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Title: On the photo-luminescence properties of sol–gel derived undoped and Dy{sup 3+} ion doped nanocrystalline Scheelite type AMoO{sub 4} (A = Ca, Sr and Ba)

Nanocrystalline Scheelite type Dy doped AMoO{sub 4} [where A = Ba, Sr and Ca] samples were prepared by acrylamide assisted sol–gel process and characterized by XRD, FT-Raman, FTIR, SEM and photoluminescence (PL). PL of undoped sample shows blue/green emission in CaMoO{sub 4} and SrMoO{sub 4} but multicolour visible emission leading to near white light in BaMoO{sub 4} nanoparticles; the origin of which is explained. It was observed that on doping 0.5 mol% of Dy{sup 3+} in molybdate samples complete energy transfer takes place in case of SrMoO{sub 4} and BaMoO{sub 4}, but host contributed substantially in Dy doped BaMoO{sub 4} sample, resulting in biexponential decay. It was also observed that symmetry around Dy{sup 3+} decreases as the size of alkaline earth ion increases. Due to combined blue, yellow and red colour emission in dysprosium doped sample; all samples showed near white light emission under UV and near UV excitation.
Authors:
 [1] ;  [2] ;  [2] ;  [1] ;  [1] ;  [3]
  1. Department of Physics, Pondicherry University, Pondicherry 605014 (India)
  2. Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)
  3. R & D Amara Raja Batteries Ltd., Karakambadi 517501, AP (India)
Publication Date:
OSTI Identifier:
22475733
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 64; 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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACRYLAMIDE; BARIUM COMPOUNDS; CALCIUM COMPOUNDS; COLOR; CRYSTALS; DOPED MATERIALS; DYSPROSIUM ADDITIONS; EXCITATION; FOURIER TRANSFORMATION; INFRARED SPECTRA; MOLYBDATES; NANOPARTICLES; NANOSTRUCTURES; PHOTOLUMINESCENCE; SCANNING ELECTRON MICROSCOPY; STRONTIUM COMPOUNDS; SYMMETRY; VISIBLE RADIATION; X-RAY DIFFRACTION