| Autor: |
Xianqing Piao, Guangzhou Zhou, Yanpeng Lü, Zhuo Sun, Fengyang Zhao |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Journal of Rare Earths. 33:469-474 |
| ISSN: |
1002-0721 |
| DOI: |
10.1016/s1002-0721(14)60442-7 |
| Popis: |
Orange-red emitting (Sr 0.883- x Ba 0.1 Lu 0.0.17 Eu x ) 3 (Si 0.95 Al 0.05 )O 5 phosphors were synthesized by conventional solid-state reaction. The effect of NH 4 F flux on structural and luminescent properties of phosphors was investigated. Results suggested that the optimal content of NH 4 F flux was 3 wt.% and the optimal doping concentration of Eu 2+ was x =0.023 mol. The phosphors showed intense absorption in near-ultraviolet to blue region and exhibited orange-red emissions. The thermal stability of synthesized (Sr 0.86 Ba 0.1 Lu 0.017 Eu 0.023 ) 3 (Si 0.95 Al 0.05 )O 5 phosphor were examined and compared with commercial YAG:Ce 3+ yellow phosphors. Combining an InGaN blue 460 nm chip and a white-emitting (Sr 0.86 Ba 0.1 Lu 0.017 Eu 0.023 ) 3 (Si 0.95 Al 0.05 )O 5 phosphor produced a white- light LED, demonstrating CIE chromaticity coordinates of (0.314, 0.329) and a color temperature of 5595 K. All results showed that this phosphor is a promising candidate as orange-red emitting phosphor for white light emitting diode (w-LED) application. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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