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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 646 pages |
| ISBN: | 978-0-9879917-6-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Tunable Luminescence Properties Of Sm3+ And Sm3+/Tb3+ Ions Doped Nanocrystalline Ca2Gd8Si6O26 Phosphors
Kyeongsoon Park1; G. Raju 1;1SEJONG UNIVERSITY, Seoul, Korea, South;
Type of Paper: Regular
Id Paper: 447
Topic: 9
Abstract:
Nanocrystalline Ca2Gd8Si6O26 (CGS):Sm3+ and CGS:Tb3+/Sm3+ phosphors were prepared by solvothermal reaction method for light emitting diode (LED) and field emission display (FED) applications. The XRD patterns of these phosphors confirmed their oxyapatite structure in the hexagonal lattice. The visible luminescence properties of these phosphors were investigated by exciting with ultraviolet (UV) or near-UV light and low voltage electron beam. The photoluminescence (PL) properties of Ca2Gd8Si6O26 (CGS):Sm3+ and CGS:Tb3+/Sm3+ phosphors were investigated as a function of Sm3+ concentration. Cathodoluminescence (CL) properties had also been examined by changing the acceleration voltage. The CGS:Sm3+ showed the dominant orange emission due to the 4G5/2→6H7/2 transition. The CGS:Tb3+/Sm3+ phosphor showed the green, orange and white emissions when excited with 275, 378, and 405 nm wavelengths, respectively. The chromaticity coordinates of these phosphors were comparable to or better than those of standard phosphors for LED or FED devices.