The Open Applied Physics Journal

2009, 2 : 1-4
Published online 2009 January 02. DOI: 10.2174/1874183500902010001
Publisher ID: TOAPJ-2-1

Enhancement in Photoluminescence on Mg Substitution in MgSrAlO: Eu, Nd

H. Ryu and K.S. Bartwal
Energy Materials Research Centre, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Republic of Korea

ABSTRACT

Strontium aluminate, SrAl2O4 is well-known phosphor host material with spinel structure. Mg substituted compositions, MgxSr1-xAl2O4: Eu, Nd (with x= 0.05 - 0.25) were prepared by solid-state reaction method. Effect of Mg substitution on structure and photoluminescence was investigated. Prepared compositions were characterized for the phase and crystallinity by powder X-ray diffraction. The micro-structural investigations were carried out by transmission electron microscopy (TEM) technique. Photoluminescence characteristics show the intense emission for MgSrAl2O2:Eu2+, Nd3+ in the green region (λmax = 512 nm) with long persistence. The green emission corresponds to transitions from 4f6 5d1 to 4f7of Eu2+ ion.

PACS: 78.55.-m; 78.55.Hx.

Keywords:

Citalopram, SSRI, nefazodone.