NDLI: Photoluminescence and thermoluminescence properties of Eu doped and Eu ,Dy co-doped Ba MgSi O phosphors.

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Photoluminescence and thermoluminescence properties of Eu doped and Eu ,Dy co-doped Ba MgSi O phosphors.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Sao, Sanjay Kumar Brahme, Nameeta Bisen, D. P. Tiwari, Geetanjali
Description	Country affiliation: India Author Affiliation: Sao SK ( School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University Raipur, Chhattisgarh, India. sanjaysao7583@gmail.com.); Brahme N ( School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University Raipur, Chhattisgarh, India. namitabrahme@gmail.com.); Bisen DP ( School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University Raipur, Chhattisgarh, India.); Tiwari G ( School of Studies in Physics and Astrophysics, Pt. Ravishankar Shukla University Raipur, Chhattisgarh, India.)
Abstract	In this work, we report the preparation, characterization, comparison and luminescence mechanisms of Eu -doped and Eu ,Dy -co-doped Ba MgSi O (BMSO) phosphors. Prepared phosphors were synthesized via a high temperature solid-state reaction method. All prepared phosphors appeared white. The phase structure, particle size, and elemental analysis were analyzed using X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy-dispersive X-ray (EDX) analysis. The luminescence properties of the phosphors were investigated by thermoluminescence (TL) and photoluminescence (PL). The PL excitation and emission spectra of Ba MgSi O :Eu showed the peak to be around 381 nm and 490 nm respectively. The PL excitation spectrum of Ba MgSi O :Eu Dy showed the peak to be around 341 nm and 388 nm, and the emission spectrum had a broad band around 488 nm. These emissions originated from the 4f 5d to 4f transition of Eu . TL analysis revealed that the maximum TL intensity was found at 5 mol% of Eu doping in Ba MgSi O phosphors after 15 min of ultraviolet (UV) light exposure. TL intensity was increased when Dy ions were co-doped in Ba MgSi O :Eu and maximum TL intensity was observed for 2 mol% of Dy . TL emission spectra of Ba MgSi O :0.05Eu and Ba MgSi O :0.05Eu ,0.02Dy phosphors were found at 500 nm. TL intensity increased with UV exposure time up to 15 min, then decreased for the higher UV radiation dose for both Eu doping and Eu,Dy co-doping. The trap depths were calculated to be 0.54 eV for Ba MgSi O :0.05Eu and 0.54 eV and 0.75 eV for Ba MgSi O :0.05Eu ,0.02Dy phosphors. It was observed that co-doping with small amounts of Dy enhanced the thermoluminescence properties of Ba MgSi O phosphor. Copyright © 2016 John Wiley & Sons, Ltd. [Correction added on 5 April 2016, after first online publication: The following parts of the abstract have been edited for consistency. '4f65d1' has been corrected to '4f 5d ', '4f7' has been corrected to '4f ', 'Ba1.95' has been corrected to 'Ba ' and 'Ba1.93' has been corrected to 'Ba ' respectively.].
File Format	HTM / HTML
ISSN	15227235
Issue Number	7
Journal	Luminescence
Volume Number	31
e-ISSN	15227243
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2016-11-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Biophysics Discipline Biochemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Biophysics

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