A novel red light-emitting phosphors of Li3Ba 2Ln,3-xEux(MoO4)8 were synthesized by sol-gel method. According to X-ray diffraction, the materials belongs to monoclinic system. The structure and luminescent properties of these phosphors were investigated by emission and excitation spectra in details. The main emission peak of the samples is at 616 nm. Effect of the dosage of eitrie acid and polyethylene glycol and the aetivator concentration on the crystal structure, morphology and luminescent properties were investigated by using XRD, SEM. These results showed that this phosphor can be effectively excited by ultraviolet (UV) (395 nm) and blue (465 nm) light, matching the output wavelengths of ultraviolet or blue LED chips. Integrated emission intensity of Li3Ba2Y2. 8Eu0. 2(MoO 4)8 is the strongest in the series of the Li 3Ba2Ln3-xEux(MoO4) 8(Ln = La, Gd, Y) phosphors. The Li3Ba2Zn 3-nEux(MoO4)8(Ln = La, Gd, Y) phosphors might be a better candidate for solid state lighting application.
|Number of pages||7|
|Journal||Chinese Journal of Luminescence|
|Publication status||Published - Oct 2009|
- Red phosphor