Color tunable emission and energy transfer of Ce3+/Dy3+ codoped Ba3La2(BO3)4 phosphor for UV white LEDs

Color tunable emission and energy transfer of Ce3+/Dy3+ codoped Ba3La2(BO3)4 phosphor for UV... Polycrystalline Ba3La2(BO3)4:Ce3+,Dy3+ sub-micrometer-sized phosphors were synthesized by solid-state reaction under a weak reductive atmosphere. The structure, static and time-resolved photoluminescence are investigated. Under the near-ultraviolet excitation, the Ba3La2(BO3)4:Dy3+ phosphors emit white light with three intense emission bands centered at 483, 575, and 665 nm. The efficient energy transfer from Ce3+ to Dy3+ in Ba3La2(BO3)4 phosphor was found by excitation/emission spectra and decay time measurements, and the resonant type was demonstrated by a dipole-dipole mechanism. A tunable emission hue from blue (0.18, 0.20) to blue-white (0.26, 0.29) and eventually to white (0.32, 0.33) was obtained in Ba3La2(BO3)4:Ce3+,Dy3+ phosphors. Owing to the broad UV excitation band, indicating that Ba3La2(BO3)4:Ce3+,Dy3+ phosphors can be considered as a potential candidate for ultraviolet-based white light-emitting diodes. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Elsevier

Color tunable emission and energy transfer of Ce3+/Dy3+ codoped Ba3La2(BO3)4 phosphor for UV white LEDs

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Publisher
Elsevier
Copyright
Copyright © 2018 Elsevier B.V.
ISSN
1386-1425
D.O.I.
10.1016/j.saa.2018.05.061
Publisher site
See Article on Publisher Site

Abstract

Polycrystalline Ba3La2(BO3)4:Ce3+,Dy3+ sub-micrometer-sized phosphors were synthesized by solid-state reaction under a weak reductive atmosphere. The structure, static and time-resolved photoluminescence are investigated. Under the near-ultraviolet excitation, the Ba3La2(BO3)4:Dy3+ phosphors emit white light with three intense emission bands centered at 483, 575, and 665 nm. The efficient energy transfer from Ce3+ to Dy3+ in Ba3La2(BO3)4 phosphor was found by excitation/emission spectra and decay time measurements, and the resonant type was demonstrated by a dipole-dipole mechanism. A tunable emission hue from blue (0.18, 0.20) to blue-white (0.26, 0.29) and eventually to white (0.32, 0.33) was obtained in Ba3La2(BO3)4:Ce3+,Dy3+ phosphors. Owing to the broad UV excitation band, indicating that Ba3La2(BO3)4:Ce3+,Dy3+ phosphors can be considered as a potential candidate for ultraviolet-based white light-emitting diodes.

Journal

Spectrochimica Acta Part A: Molecular and Biomolecular SpectroscopyElsevier

Published: Sep 5, 2018

References

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