Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 47, Issue 10, Pages 6210-6220Publisher
SPRINGER
DOI: 10.1007/s11664-018-6526-9
Keywords
Single-component phosphor; white light-emitting diodes; energy transfer; lifetime
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A series of Dy3+, Eu3+, and Tm3+-activated CaGd2(MoO4)(4) (CGM) ovoid-like microstructured phosphors have been successfully prepared using an ethylenediamine tetraacetic acid-assisted hydrothermal method at 200 degrees C for 24 h. The crystal structure, phase, morphology, composition, and luminescence properties of the phosphors were characterized by x-ray diffraction analysis, energy-dispersive spectrometry, field-emission scanning electron microscopy, photoluminescence (PL) spectroscopy, and lifetime measurements. Under ultraviolet excitation, the rare-earth-ion activated CGM phosphors exhibited characteristic PL properties. Efficient and strong energy transfer processes from Eu3+ to Dy3+ and from Tm3+ to Dy3+ were demonstrated. The CGM:Dy3+, Eu3+, Tm3+ phosphors exhibited strong color-tunable emission and warm white light, having great potential for application in white light-emitting diodes.
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