Synthesis and photoluminescence properties of new NaAlSiO4:Eu2+ phosphors for near-UV white LED applications

Jo, Deok Su; Luo, Yuanyuan; Senthil, Kalaiselvi; Toda, Kenji; Kim, Bong-Sung; Takeuchi, Masaki; Yoon, Dae Ho

doi:10.1016/j.optmat.2011.10.004

Cited by 42 publications

(19 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Particularly the band at approximately 550 nm in S1_700 could be associated with Eu 2+ ions in the NaAlSiO4 phase as studies of polycrystalline samples have shown similar results. [48,49] Luminescence band with maximum in the near UV region, which dominates the PL spectrum of the S1_800 sample must be due to additional sodalite-like crystalline phase present in the material as suggested from the XRD results. In the S2 composition a change in Eu 2+ luminescence is observed only after heat treatment at 700 °C and above.…”

Section: Pl Studiesmentioning

confidence: 86%

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

et al. 2017

View full text Add to dashboard Cite

Different compositions of europium doped aluminosilicate oxyfluoride glass ceramics prepared in air atmosphere have been studied by electron paramagnetic resonance (EPR) and optical spectroscopy methods. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements show presence of homogenously distributed SrF2 nanocrystals after the heat treatment of the precursor glass. Efficient Eu 3+ incorporation in the high symmetry environment of glass ceramics is observed from the photoluminescence spectra. EPR spectra indicate Eu 3+ → Eu 2+ reduction upon precipitation of crystalline phases in the glass matrix. For composition abundant with Eu 2+ in the glassy state such behaviour is not detected. Local structure around europium ions is discussed based on differences in chemical compositions.

show abstract

Section: Pl Studiesmentioning

confidence: 86%

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

et al. 2017

View full text Add to dashboard Cite

show abstract

“…White light emitting diodes (LEDs) show promising potential to replace the conventional incandescent and fluorescent lamps on account of attractive features like high luminous efficiency, long life time, small volume, energy saving, reliability, and environment friendly characteristic being mercury free [1][2][3]. The most commonly and extensively studied system to produce white light is the combination of InGaN-based blue chip with a yellow phosphor (e.g., YAG:Ce 3+ ) [4].…”

Section: Introductionmentioning

confidence: 99%

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

Bagga

Achanta

Goel³

et al. 2013

Materials Science and Engineering: B

View full text Add to dashboard Cite

“…Among manifold multi‐color luminescent materials, the aluminosilicates have been extensively studied as the satisfactory host lattices for phosphors owing to their outstanding thermal, chemical, mechanical stability and structural diversity. Among the aluminosilicates, the nepheline NaAlSiO 4 (NAS) is of practical interest as efficient host materials for the luminescence of various rare earth ions because of their high crystal field and excellent thermal and chemical properties, which has been determined and applied in the long persistent luminescence and optical material, for example, NaAlSiO 4 :Eu 2+ , NaAlSiO 4 :Dy 3+ , NaAlSiO 4 :Tb 3+ , Bi 3+ , and NaAlSiO 4 :Ce 3+ , Mn 2+ . However, to the best of our knowledge, there is no report to focus on the luminescent properties and energy transfer of co‐doped Bi 3+ and Eu 3+ ions in the host of NAS.…”

Section: Introductionmentioning

confidence: 99%

New single‐component multicolor emission Na_1−xAl_1+2xSi_1−2xO4:xBi³⁺/Eu³⁺ phosphors via energy transfer

Song

et al. 2018

J Am Ceram Soc

View full text Add to dashboard Cite

A series of emission‐tunable Na1−xAl1+2xSi1−2xO4:xBi3+/Eu3+ phosphors were synthesized via high temperature solid‐state reaction method. The luminescence properties, energy transfer from Bi3+ to Eu3+ ions, color tuning, thermal stability and quantum efficiency were systematically investigated. Especially, in the host, a certain amount of Si4+ were replaced by Al3+ in order to remedy the charge compensating defect, so that, the emission intensity had been improved. The results of Rietveld refinements, the analysis of SEM mapping and the fourier transform infrared (FT‐IR) indicated that this charge balance strategy was an effective method. Meanwhile, the energy transfer from Bi3+ to Eu3+ can be inferred and confirmed and the mechanisms were demonstrated to quadrupole–quadrupole interaction. The emission hue can be tuned from blue to pink, and finally to orange red light by properly varying the ratio of Bi3+ and Eu3+. Importantly, when the temperature was raised to 150°C, the integrated emission intensity was 71.20% of the initial value for NAS:1%Bi3+,2%Eu3+ samples indicating that these phosphors had excellent thermal stability and stable color (no emission shift). All these properties indicate that the developed phosphors may be potentially used as single‐component color‐tunable‐emitting phosphors for UV light‐emitting diodes.

show abstract

Synthesis and photoluminescence properties of new NaAlSiO4:Eu2+ phosphors for near-UV white LED applications

Cited by 42 publications

References 25 publications

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

New single‐component multicolor emission Na_1−xAl_1+2xSi_1−2xO4:xBi³⁺/Eu³⁺ phosphors via energy transfer

Contact Info

Product

Resources

About

Synthesis and photoluminescence properties of new NaAlSiO4:Eu2+ phosphors for near-UV white LED applications

Cited by 42 publications

References 25 publications

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

Electron paramagnetic resonance and photoluminescence investigation of europium local structure in oxyfluoride glass ceramics containing SrF2 nanocrystals

Dy3+-doped nano-glass ceramics comprising NaAlSiO4 and NaY9Si6O26 nanocrystals for white light generation

New single‐component multicolor emission Na1−xAl1+2xSi1−2xO4:xBi3+/Eu3+ phosphors via energy transfer

Contact Info

Product

Resources

About

New single‐component multicolor emission Na_1−xAl_1+2xSi_1−2xO4:xBi³⁺/Eu³⁺ phosphors via energy transfer