Er3+ doped Ba2GdV3O11: Synthesis and characterization for crystal and photoluminescent features of bright green emitting nanophosphor

Abstract

The synthesis of a green glowing series of Ba2Gd(1-x)ErxV3O11 (x = 0.01–0.05) has been accomplished through a simple route of solution combustion aided with urea. The X-ray fed diffraction leads to particular patterns for samples of a distinct phase prototype and hence, helps in establishing a similarity among erbium doped structures with that of the parent host. The electron microscopy of transmitting (TEM) and scanning (SEM) nature distinguish the dimension and surface related features of the synthesized nanophosphor, respectively. The even possession of different initial elements by the sample, is supported by energy dispersive spectroscopy (EDS) oriented mapping technique. The band gap for Ba2Gd0.98Er0.02V3O11 has been estimated to be 3.60 eV. The 1A1 → 1T1,2 transition lead by 345 nm of wavelength causes green luminescence in Er3+ doped Ba2GdV3O11 nanophosphors due to 3T2,1 → 1A1 (494 nm), 2H11/2 → 4I15/2 (527 nm) and 4S3/2 → 4I15/2 (556 nm) transition. The quenching of luminescence post 2 mol% concentration of Er3+ is accredited to dipole-dipole contact as per Dexter's theory. The intrinsic lifetime (8.823 ms), average lifetime (4.479 ms), non-radiative rates (109.891 s−1) along with quantum efficiency (51%), CIE x (= 0.1953), y (= 0.3320) coordinates present Ba2Gd0.98Er0.02V3O11 as a capable green emitting nanophosphor for RGB phosphors in lighting technology.