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Published in:
28-11-2016
Enhanced photoluminescence property of KLa1−xEux(MoO4)2 with concentration gradient
Published in: Journal of Materials Science: Materials in Electronics | Issue 6/2017
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Abstract
Octahedron-like KLa1−xEux(MoO4)2 were successfully synthesized by a molten salt sintering method using KCl as flux. The as-prepared products were characterized by X-ray powder diffractometry, scanning electron microscope, high resolution transmission electron microscopy (HRTEM), selected-area electron diffraction and photoluminescence spectrometry. The results show the impact on the morphology is not affected by doping Eu3+. The results of SEAD, HRTEM and EDS shows the microstructure feature of the sample which showed the existence of concentration gradient of Eu3+ in this sample. The emission spectra recorded for an excitation wavelength at 394 nm exhibit a strong emission peak at 616 nm, corresponding to the 5D0→7F2 transition of Eu3+. The commission international Del’Eclairage chromaticity coordinates of the phosphors were about (0.6637, 0.3360) and it is very close to the standard red chromaticity of NTSC. Therefore, the phosphors could be promising for white light-emitting diodes.