| Synthesis and Optoelectronic Characterization of Silicate
Lattice-Based M3La2Si3O12 (M = Mg2+, Ca2+, Sr2+ and Ba2+)
Nanophosphors for Display Applications |
Suman Sheoran,a Sitender Singh,a Vijeta Tanwar,a Ajay Mann,b Vachan Singh,a Bernabe Maric
and Devender Singha,*
Pages : 35-42
DOI : 10.1080/0371750X.2020.1712259 |
| Abstract |
| Eu3+ doped M3La2Si3O12 (M = Mg2+, Ca2+, Sr2+, Ba2+) materials were prepared using sol-gel
technique. The samples were prepared at a temperature of 950oC using 0.01-0.05
mole of Eu3+ ion to examine worth of amount of activator ion on luminous intensity.
Photoluminescence characteristics of these Eu3+ incorporated inorganic fluorescent
materials were explored using photoluminescence (PL) emission spectroscopy for
display devices. These phosphor materials showed stable colour coordinates and
their luminescence intensity enhanced with temperature. Upon 393 nm excitation, Eu(III)
incorporated fluorescent materials exhibited intense red emission with high colour
purity including three peaks at 589, 613-615 (dominant) and 650-655 nm corresponding
to 5D0ï‚®7F1-3 transition. The structural parameters were determined using powder X-ray
diffraction (PXRD) and transmission electron microscopy (TEM) techniques. The
presence of sharp and intense peaks in the diffraction patterns confirmed high
crystalline nature of the prepared materials that improved with increasing temperature.
TEM images showed spherical particles with 13-36 nm size. Fourier transform infrared
study was employed to determine the stretching frequencies of silicate groups and
metal available in the prepared materials. The strong PL response and high chemical
stability of Eu3+ doped M3La2Si3O12 phosphors made them suitable materials for
applications in the full-colour displays and white light emitting diodes (WLEDs).
[Keywords: Optoelectronic material, M3La2Si3O12:Eu3+, Sol-gel, X-ray diffraction,
Micrographs, Displays] |
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