Issue 74, 2015

Energy transfer and luminescent properties of Ca8MgLu(PO4)7:Tb3+/Eu3+ as a green-to-red color tunable phosphor under NUV excitation

Abstract

Two series of single-composition Ca8MgLu(PO4)7:Tb3+ and Ca8MgTb(PO4)7:Eu3+ phosphors were prepared by a high-temperature solid-state reaction technique, and their phase structures were characterized by powder X-ray diffraction (XRD). The excitation and emission spectra, and fluorescence decays were measured and discussed in detail. The results reveal that Tb3+ can efficiently transfer excitation energy to Eu3+ via its 4f states and therefore sensitizes Eu3+ emission under NUV excitation. By adjusting the ratio of Eu3+ and Tb3+, we can tune the emission color of Ca8MgTb(PO4)7:Eu3+ from green to yellow, orange and pure red. For Ca8MgTb0.1(PO4)7:0.9Eu3+, the emission intensity at 150 °C is 87.44% of that at 25 °C, which makes it be a potential pure red phosphor for NUV LEDs.

Graphical abstract: Energy transfer and luminescent properties of Ca8MgLu(PO4)7:Tb3+/Eu3+ as a green-to-red color tunable phosphor under NUV excitation

Supplementary files

Article information

Article type
Paper
Submitted
10 May 2015
Accepted
03 Jul 2015
First published
03 Jul 2015

RSC Adv., 2015,5, 59830-59836

Energy transfer and luminescent properties of Ca8MgLu(PO4)7:Tb3+/Eu3+ as a green-to-red color tunable phosphor under NUV excitation

F. Xie, J. Li, Z. Dong, D. Wen, J. Shi, J. Yan and M. Wu, RSC Adv., 2015, 5, 59830 DOI: 10.1039/C5RA08680A

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