Structural, optical and dielectric properties of Ce{sup 3+}, Pr{sup 3+}, Nd{sup 3+} doped LaF{sub 3} hexagonal nanoparticles

Journal Article · Wed Jun 24 04:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4917643· OSTI ID:22490219

Khandpekar, M. M. ^[1]

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1. Material Research Lab, Department of Physics, Birla College, Kalyan-421304, Maharashtra (India)

Well dispersed, elongated and hexagonal LaF{sub 3}: Ce{sup 3+}, Pr{sup 3+}, Nd{sup 3+} nanocrystals have been synthesized by microwave assisted technique. X-ray diffraction (XRD) studies indicates the formation of nanocrystals with unit cell parameters a = b = 7.144 A{sup 0}, c = 7.281 A{sup 0}, (c/a = 1.019) and unit cell volume of 321.86 (A{sup 0}){sup 3} of average crystallite size 21 nm have been traced by from XRD analysis and it is close agreement with transmission electron microscope (TEM) analysis. Ultra-violet (UV) absorption spectrum shows an edge at 250 nm indicating presence of wide transparency window region between 200 nm-800 nm. Fundamental groups have been observed in the Fourier transformation infrared (FTIR) and FT-Raman spectra. The blue luminescent properties of the nanoparticles were investigated by excitation and emission spectra. Room temperature Electrical and dielectric properties were studied for the synthesized nanocrystals the values of conductivity & resistivity is found to be in the order of 10{sup −6} Scm{sup −1} and resistivity 10{sup 5} Ω cm. Low dielectric constant value was observed in the LaF{sub 3}: Ce{sup 3+}, Pr{sup 3+}, and Nd{sup 3+} nanocrystals at high frequency indicating its suitability for electro optics applications.

• OSTI ID: 22490219
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1665; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
CERIUM IONS
DOPED MATERIALS
EMISSION SPECTRA
EXCITATION
FOURIER TRANSFORMATION
INFRARED SPECTRA
LANTHANUM FLUORIDES
LUMINESCENCE
MICROWAVE RADIATION
NANOPARTICLES
NANOSTRUCTURES
NEODYMIUM IONS
OPACITY
PERMITTIVITY
PRASEODYMIUM IONS
RAMAN SPECTRA
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION