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Photoluminescence properties of a novel rare-earth-free red-emitting Ca3Y(AlO)3(BO3)4:Mn4+ phosphor for white LEDs application

Photoluminescence properties of a novel rare-earth-free red-emitting Ca3Y(AlO)3(BO3)4:Mn4+... Novel red-emitting phosphors of Ca3Y(AlO)3(BO3)4 doped with different concentrations of Mn4+ were successfully synthesized by a high-temperature solid-state reaction method. Crystal composition, microstructure, and luminescence properties of samples were characterized by X-ray diffraction, scanning electron microscope, excitation and emission spectra, decay lifetimes and temperature-dependent photoluminescence spectra. The emission spectra exhibited a strong deep-red emission band in the wavelength range of 625–750 nm with a maximum at 678 nm. The optimal doping concentration of Mn4+ was about 0.1 mol%. Under 325 nm excitation, the CIE chromaticity coordinates of Ca3Y(AlO)3(BO3)4:0.1%Mn4+ sample were (0.704, 0.296). In addition, the concentration quenching mechanism was dominated by a dipole–dipole interaction for the Mn4+ activators. The value of the activation energy Ea was calculated to explain thermal quenching. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Materials Science: Materials in Electronics Springer Journals

Photoluminescence properties of a novel rare-earth-free red-emitting Ca3Y(AlO)3(BO3)4:Mn4+ phosphor for white LEDs application

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Springer Science+Business Media, LLC, part of Springer Nature
Subject
Materials Science; Optical and Electronic Materials; Characterization and Evaluation of Materials
ISSN
0957-4522
eISSN
1573-482X
DOI
10.1007/s10854-018-9417-1
Publisher site
See Article on Publisher Site

Abstract

Novel red-emitting phosphors of Ca3Y(AlO)3(BO3)4 doped with different concentrations of Mn4+ were successfully synthesized by a high-temperature solid-state reaction method. Crystal composition, microstructure, and luminescence properties of samples were characterized by X-ray diffraction, scanning electron microscope, excitation and emission spectra, decay lifetimes and temperature-dependent photoluminescence spectra. The emission spectra exhibited a strong deep-red emission band in the wavelength range of 625–750 nm with a maximum at 678 nm. The optimal doping concentration of Mn4+ was about 0.1 mol%. Under 325 nm excitation, the CIE chromaticity coordinates of Ca3Y(AlO)3(BO3)4:0.1%Mn4+ sample were (0.704, 0.296). In addition, the concentration quenching mechanism was dominated by a dipole–dipole interaction for the Mn4+ activators. The value of the activation energy Ea was calculated to explain thermal quenching.

Journal

Journal of Materials Science: Materials in Electronics – Springer Journals

Published: Jun 6, 2018

References