✦ LIBER ✦

Defect structure and its relevance to photoluminescence in SrAl2O4:Eu2+, Nd3+

✍ Scribed by H. Ryu; K.S. Bartwal

Publisher: Elsevier Science
Year: 2009
Tongue: English
Weight: 602 KB
Volume: 404
Category: Article
ISSN: 0921-4526
DOI: 10.1016/j.physb.2009.02.012

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✦ Synopsis

Doubly-doped strontium aluminate, SrAl 2 O 4 :Eu, Nd with 1 mol% Eu 2+ fixed, and varying Nd 3+ concentrations of 1, 2 and 3 mol% were prepared by solid-state synthesis method. Effect of Nd codoping on crystalline structure and photoluminescence properties were investigated. The prepared compositions were characterized for phase, crystallinity and micro-structural defects by powder X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. Photoluminescence characteristics show the intense emission for SrAl 2 O 4 :Eu 2+ , Nd 3+ in the green region (l max ¼ 515 nm). The emission for these doubly doped compositions also has long persistence.

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