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Title: Investigations of the optical and EPR properties of LiGa{sub 5}O{sub 8}:Cr{sup 3+} phosphor

Highlights: • Cr{sup 3+} doped LiGa{sub 5}O{sub 8} phosphor was synthesized by solution combustion synthesis. • Morphological studies show the non-uniform distribution of particles. • Photoluminescence spectra of Cr{sup 3+} doped LiGa{sub 5}O{sub 8} showed the characteristic Cr{sup 3+} peaks. • EPR spectrum showed Cr{sup 3+} ions in tetragonally distorted octahedral symmetry. - Abstract: Red emitting LiGa{sub 5}O{sub 8} doped with Cr{sup 3+} ions has been prepared by a low temperature solution combustion route. The as-prepared phosphor was studied using X-ray diffraction and scanning electron microscopic techniques. The optical spectrum exhibits two broad bands characteristic of Cr{sup 3+} ions in an octahedral symmetry. Upon excitation at 590 nm, the material displays narrow red emission line centered at 715 nm due to the {sup 2}E{sub g} → {sup 4}A{sub 2g} transition of Cr{sup 3+} ions. Electron paramagnetic resonance analyses of the sample confirm the presence of Cr{sup 3+} in the LiGa{sub 5}O{sub 8} matrix.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [1]
  1. Department of Chemical Engineering, Konkuk University, Seoul 143-701 (Korea, Republic of)
  2. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar- 522 510 (India)
  3. Department of Physics, Government College for Men (A), Kadapa 516 004 (India)
  4. Department of Physics, Sri Venkateswara University, Tirupati 517 502 (India)
Publication Date:
OSTI Identifier:
22420756
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 61; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADMINISTRATIVE PROCEDURES; CHROMIUM IONS; DOPED MATERIALS; ELECTRON SPIN RESONANCE; EMISSION SPECTRA; EXCITATION; GALLIUM OXIDES; LITHIUM COMPOUNDS; OPTICAL PROPERTIES; PARAMAGNETISM; PHOTOLUMINESCENCE; SCANNING ELECTRON MICROSCOPY; SYNTHESIS; X-RAY DIFFRACTION