A series of Eu(3+)-, Ce(3+)-, Dy(3+)- and Tb(3+)-doped (Y,Gd)BO3 phosphors was synthesized by a solid-state diffusion method. X-Ray diffraction confirmed their hexagonal structure and the scanning electron microscopy results showed crystalline particles. The excitation spectra revealed that (Y,Gd)BO3 phosphors doped with Eu(3+), Ce(3+), Dy(3+) and Tb(3+) are effectively excited with near UV-light of 395 nm/blue light, 364, 351 and 314 nm, respectively. Photoluminescence spectra of Eu(3+)-, Ce(3+)- and Tb(3+)/Dy(3+)-doped phosphor showed intense emission of reddish orange, blue and white light, respectively. The phosphor Y0.60Gd0.38BO3:Ce0.02 showed CIE 1931 color coordinates of (0.158, 0.031) and better color purity compared with commercially available blue BAM:Eu(2+) phosphor. The phosphor (Y,Gd)BO3 doped with Eu(3+), Dy(3+) and Tb(3+) showed CIE 1931 color coordinates of (0.667, 0.332), (0.251, 0.299) and (0.333, 0.391) respectively. Significant photoluminescence characteristics of the prepared phosphors indicate that they might serve as potential candidates for blue chip and near-UV white light-emitting diode applications.
The photoluminescence analytical study of Ce3+ doped Ca14Al10Zn6O35 phosphors is done in this research work. Powder X-ray diffraction technique (XRD) along with scanning electron microscope i.e. (SEM), CIE colour coordinates including their PL properties with emission intensity effect too were analyzed for the characteristics of prepared phosphors. In the instance of Ca14Al10Zn6O35:Ce3+, the emission spectra demonstrates an exclusive 442 nm centered band corresponding to Ce3+’s 4f–5d transition. The result specifies that the Ce3+ activated Ca14Al10Zn6O35 phosphor could find out applications in the light phosphor production.
YAl3(BO3)4 doped with three rare earth (RE) ions namely Ce3 +, Dy3+ and Tb3+ were prepared by the conventional solid state diffusion method. The phosphors were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) techniques. PL spectra of Ce-doped samples showed the Ce3+ emission characteristic due to the 5d-4f transition. Dy-doped sample upon excitation at 351 nm, showed peaks corresponding to the 4F9/2→6H15/2 and 4F9/2→6H13/2 transitions. PL spectra of Tb-doped sample showed peaks corresponding to the 5D3→7FJ transition. Upon excitation at 364 nm, the enhanced luminescence observed in Ce3+ co-doped YAl3(BO3)4:Tb3+/Dy3+ phosphors is understood as due to energy transfer from Ce3+ to Tb3+/Dy3. The color purity has also been verified by using the chromaticity diagram.
Lexonomy is a platform which is an open source for writing and publishing dictionaries. Pali Lexicography is actually a dictionary created by using Lexonomy, which is a web based tool for creating dictionaries. Since a dictionary is a means of understanding any language and its translation, the present work is about Pali Lexicography. It is a project that has been created using simple XML tags and technical skills without any cost. In this, word mapping is done using selected words that are chosen from the set of Pali Language which are also present in the Marathi Language set having almost similar meaning in Marathi Language. All the Pali words have their English meaning which are automatically sorted generating the Lexicographic order. Pali dictionary is created with a simple user interface and is easily operable.
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