| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5399770 | Journal of Luminescence | 2014 | 5 Pages |
Abstract
A series of Dy3+ doped Ca19Mg2(PO4)14 phosphors were firstly synthesized by the solid-state reaction method. The phase purity and characteristic luminescent properties are investigated in detail by X-ray diffraction refinement, photoluminescence spectra and decay times measurement. Under 365 nm excitation, Ca19Mg2(PO4)14:Dy3+ phosphor can exhibit intense warm white emission with CIE chromaticity coordinates (0.400, 0.452) and low correlated color temperature (3994 K). The optimal doping contents of Dy3+ in Ca19Mg2(PO4)14 is determined to be 2%. The thermal quenching property of Ca19Mg2(PO4)14:Dy3+ is also investigated and it remains 60% of the initial emission intensity even when the temperature increases to 230 °C. The results show that Ca19Mg2(PO4)14:Dy3+ can be a promising single phased white emitting phosphor for UV white LEDs.
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Authors
Ge Zhu, Yuhua Wang, Qian Wang, Xin Ding, Wanying Geng, Yurong Shi,