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Issue 17, 2013
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Design, synthesis and characterization of a novel yellow long-persistent phosphor: Ca2BO3Cl:Eu2+,Dy3+

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Abstract

A novel yellow emitting long-persistent phosphor Ca2BO3Cl:Eu2+,Dy3+ is developed. The incorporation of Dy3+ ions, which act as trap centers, largely extends the thermoluminescence characteristics and evidently enhances the persistent luminescence behavior of the phosphor. Both fluorescence and phosphorescence spectra of Ca2BO3Cl:Eu2+,Dy3+ reveal only one asymmetric broad emission band located at 580 nm, ascribed to the 5d–4f transitions of Eu2+ ions in two different sites. With the optimum doping concentration and sufficient excitation with UV light, the afterglow of samples can persist over 48 h above the recognizable intensity level (≥0.32 mcd m−2), a phenomenon that is infrequent and excellent. Furthermore, Ca2BO3Cl possesses an indirect bandgap of about 5.1 eV. Detailed processes and possible mechanism are studied and discussed.

Graphical abstract: Design, synthesis and characterization of a novel yellow long-persistent phosphor: Ca2BO3Cl:Eu2+,Dy3+

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Article information


Submitted
29 Jan 2013
Accepted
12 Mar 2013
First published
12 Mar 2013

J. Mater. Chem. C, 2013,1, 3004-3011
Article type
Paper

Design, synthesis and characterization of a novel yellow long-persistent phosphor: Ca2BO3Cl:Eu2+,Dy3+

W. Zeng, Y. Wang, S. Han, W. Chen, G. Li, Y. Wang and Y. Wen, J. Mater. Chem. C, 2013, 1, 3004
DOI: 10.1039/C3TC30182F

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