Novel red phosphors Na{sub 2}CaSiO{sub 4}:Eu{sup 3+} for light-emitting diodes
- Department of Materials Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 730000 (China)
Highlights: {yields} NCSE phosphors can be efficiently excited by ultraviolet light. {yields} The PL integral intensity of NCSE excited at 393 nm is 1.87 times of Y{sub 2}O{sub 3}:Eu{sup 3+}. {yields} NCSE phosphors have good color saturation and high quantum efficiency. -- Abstract: Novel red phosphors Na{sub 2}CaSiO{sub 4}:xEu{sup 3+} were synthesized using high temperature solid-state reaction and their luminescence characteristics were investigated for the first time. The excitation spectra indicate that the Na{sub 2}CaSiO{sub 4}:xEu{sup 3+} phosphors can be effectively excited by ultraviolet (393 nm) light. The emission spectra of Na{sub 2}CaSiO{sub 4}:xEu{sup 3+} phosphors invariably exhibit four peaks assigned to the {sup 5}D{sub 0}-{sup 7}F{sub J} (J = 1, 2, 3 and 4) transitions of Eu{sup 3+} under 393 nm excitation. The Commission Internationale de l'Eclairage (CIE) chromaticity coordinates and quantum efficiency (QE) are (0.66, 0.34) and 58.9%, respectively. The good color saturation and high quantum efficiency indicate that Na{sub 2}CaSiO{sub 4}:Eu{sup 3+} phosphors are potential candidate for light-emitting diodes.
- OSTI ID:
- 22212194
- Journal Information:
- Materials Research Bulletin, Vol. 46, Issue 7; Other Information: Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
A novel red phosphor Ca{sub 12}Al{sub 14}O{sub 32}Cl{sub 2}:Eu{sup 3+} for near UV white light-emitting diodes
Photoluminescence and cathodoluminescence properties of Eu{sup 3+} ions activated AMoO{sub 4} (A = Mg, Ca, Sr, Ba) phosphors