The Effect of Trivalent Ions on Luminescent Properties of SrAl2O4:Eu2+, Dy3+ Phosphors

Enhancing Luminescence and X-ray Absorption Capacity of Eu3+:LaF3 Nanoparticles by Bi3+ Codoping

Contact Info

Product

Resources

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The Effect of Trivalent Ions on Luminescent Properties of SrAl₂O₄:Eu²⁺, Dy³⁺ Phosphors

Enhancing Luminescence and X-ray Absorption Capacity of Eu³⁺:LaF₃ Nanoparticles by Bi³⁺ Codoping