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)

Journal Article · Wed Apr 15 04:00:00 EDT 2015 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.12.028· OSTI ID:22475733

Jena, Paramananda ^[1]; Natarajan, V. ^[2]; Padmaraj, O. ^[1]; Venkateswarlu, M. ^[3]

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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)

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.

• OSTI ID: 22475733
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 64; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

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