Introducing Eu 2+ into yellow phosphor LiBaB 9 O 15 :Ce 3+ , Dy 3+ as blue emitting source to realize white emission
| Autor: | Qiongyu Bai, Shuchao Xu, Nian Fu, Zhijun Wang, Panlai Li, Zhiping Yang, Ting Li |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Doping Analytical chemistry Phosphor Nanotechnology 02 engineering and technology Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Emission intensity 0104 chemical sciences Electronic Optical and Magnetic Materials Ion Inorganic Chemistry Materials Chemistry Ceramics and Composites Quantum efficiency Physical and Theoretical Chemistry Chromaticity 0210 nano-technology Luminescence |
| Zdroj: | Journal of Solid State Chemistry. 248:26-31 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/j.jssc.2017.01.018 |
| Popis: | A series of Dy3+, Ce3+/Dy3+, Eu2+/Dy3+ and Ce3+/Eu2+/Dy3+ doping LiBaB9O15 (LBB) phosphors were synthesized via a high temperature solid-state method. LBB:Dy3+ cannot create light under ultraviolet radiation, however, LBB:Ce3+, Dy3+ can produce yellow emission under 295 nm excitation. The energy transfer occurs from Ce3+ to Dy3+ ions via electric dipole-dipole interaction and the critical distance is estimated to be 21.15 A based on concentration quenching model. Generally, Eu2+ ion is a sensitizer to Dy3+ ion, however, there is only the emission of Eu2+ in LBB:Eu2+, Dy3+, which means there is no energy transfer from Eu2+ to Dy3+ ions. Interestingly enough, when doping Eu2+ ion into LBB:Ce3+, Dy3+, white emission can be achieved by increase the blue (350–425 nm) emission intensity. The spectral property, quantum efficiency, CIE chromaticity coordinates and thermal quenching property of LBB:Ce3+, Eu2+, Dy3+ are investigated. The results indicate that LBB:Ce3+, Eu2+, Dy3+ may be a potential application to white light emitting diodes. |
| Databáze: | OpenAIRE |
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