Cover Page May-2019-Advanced Materials Letters

Advanced Materials Letters

Volume 10, Issue 5, Pages 341-345, May 2019
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Graphene has emerged as the most popular subject area in the active research field since its discovery in 2004. The published documents illustrate the popularity of Graphene research and innovations, spontaneously increased from about 150 in 2004 to 21,500 in 2018. Graphene is relatively young but high-hope for markets. The cover photo of May 2019 issue describes the structure of a cylindrical Graphene to celebrate the 15th anniversary of it's discovery.


Synthesis and role of co-dopants (alkaline earth divalents and halides) on the photoluminescence of Eu2+ doped BaAl2O4 phosphor

V. Ponnusamy1*, A. Azhagiri1, R. Satheesh Kumar2, M.T. Jose3

1Department of Physics, Anna University, M.I.T Campus, Chennai, Tamil Nadu, 600 044, India

2Department of Electronic Science and Physics, Jaya College of Arts and Science, Tirunindravur, Chennai, Tamil Nadu, 602 024, India

3Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, 603 102, India

Adv. Mater. Lett., 2019, 10 (5), pp 341-345

DOI: 10.5185/amlett.2019.2218

Publication Date (Web): Jan 14, 2019

E-mail: vps@annauniv.edu 

Abstract

Pure and Eu2+ doped BaAl2O4 phosphors have been synthesized by simple solid state reaction technique. Synthesized BaAl2O4 samples were studied using powder X-ray diffraction analysis (XRD), Photoluminescence spectroscopy (PL), Fourier Transform - Infra Red Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). Alkaline earth divalent (Sr, Ca, Zn, Mg) and halides (F, Cl, Br, I) were used as co-dopants to enhance the PL properties of BaAl2O4:Eu2+ phosphor. Significant impact of ionic radii of co-dopants on PL properties of the phosphor is reported.

Keywords

BaAl2O4, europium, alkaline earth divalent and halides, photoluminescence.

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