| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10653782 | Solid State Communications | 2005 | 4 Pages |
Abstract
The luminescent properties of alkaline earth orthosilicates M2SiO4 (M=Ba, Sr, Ca) doped with Eu2+ ions are investigated. Two emission bands are assigned to the f-d transitions of Eu2+ ions doped into two different cation sites in host lattices confirmed by electron paramagnetic resonance signal. Two emission bands show the different emission color variation with substituting M2+ cations with smaller cations. This behavior is discussed in terms of two competing factors of the crystal field strength and covalence. Also the decay times are in order of 600-1000Â ns. These phosphors with maximum excitation of around 370Â nm can be applied as a color-tunable phosphor for light-emitting diode based on ultraviolet chip/phosphor technology.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
J.S. Kim, P.E. Jeon, J.C. Choi, H.L. Park,