Tunable luminescence of Ce3+/Li+, Eu2+ co-doped Ca4(PO4)2O phosphor for white light emitting diodes
| Autor: | Degang Deng, Chenxia Li, Xu Shiqing, Qinghua Yang, Yinqun Li, Youjie Hua, Hongping Ma |
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| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Photoluminescence Materials science Spectrometer business.industry Analytical chemistry Phosphor 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Mass spectrometry 01 natural sciences 0104 chemical sciences Geochemistry and Petrology Optoelectronics 0210 nano-technology business Absorption (electromagnetic radiation) Luminescence Diode |
| Zdroj: | Journal of Rare Earths. 34:7-11 |
| ISSN: | 1002-0721 |
| DOI: | 10.1016/s1002-0721(14)60570-6 |
| Popis: | Phosphors Ca 4 (PO 4 ) 2 O:Ce 3+ /Li + , Eu 2+ were prepared by solid state reaction successfully, and characterized by X-ray diffraction, UV-Vis spectrometer and photoluminescence spectrometry. The as-prepared phosphors exhibited strong absorption in the UV-visible region and dual-emission bands centered at approximately 460 and 630 nm. Energy transfer from Ce 3+ to Eu 2+ was also observed. By varying the excitation wavelength, these new phosphors exhibited tunable emissions from blue to white and then to yellow, making them potential candidates as UV-convertible phosphors for white light emitting diodes. |
| Databáze: | OpenAIRE |
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