A red phosphor for nUV LED based on (Y,Gd)BO3:Eu3+
| Autor: | Ravi Bhaskar, R. Satheesh Kumar, Arunachalam Lakshmanan, M.T. Jose, V.V. Siva Kumar, Preema C. Thomas |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Photoluminescence business.industry Mechanical Engineering Analytical chemistry Solid-state Potential candidate Sintering Phosphor Condensed Matter Physics Plasma display law.invention Mechanics of Materials law Optoelectronics General Materials Science Luminescence business Light-emitting diode |
| Zdroj: | Materials Letters. 64:1809-1812 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2010.05.034 |
| Popis: | (Y,Gd)BO3:Eu3+ based phosphors were prepared by combustion technique followed by solid state sintering in air. The 4f-4f excitation at 394 nm of (Y0.54Gd0.46)x (BO3)y:Eu3+ exhibits red emission at 593 nm. Its photoluminescence (PL) efficiency depends critically on the BO3 to (Y,Gd) molar ratio. Optimal luminescence was obtained at the y/x molar ratio of 1.38. A 12-fold increase in its luminescence efficiency was seen with an increase in Eu concentration from 0.5 to 8.4 mol% at this y/x ratio. At 8.4 mol% of Eu concentration, the PL sensitivity of (Y0.54Gd0.46)x (BO3)y:Eu3+ is 40% higher than that of the commercial (Y,Gd)BO3:Eu3+ phosphor. In view of the high luminescence efficiency, this phosphor could serve as a potential candidate for application as a red phosphor for nUV LED apart from its known application in plasma display panels. |
| Databáze: | OpenAIRE |
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