resumo
Eu3+-doped Na3Gd(PO4)(2) phosphors were synthesized by the modified citrate gel combustion technique. From the XRD pattern, structure of the compound was found to be orthorhombic with a particle size of 10-20 nm. The emission spectra revealed that the Na3Gd(PO4)(2):Eu3+ phosphors can be excited effectively by 394 nm pump wavelength. From the concentration dependent photoluminescence studies, the optimum concentration for efficient luminescence of Eu3+ ions in Na3Gd(PO4)(2) phosphor has been found to be 1.5 mol%. Decay curves of the D-5(0) level of Eu3+ ions were recorded by monitoring the emission at 596 nm corresponding to D-5(0) -> F-7(1) transition and are found to be single exponential for all the concentrations. The chromaticity properties for different concentrations of Na3Gd(PO4)(2):Eu3+ nanophosphors were calculated from emission spectra and analyzed in the frame work of CIE color diagram. (C) 2014 Elsevier B.V. All rights reserved.
palavras-chave
IRON PHOSPHATE-GLASSES; FLUOROPHOSPHATE GLASSES; RAMAN-SPECTROSCOPY; OPTICAL-ABSORPTION; LITHIUM PHOSPHATE; ENERGY-TRANSFER; LEAD PHOSPHATE; EU3+; PHOTOLUMINESCENCE; FLUORESCENCE
categoria
Spectroscopy
autores
Chengaiah, T; Jamalaiah, BC; Moorthy, LR
nossos autores
Bungala Chinna Jamalaiah
Bolseiro de pós-DoutoramentoGrupos
agradecimentos
One of the authors CKJ is grateful to DST, Govt. of India for financial support within the Indo-Spanish joint programme of cooperation in Science and Technology (DST/INT/SPAIN/P-38/11). Also LRM would like to thank the Council of Scientific and Industrial Research (CSIR), New Delhi, India for sanction of financial support in the form of major research Projects No. 03(1224)/12/EMR-II.