Photoluminescence characteristics of new stannate pyrochlore based red phosphors: CaLaSnNbO7: Eu3+

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Title:	Photoluminescence characteristics of new stannate pyrochlore based red phosphors: CaLaSnNbO7: Eu3+
Authors:	Mahesh, S K Prabhakar Rao, P Mariyam Thomas Radhakrishnan, A N Peter Koshy
Keywords:	Photoluminescence Stannate pyrochlore Red phosphors
Issue Date:	Sep-2012
Publisher:	Springer
Citation:	Journal of Materials Science: Materials in Electronics 23(9):1605-1609
Abstract:	New stannate pyrochlore based red emitting phosphor materials: CaLa1-xSnNbO7: xEu3? were prepared by the conventional solid state route and characterized by Powder X-ray diffractometer, scanning electron microscope and fluorescence measurements. Optimization studies by way of varying the calcination temperatures show that CaLaSnNbO7: Eu3? prepared at 1,400 C displayed the maximum luminescence characteristics. The dominant emission peak of CaLaSnNbO7: xEu3? phosphor is 5D0 ? 7F2 forced hypersensitive electric dipole transition which indicates the deviation of pyrochlore A-site from inversion symmetry. The present quaternary pyrochlore phosphors show strong red luminescence (*612 nm)under near UV (394 nm) and blue light (465 nm)excitations
URI:	http://hdl.handle.net/123456789/427
Appears in Collections:	2012

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