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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ma, Hengxin Liu, Qingbo Li, Xu Jin, Cheng Liu, Pengfei |
| Description | Country affiliation: China Author Affiliation: jin C ( Department of Physics and Electronic Engineering, Baoding University, Baoding 071002, China.); Ma H ( College of Science, Agricultural University of Hebei, Baoding 071002, China.); Liu Q ( Department of Physics and Electronic Engineering, Baoding University, Baoding 071002, China. Electronic address: bdxylqb@163.com.); Li X ( College of Physics Science and Technology, Hebei University, Baoding 071002, China.); Liu P ( College of Physics Science and Technology, Hebei University, Baoding 071002, China.) |
| Abstract | A series of red-emitting phosphors Eu(3+)-doped KNaCa2(PO4)2 were synthesized by solid-state reaction, and the photoluminescence (PL) properties were also investigated. The excitation spectrum is composed of charge-transfer (CT) of Eu-O and excitation lines of Eu(3+) ions. The strongest excitation lines appeared at 393 nm. The emission spectra of KNaCa2(PO4)2:Eu(3+) phosphors exhibit five peaks assigned to the (5)D0-(7)FJ (J=0, 1, 2, 3, 4) transitions of Eu(3+) and have dominating emission peak at 621 nm under 393 nm excitation. The luminescence intensity enhanced with increasing Eu(3+) content and the emission reached the maximum intensity at x=0.02 in KNaCa2-x(PO4)2:xEu(3+). The effect of the charge compensators on the emission intensity of the phosphors was investigated. The integral intensity of the emission spectrum of KNaCa1.96(PO4)2:0.02Eu(3+), 0.02Na(+) excited at 393 nm is about 2.4 times as strong as that of Y2O3:0.05Eu(3+) commercial red phosphor. The color coordinates for KNaCa1.96(PO4)2:0.02Eu(3+),0.02Na(+) were measured. The results indicate that KNaCa2(PO4)2:Eu(3+) might be a promising phosphor for w-LEDs. |
| ISSN | 13861425 |
| Volume Number | 122 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-03-25 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Calcium Phosphates Chemistry Europium Luminescent Agents Cations Luminescence Luminescent Measurements Potassium Sodium Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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