Potential red phosphor for UV-white LED device
2006; Elsevier BV; Volume: 122-123; Linguagem: Inglês
10.1016/j.jlumin.2006.01.339
ISSN1872-7883
Autores Tópico(s)Glass properties and applications
ResumoPotassium-europium double tungstate and molybdate, KEu(WO4)2−x(MoO4)x, has been synthesized by solid state reactions. As the molybdate content increased, the intensity of the 5D0→7F2 emission of Eu3+, activated by irradiation at 396 nm, increased and reached a maximum at a mole ratio of molybdenum to tungsten of 3. These changes were accompanied by changes in the shape of the spectra, which is associated with the crystal field splitting of the 5D0→7F2 transition. As the molybdenum content increased, the emission intensity at 615 nm increased and that at 620 nm decreased. This indicates the formation of a new crystal structure, rather than solid solution formation. In this study, the effects of flux, concentration of molybdate, and resulting crystal structure on the PL properties was discussed.
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