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Synthesis, characterization and optical properties of LaAlO(3):Ho(3+) phosphor

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata

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Title Synthesis, characterization and optical properties of LaAlO(3):Ho(3+) phosphor
Creator Singh, Vijay
Naidu, D T
Chakradhar, R P S
Ratnakaram, Y C
Zhu, Jun-Jie
Soni, Manish
Subject Physical Properties
Description Holmium-doped lanthanum aluminate (LaAlO(3)) powder phosphors have been prepared at furnace temperatures as low as 500 degrees C by using the combustion route without further calcining treatment. Powder X-ray diffraction and Fourier-transform infrared spectrometry measurements were used to characterize the prepared combustion products, while the optical properties were studied using UV-vis-NIR and photoluminescence spectroscopy. The Judd-Ofelt (J-O) model was applied to obtain the oscillator strengths (f) and three phenomenological intensity parameters. Using J-O parameters (Omega(2), Omega(4) and Omega(6)) the radiative transition probabilities (A(ab)), radiative lifetimes (tau(R)) and branching ratios have been calculated for certain excited states of Ho(3+). Using the Fuchtbauer-Ladenberg formula, the stimulated emission cross-sections (sigma(emi)) for some interesting transitions, such as (5)S(2) -> (5)I(8) and (5)F(8) -> (5)I(8) of Ho(3+) in LaAlO(3), were determined and discussed. (C) 2008 Published by Elsevier B.V.
Publisher Elsevier
Date 2008-10-01
Type Article
Format application/pdf
Identifier http://cgcri.csircentral.net/476/1/Physica_B_403_(2008)_3781%E2%80%933785.pdf
Singh, Vijay and Naidu, D T and Chakradhar, R P S and Ratnakaram, Y C and Zhu, Jun-Jie and Soni, Manish (2008) Synthesis, characterization and optical properties of LaAlO(3):Ho(3+) phosphor. Physica B-Condensed Matter, 403 (19-20). pp. 3781-3785. ISSN 0921-4526
Relation http://cgcri.csircentral.net/476/