1. Preparation and Characteristics of CaNaMgVO:Sm Single-Phased White-Emitting Phosphors.
- Author
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Liang, Yujun, Liu, Mingyu, Yang, Fan, Wu, Xiaoyong, Yang, Wenlong, and Li, Xuejing
- Subjects
CHEMICAL sample preparation ,PHOSPHORS ,PHOTOLUMINESCENCE ,X-ray diffraction ,OPTICAL materials ,INORGANIC compounds ,WAVELENGTHS - Abstract
Novel single-phased phosphors CaNaMg-VO:xSm that exhibit efficient white-light photoluminescence properties have been successfully synthesized by the solid-state reaction method. The formation of a single CaNaMgVO phase has been confirmed by X-ray powder diffraction (XRD). The wavelength-tunable white light is realized by coupling of the broad emission band at 500 nm due to a V−O charge-transfer state transition and the sharp emission peaks at 564, 616, 650 and 708 nm assigned to G→H (J = 5/2, 7/2, 9/2, 11/2) transitions of the Sm ion. The luminescence color can be tuned from green to white by adjusting the doping concentration of Sm. When the doping concentration of Smis increased from x = 0 to x = 0.20, the color rendering index of the CaNaMgVO:xSm phosphors increased from 55 to 83. The present white phosphors show a great potential for white LEDs. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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