Synthesis and luminescent properties of Tb3+ doped BaLa2ZnO5 nanoparticles

Journal Article · Thu Mar 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2017.11.005· OSTI ID:22805437

Dahiya, Heena ^[1]; Dalal, Mandeep; Dalal, Jyoti; Taxak, V. B.; Khatkar, S. P. ^[2]; Kumar, Dinesh ^[1]

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1. Department of Chemistry, Deenbandhu Chhotu Ram University of Science & Technology, Murthal, Sonepat, 131039 (India)
2. Department of Chemistry, Maharshi Dayanand University, Rohtak, 124001 (India)

Highlights: • First combustion-synthesis report of BaLa{sub 2-x}ZnO{sub 5}:xTb{sup 3+} nanophosphors. • Lattice parameters and atomic positions have been refined. • Critical distance for non-radiative energy transfer has been calculated. • These nanophosphors are suitable candidate for solid state lighting. • Some blue to green color tunability has been found. - Abstract: Nanophosphor powders of composition BaLa{sub 2}ZnO{sub 5}:Tb{sup 3+} have been synthesized via using urea assisted solution combustion method using metal nitrates as the precursor materials. The structural, morphological and luminescent properties have been investigated by powder X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy. The Rietveld analysis showed that these nanophosphors crystallize in the tetrahedral phase with the 14/mcm (140) space group. The crystallite size was determined by Scherer formula and was found to be 70 nm. The photoluminescent excitation of these nanocrystals at 278 nm yielded the characteristic emission peaks at 545 nm and 489 nm due to {sup 5}D{sub 4} → {sup 7}F{sub 5} (magnetic-dipole) and {sup 5}D{sub 4} → {sup 7}F{sub 6} (electric-dipole) transitions, respectively. The optimum activator concentration was found to be 3 mol% and the concentration quenching arising from the over-doping was attributed to the quadrupole–quadrupole interactions. The excellent luminescent profile of these nano-scaled particles suggests their auspicious applications in the solid-state lighting and display technology.

• OSTI ID: 22805437
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 99; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
BARIUM COMPOUNDS
COLOR
COMBUSTION
DOPED MATERIALS
ELECTRIC DIPOLES
ENERGY TRANSFER
EXCITATION
LATTICE PARAMETERS
MAGNETIC DIPOLES
NANOPARTICLES
NANOSTRUCTURES
PHOSPHORS
PHOTOLUMINESCENCE
QUADRUPOLES
QUENCHING
SOLUTIONS
SPACE GROUPS
SPECTROSCOPY
SYNTHESIS
TERBIUM IONS
UREA
X-RAY DIFFRACTION